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Smithson M, Diffalha SA, Irwin RK, Williams G, McLeod MC, Somasundaram V, Bellis SL, Hardiman KM. ST6GAL1 is associated with poor response to chemoradiation in rectal cancer. Neoplasia 2024; 51:100984. [PMID: 38467087 PMCID: PMC11026834 DOI: 10.1016/j.neo.2024.100984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 02/26/2024] [Accepted: 02/27/2024] [Indexed: 03/13/2024]
Abstract
INTRODUCTION Colorectal cancer is the third most common cause of cancer death. Rectal cancer makes up a third of all colorectal cases. Treatment for locally advanced rectal cancer includes chemoradiation followed by surgery. We have previously identified ST6GAL1 as a cause of resistance to chemoradiation in vitro and hypothesized that it would be correlated with poor response in human derived models and human tissues. METHODS Five organoid models were created from primary human rectal cancers and ST6GAL1 was knocked down via lentivirus transduction in one model. ST6GAL1 and Cleaved Caspase-3 (CC3) were assessed after chemoradiation via immunostaining. A tissue microarray (TMA) was created from twenty-six patients who underwent chemoradiation and had pre- and post-treatment specimens of rectal adenocarcinoma available at our institution. Immunohistochemistry was performed for ST6GAL1 and percent positive cancer cell staining was assessed and correlation with pathological grade of response was measured. RESULTS Organoid models were treated with chemoradiation and both ST6GAL1 mRNA and protein significantly increased after treatment. The organoid model targeted with ST6GAL1 knockdown was found to have increased CC3 after treatment. In the tissue microarray, 42 percent of patient samples had an increase in percent tumor cell staining for ST6GAL1 after treatment. Post-treatment percent staining was associated with a worse grade of treatment response (p = 0.01) and increased staining post-treatment compared to pre-treatment was also associated with a worse response (p = 0.01). CONCLUSION ST6GAL1 is associated with resistance to treatment in human rectal cancer and knockdown in an organoid model abrogated resistance to apoptosis caused by chemoradiation.
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Affiliation(s)
- Mary Smithson
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Al 35294, USA
| | - Sameer Al Diffalha
- Department of Pathology, University of Alabama at Birmingham, Birmingham, Al 35294, USA
| | - Regina K Irwin
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Al 35294, USA
| | - Gregory Williams
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Al 35294, USA
| | - M Chandler McLeod
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Al 35294, USA
| | - Vivek Somasundaram
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Al 35294, USA
| | - Susan L Bellis
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, Al 35294, USA
| | - Karin M Hardiman
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Al 35294, USA; Department of Surgery, Birmingham Veterans Affairs Medical Center, Birmingham, Al 35294, USA.
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Montgomery KB, Mellinger JD, Jones A, McLeod MC, Zmijewski P, Sarosi GA, Brasel KJ, Klingensmith ME, Minter RM, Buyske J, Lindeman B. Validity of Entrustable Professional Activities in a National Sample of General Surgery Residency Programs. J Am Coll Surg 2024; 238:376-384. [PMID: 38224150 PMCID: PMC10942265 DOI: 10.1097/xcs.0000000000000967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2024]
Abstract
BACKGROUND The American Board of Surgery has endorsed competency-based education as vital to the assessment of surgical training. From 2018 to 2020, a national pilot study was conducted at 28 general surgery programs to evaluate feasibility of implementing entrustable professional activities (EPAs) for 5 common general surgical conditions. ACGME core competency Milestones were also rated for each resident by program clinical competency committees. This study aimed to evaluate the validity of general surgery EPAs compared with Milestones. STUDY DESIGN Prospectively collected, de-identified EPA Pilot Study data were analyzed. EPAs studied were EPA-1 (gallbladder), EPA-2 (inguinal hernia), EPA-3 (right lower quadrant pain), EPA-4 (trauma), and EPA-5 (consult). Variables abstracted included levels of EPA entrustment (1 to 5) and corresponding ACGME Milestone subcompetency ratings (1 to 5) for the same study cycle. Spearman's correlations were used to evaluate the relationship between summative EPA scores and corresponding Milestone ratings. RESULTS A total of 493 unique residents received a summative entrustment decision. EPA summative entrustment scores had moderate-to-strong positive correlation with mapped Milestone subcompetencies, with median rho value of 0.703. Among operation-focused EPAs, median rho values were similar between EPA-1 (0.688) and EPA-2 (0.661), but higher for EPA-3 (0.833). EPA-4 showed a strong positive correlation with diagnosis and communication competencies (0.724), whereas EPA-5, mapped to the most Milestone subcompetencies, had the lowest median rho value (0.455). CONCLUSIONS Moderate-to-strong positive correlation was noted between EPAs and patient care, medical knowledge, and communication Milestones. These findings support the validity of EPAs in general surgery and suggest that EPA assessments can be used to inform Milestone ratings by clinical competency committees.
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Affiliation(s)
| | - John D Mellinger
- American Board of Surgery, Philadelphia, PA
- Department of Surgery, Southern Illinois University, Springfield, IL
| | | | - M Chandler McLeod
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL
| | - Polina Zmijewski
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL
| | - George A Sarosi
- Department of Surgery, University of Florida, Gainesville, FL
| | - Karen J Brasel
- Department of Surgery, Oregon Health & Science University, Portland, OR
| | - Mary E Klingensmith
- Accreditation Council for Graduate Medical Education, Chicago, IL
- Department of Surgery, Washington University in St. Louis, St. Louis, MO
| | | | - Jo Buyske
- American Board of Surgery, Philadelphia, PA
- Department of Surgery, University of Pennsylvania, Philadelphia, PA
| | - Brenessa Lindeman
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL
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Hood C, Zmijewski PV, McLeod MC, Herring B, Bahl D, Fazendin J, Lindeman B, Chen H, Gillis A. Young and resilient: Unraveling papillary thyroid cancer outcomes in males under 40. World J Surg 2024. [PMID: 38517350 DOI: 10.1002/wjs.12151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 02/18/2024] [Indexed: 03/23/2024]
Abstract
BACKGROUND While males present with more adverse clinicopathologic features in papillary thyroid carcinoma (PTC), younger age has previously been shown to be a favorable prognostic factor. We examined the combined effect of male sex and young age on PTC outcomes. METHODS We conducted a retrospective analysis of a prospectively maintained database of thyroid cancer surgery patients (2000-2020) at a single quaternary care institution. We included papillary thyroid carcinoma cases and excluded those with prior cancer-related thyroid surgery. We examined demographics, cancer stage, surgical outcomes, and complications by age and sex, analyzing groups below and above the age of 40 years. RESULTS A total of 680 patients with PTC were included. Females constituted 68% (age ≥40 years: 44% and <40 years: 24%) and males 32% (≥40 years: 24% and <40 years: 8%). A significant difference (p < 0.001) of N1 disease distribution was found between the groups. N1a metastasis was greater in patients younger than 40 regardless of sex ((M < 40 (15%), F < 40 (15%), M ≥ 40 (12%), and F ≥ 40 (9%)). While, M < 40 had greater N1b metastasis (36%) than all other groups (M ≥ 40 (28%), F < 40 (22%), and F ≥ 40 (10%)). There was no significant difference in the distribution of T stages between groups. Groups showed no differences in 30-day outcomes, recurrence at 1 year, reoperation, mortality, nerve injury, or hypocalcemia. CONCLUSIONS Young males with PTC face increased occurrence of nodal metastasis yet experience similar recurrence rates as their female and older counterparts. Subgroup analysis underscores the predictive role of sex and age in advanced PTC cases.
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Affiliation(s)
- Caleb Hood
- The University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama, USA
| | - Polina V Zmijewski
- The University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama, USA
| | - M Chandler McLeod
- The University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama, USA
| | - Brendon Herring
- The University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama, USA
| | - Deepti Bahl
- The University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama, USA
| | - Jessica Fazendin
- The University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama, USA
| | - Brenessa Lindeman
- The University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama, USA
| | - Herbert Chen
- The University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama, USA
| | - Andrea Gillis
- The University of Alabama at Birmingham Heersink School of Medicine, Birmingham, Alabama, USA
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4
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Perry J, McLeod MC, Reed RD, Baker GA, Stanford LA, Allen J, Jones B, Robinson T, MacLennan PA, Kumar V, Locke JE. Patient-Level and Center-Level Factors Associated with Required Predonation Weight Loss among Obese Living Kidney Donors. Kidney360 2024; 5:437-444. [PMID: 38319632 PMCID: PMC11000741 DOI: 10.34067/kid.0000000000000381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 01/29/2024] [Indexed: 02/07/2024]
Abstract
Key Points Among obese living kidney donors, year of donation, preoperative body mass index, hypertension, and center percent of living kidney donor transplants were associated with required predonation weight loss. There were no significant differences in the likelihood of predonation weight loss requirement by race, sex, or age or by markers of preoperative metabolic dysfunction. Background The proportion of overweight/mildly obese living kidney donors (OLKDs) has increased in the past few decades, with significant center variation in the body mass index (BMI) of LKDs. The purpose of this study was to examine factors associated with required predonation weight loss among OLKDs (BMI, ≥30 kg/m2). Methods This retrospective cohort study surveyed 1097 OLKDs (1979–2020) (mean BMI, 33 kg/m2) about their donation experience. Bivariate analyses compared donor demographic and center characteristics by whether the donor reported predonation weight loss requirement. Generalized estimating equations with logit link were used to estimate marginal effects of patient-level and center-level factors. Multiple imputation using chained equations was implemented to account for missing values. Results Of 1097 OLKDs surveyed, 340 (31.0%) reported predonation weight loss requirement. Donors with a predonation weight loss requirement had slightly higher predonation BMIs and donated in more recent years at centers performing a lower percentage of living donor nephrectomies and with a lower median BMI. In multivariable logistic regression analysis, we observed transplant year (odds ratio [OR], 1.04 per year donation; 95% confidence interval [CI], 1.01 to 1.07; P = 0.005), preoperative BMI (OR, 1.16; 95% CI, 1.05 to 1.28; P < 0.01), preoperative hypertension (OR, 1.61; 95% CI, 1.08 to 2.40; P = 0.02), and center percentage of living donor kidney transplants (OR, 0.99; 95% CI, 0.98 to 1.00; P = 0.02) as significantly associated with a predonation weight loss requirement. The study found no differences in the likelihood of predonation weight loss requirement by race, sex, age, preoperative creatinine, preoperative metabolic dysfunction, or center-level median BMI of living donors. Conclusions These results suggest that both center-level and patient-level factors influence whether OLKDs are required to lose weight before donation. Future study is needed to determine whether predonation weight loss is associated with improved long-term postdonation outcomes.
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Affiliation(s)
- Jackson Perry
- University of Alabama Comprehensive Transplant Institute, Birmingham, Alabama
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Braswell AC, Jiminez V, Montgomery KB, McLeod MC, Broman KK, Eulo V. Racial and ethnic variation in presentation and outcomes of high-grade soft tissue sarcoma at a Southeastern United States comprehensive cancer center. Am J Surg 2024; 227:132-136. [PMID: 37865543 PMCID: PMC10901035 DOI: 10.1016/j.amjsurg.2023.10.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 09/01/2023] [Accepted: 10/02/2023] [Indexed: 10/23/2023]
Abstract
BACKGROUND High-grade soft tissue sarcoma is rare and associated with poor prognosis. This study examines racial and ethnic variation in presentation and outcomes at a Southeastern US cancer center. METHODS Among an institutional cohort of patients seen between January 2016-December 2021, racial and ethnic differences were evaluated using chi-squared tests, Kaplan Meier curves, and Cox proportional hazards models. RESULTS There were 295 patients (71 % Non-Hispanic White, 24 % Black, 3 % Hispanic White, 2 % Other). Black representation was greater than national cohorts (24 % vs. 12 %). Histological subtype varied by race/ethnicity (p = 0.007). Adjusting for histology and stage, survival was worse for Black vs. White patients (HR 1.71, 95 % CI 1.07-2.76) and those with metastatic disease (5.47, 3.54-8.44). In non-metastatic patients, survival differences for Black vs. White patients were attenuated by receipt of multi-modal treatment (1.53, 0.82-2.88). CONCLUSION Observed racial disparities in survival of high-grade sarcoma may be addressed by early, multidisciplinary management.
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Affiliation(s)
- Ann Carol Braswell
- Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA.
| | - Victoria Jiminez
- Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Kelsey B Montgomery
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL, USA
| | - M Chandler McLeod
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Kristy K Broman
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL, USA; Institute for Cancer Outcomes and Survivorship, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Vanessa Eulo
- Division of Oncology, Department of Internal Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
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Frey KL, McLeod MC, Cannon RM, Sheikh SS, Purvis JW, Locke JE, Orandi BJ. Non-invasive evaluation of hepatic macrosteatosis in deceased donors. Am J Surg 2023; 226:692-696. [PMID: 37558520 DOI: 10.1016/j.amjsurg.2023.07.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 07/24/2023] [Accepted: 07/26/2023] [Indexed: 08/11/2023]
Abstract
INTRODUCTION Liver allocation changes have led to increased travel and expenditures, highlighting the need to efficiently identify marginal livers suitable for transplant. We evaluated the validity of existing non-invasive liver quality tests and a novel machine learning-based model at predicting deceased donor macrosteatosis >30%. METHODS We compared previously-validated non-invasive tests and a novel machine learning-based model to biopsies in predicting macrosteatosis >30%. We also tested them in populations enriched for macrosteatosis. RESULTS The Hepatic Steatosis Index area-under-the-curve (AUC) was 0.56. At the threshold identified by Youden's J statistic, sensitivity, specificity, positive, and negative predictive values were 49.6%, 58.9%, 14.0%, and 89.7%. Other tests demonstrated comparable results. Machine learning produced the highest AUC (0.71). Even in populations enriched for macrosteatosis, no test was sufficiently predictive. CONCLUSION Commonly used clinical scoring systems and a novel machine learning-based model were not clinically useful, highlighting the importance of pre-procurement biopsies to facilitate allocation.
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Affiliation(s)
- Kayla L Frey
- University of Alabama at Birmingham, Department of Surgery, Division of Transplantation, Birmingham, AL, USA
| | - M Chandler McLeod
- University of Alabama at Birmingham, Department of Surgery, Division of Transplantation, Birmingham, AL, USA
| | - Robert M Cannon
- University of Alabama at Birmingham, Department of Surgery, Division of Transplantation, Birmingham, AL, USA
| | - Saulat S Sheikh
- University of Alabama at Birmingham, Department of Surgery, Division of Transplantation, Birmingham, AL, USA
| | - Joshua W Purvis
- University of Alabama at Birmingham, Department of Anesthesia, Birmingham, AL, USA
| | - Jayme E Locke
- University of Alabama at Birmingham, Department of Surgery, Division of Transplantation, Birmingham, AL, USA
| | - Babak J Orandi
- University of Alabama at Birmingham, Department of Surgery, Division of Transplantation, Birmingham, AL, USA; Weill Cornell Medicine, Department of Medicine, New York, NY, USA.
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Tinglin J, McLeod MC, Williams CP, Tipre M, Rocque G, Crouse AB, Krontiras H, Gutnik L. Impact of Affordable Care Act provisions on the racial makeup of patients enrolled at a Deep South, high-risk breast cancer clinic. Res Sq 2023:rs.3.rs-3359906. [PMID: 37961144 PMCID: PMC10635303 DOI: 10.21203/rs.3.rs-3359906/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Purpose Black women are less likely to receive screening mammograms and are at a higher lifetime risk for developing breast cancer compared to their White counterparts. Affordable Care Act (ACA) provisions decreased cost sharing for women's preventive screening, potentially mitigating screening disparities. We examined enrollment of a high-risk screening program before and after ACA implementation stratified by race. Methods This retrospective, quasi-experimental study examined the ACA's impact on patient demographics at a high-risk breast cancer screening clinic from 02/28/2003-02/28/2019. Patient demographic data were abstracted from electronic medical records and descriptively compared in the pre- and post-ACA time periods. Interrupted time series (ITS) analysis using Poisson regression assessed yearly clinic enrollment rates by race using incidence rate ratios (IRR) and 95% confidence intervals (CI). Results 2,767 patients enrolled in the clinic. On average, patients were 46 years old (SD, ± 12), 82% were commercially insured, and 8% lived in a highly disadvantaged neighborhood. In ITS models accounting for trends over time, Prior to ACA implementation, White patient enrollment was stable (IRR 1.01, 95% CI 1.00-1.02) while Black patient enrollment increased at 13% per year (IRR 1.13, 95% CI 1.05-1.22). Compared to the pre-ACA enrollment period, the post-ACA enrollment rate remained unchanged for White patients (IRR 0.99, 95% CI 0.97-1.01) but decreased by 17% for Black patients (IRR 0.83, 95% CI 0.74-0.92). Conclusion Black patient enrollment decreased at a high-risk breast cancer screening clinic post-ACA compared to the pre-ACA period, indicating a need to identify factors contributing to racial disparities in clinic enrollment.
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Affiliation(s)
- Jillian Tinglin
- The University of Alabama at Birmingham Heersink School of Medicine
| | | | - Courtney P Williams
- UAB DOPM: The University of Alabama at Birmingham Division of Preventive Medicine
| | | | - Gabrielle Rocque
- UAB DOM: The University of Alabama at Birmingham Department of Medicine
| | - Andrew B Crouse
- The University of Alabama at Birmingham Hugh Kaul Precision Medicine Institute
| | - Helen Krontiras
- UAB Surgery: The University of Alabama at Birmingham Department of Surgery
| | - Lily Gutnik
- UAB Surgery: The University of Alabama at Birmingham Department of Surgery
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Wang R, Price G, Disharoon M, Stidham G, McLeod MC, McMullin JL, Gillis A, Fazendin J, Lindeman B, Ong S, Chen H. Resolution of Secondary Hyperparathyroidism After Kidney Transplantation and the Effect on Graft Survival. Ann Surg 2023; 278:366-375. [PMID: 37325915 DOI: 10.1097/sla.0000000000005946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
OBJECTIVE Hyperparathyroidism (HPT) is nearly universal in patients with end-stage kidney disease. Kidney transplantation (KT) reverses HPT in many patients, but most studies have only focused on following calcium and not parathyroid hormone (PTH) levels. We sought to study the prevalence of persistent HPT post-KT at our center and its effect on graft survival. METHODS Patients who underwent KT from January 2015 to August 2021 were included and characterized by post-KT HPT status at the most recent follow-up: resolved (achieving normal PTH post-KT) versus persistent HPT. Those with persistent HPT were further stratified by the occurrence of hypercalcemia (normocalcemic versus hypercalcemic HPT). Patient demographics, donor kidney quality, PTH and calcium levels, and allograft function were compared between groups. Multivariable logistic regression and Cox regression with propensity score matching were conducted. RESULTS Of 1554 patients, only 390 (25.1%) patients had resolution of renal HPT post-KT with a mean (±SD) follow-up length of 40±23 months. The median (IQR) length of HPT resolution was 5 (0-16) months. Of the remaining 1164 patients with persistent HPT post-KT, 806 (69.2%) patients had high PTH and normal calcium levels, while 358 (30.8%) patients had high calcium and high PTH levels. Patients with persistent HPT had higher parathyroid hormone (PTH) at the time of KT [403 (243-659) versus 277 (163-454) pg/mL, P <0.001] and were more likely to have received cinacalcet treatment before KT (34.9% vs. 12.3%, P <0.001). Only 6.3% of patients with persistent HPT received parathyroidectomy. Multivariable logistic regression showed race, cinacalcet use pre-KT, dialysis before KT, receiving an organ from a deceased donor, high PTH, and calcium levels at KT were associated with persistent HPT post-KT. After adjusting for patient demographics and donor kidney quality by propensity score matching, persistent HPT (HR 2.5, 95% CI 1.1-5.7, P =0.033) was associated with a higher risk of allograft failure. Sub-analysis showed that both hypercalcemic HPT (HR 2.6, 95% CI 1.1-6.5, P =0.045) and normocalcemic HPT (HR 2.5, 95% CI 1.3-5.5, P =0.021) were associated with increased risk of allograft failure when compared with patients with resolved HPT. CONCLUSION Persistent HPT is common (75%) after KT and is associated with a higher risk of allograft failure. PTH levels should be closely monitored after kidney transplantation so that patients with persistent HPT can be treated appropriately.
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Affiliation(s)
- Rongzhi Wang
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL
| | - Griffin Price
- Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL
| | - Mitchell Disharoon
- Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL
| | - Gabe Stidham
- Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL
| | - M Chandler McLeod
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL
| | | | - Andrea Gillis
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL
| | - Jessica Fazendin
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL
| | - Brenessa Lindeman
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL
| | - Song Ong
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL
| | - Herbert Chen
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL
- Department of Surgery, University of Alabama at Birmingham, Boshell Diabetes Building (BDB), Birmingham, AL
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Smithson MG, McLeod MC, Al-Obaidi M, Harmon CA, Sawant A, Hardiman KM, Chu DI, Bhatia S, Williams GR, Hollis RH. Racial Differences in Aging-Related Deficits Among Older Adults With Colorectal Cancer. Dis Colon Rectum 2023; 66:1245-1253. [PMID: 37235857 PMCID: PMC10524491 DOI: 10.1097/dcr.0000000000002672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
BACKGROUND Despite the known influences of both race- and aging-related factors in colorectal cancer outcomes and mortality, limited literature is available on the intersection between race and aging-related impairments. OBJECTIVE To explore racial differences in frailty and geriatric deficit subdomains among patients with colorectal cancer. DESIGN Retrospective study using data from the Cancer and Aging Resilience Evaluation registry. SETTINGS A comprehensive cancer center in the Deep South. PATIENTS Older adults (aged ≥60 years) with colorectal cancer. MAIN OUTCOME MEASURES Measure of frailty and geriatric assessment subdomains of physical function, functional status, cognitive complaints, psychological function, and health-related quality of life. RESULTS Black patients lived in areas with a higher social vulnerability index compared to White patients (0.69 vs 0.49; p < 0.01) and had limited social support more often (54.5% vs 34.9%; p = 0.01). After adjustment for age, cancer stage, comorbidities, and social vulnerability index, Black patients were found to have a higher rate of frailty than White patients (adjusted OR 3.77; 95% CI, 1.76-8.18; p = 0.01). In addition, Black patients had more physical limitations (walking 1 block: adjusted OR 1.93; 95% CI, 1.02-3.69; p = 0.04), functional limitations (activities of daily living: adjusted OR 3.21; 95% CI, 1.42-7.24; p = 0.01), and deficits in health-related quality of life (poor global self-reported health: adjusted OR 2.45; 95% CI, 1.23-5.13; p = 0.01). Similar findings were shown after stratification by stage I to III vs IV. LIMITATIONS Retrospective study at a single institution. CONCLUSIONS Among older patients with colorectal cancer, Black patients were more likely to be frail than White patients, with deficits observed specifically in physical function, functional status, and health-related quality of life. Geriatric assessment may provide an important tool in addressing racial inequities in colorectal cancer. DIFERENCIAS RACIALES EN LOS DFICITS RELACIONADOS CON EL ENVEJECIMIENTO ENTRE ADULTOS MAYORES CON CNCER COLORRECTAL ANTECEDENTES: A pesar de las influencias conocidas de los factores relacionados con la raza y el envejecimiento en los resultados y la mortalidad del cáncer colorectal, hay muy poca literatura sobre la intersección entre los impedimentos relacionados con la raza y el envejecimiento.OBJETIVO: El objetivo era explorar las diferencias raciales en los subdominios de fragilidad y déficit geriátrico entre los pacientes con cáncer colorectal.DISEÑO: Estudio retrospectivo utilizando datos del registro Cancer and Aging Resilience Evaluation.AJUSTES: Un centro oncológico integral en el Sur Profundo.PACIENTES: Adultos mayores (≥60 años) con cáncer colorrectal de raza Negra o Blanca.PRINCIPALES MEDIDAS DE RESULTADO: Medida compuesta de fragilidad y subdominios de evaluación geriátrica de función física, estado funcional, quejas cognitivas, función psicológica y calidad de vida relacionada con la salud.RESULTADOS: De los 304 pacientes incluidos, el 21,7% (n = 66) eran negros y la edad media era de 69 años. Los pacientes negros vivían en áreas con un índice de vulnerabilidad social (SVI) más alto en comparación con los pacientes blancos (SVI 0,69 vs 0,49; p < 0,01) y con mayor frecuencia tenían apoyo social limitado (54,5% vs 34,9%; p = 0,01). Después de ajustar por edad, estadio del cáncer, comorbilidades y SVI, los pacientes de raza negra tenían una mayor tasa de fragilidad en comparación con los pacientes de raza blanca (ORa 3,77, IC del 95%: 1,76-8,18; p = 0,01). Además, los pacientes negros tenían más limitaciones físicas (caminar 1 cuadra: ORa 1,93, IC 95% 1,02-3,69; p = 0,04), limitaciones funcionales (actividades de la vida diaria: ORa 3,21, IC 95% 1,42-7,24; p = 0,01 ) y déficits en la calidad de vida relacionada con la salud (mala salud global autoinformada: ORa 2,45, IC 95% 1,23-5,13; p = 0,01). Las quejas cognitivas y las funciones psicológicas no difirieron según la raza (p > 0,05). Se mostraron hallazgos similares después de la estratificación por estadio I-III frente a IV.LIMITACIONES: Estudio retrospectivo en una sola institución.CONCLUSIONES: Entre los pacientes mayores con cáncer colorrectal, los pacientes negros tenían más probabilidades que los pacientes blancos de ser frágiles, observándose déficits específicamente en la función física, el estado funcional y la calidad de vida relacionada con la salud. La evaluación geriátrica puede proporcionar una herramienta importante para abordar las desigualdades raciales en el cáncer colorrectal.
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Affiliation(s)
- Mary G Smithson
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama
| | - M Chandler McLeod
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama
| | - Mustafa Al-Obaidi
- Institute for Cancer Outcomes and Survivorship, University of Alabama at Birmingham, Birmingham, Alabama
| | - Christian A Harmon
- Institute for Cancer Outcomes and Survivorship, University of Alabama at Birmingham, Birmingham, Alabama
| | - Arundhati Sawant
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama
| | - Karin M Hardiman
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama
- Department of Surgery, Birmingham Veterans Affairs Medical Center, Birmingham, Alabama
| | - Daniel I Chu
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama
| | - Smita Bhatia
- Institute for Cancer Outcomes and Survivorship, University of Alabama at Birmingham, Birmingham, Alabama
| | - Grant R Williams
- Institute for Cancer Outcomes and Survivorship, University of Alabama at Birmingham, Birmingham, Alabama
- Division of Hematology and Oncology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Robert H Hollis
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama
- Institute for Cancer Outcomes and Survivorship, University of Alabama at Birmingham, Birmingham, Alabama
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Smith BP, Jones BA, Cofer KD, Hollis RH, Shao C, Gleason L, Waldrop MG, Katta MH, Wood L, McLeod MC, Morris MS, Chu DI. Racial disparities in postoperative outcomes persist for patients with inflammatory bowel disease under a colorectal enhanced recovery program. Am J Surg 2023; 226:227-232. [PMID: 37120415 PMCID: PMC10524897 DOI: 10.1016/j.amjsurg.2023.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 03/29/2023] [Accepted: 04/16/2023] [Indexed: 05/01/2023]
Abstract
INTRODUCTION Enhanced recovery programs (ERPs) reduce racial disparities in surgical outcomes for general colorectal surgery populations. It is unclear, however, if disparities in IBD populations are impacted by ERPs. METHODS Retrospective study comparing IBD patients undergoing major elective colorectal operations before (2006-2014) and after (2015-2021) ERP implementation using ACS-NSQIP data. The primary outcome of length of stay (LOS) was analyzed by negative binomial regression, and secondary outcomes (complications and readmissions) by logistic regression. RESULTS Of 466 IBD patients, 47% were pre-ERP and 53% were ERP patients. In multivariable analysis stratified by ERP period, Black race was associated with increased odds of complications in the pre-ERP (OR 3.6, 95%CI 1.4-9.3) and ERP groups (OR 3.1 95%CI 1.3-7.6). Race was not a predictor of LOS or readmission in either group. High social vulnerability was associated with increased odds of readmission pre-ERP (OR 15.1, 95%CI 2.1-136.3), but this disparity was mitigated under ERPs (OR 1.4, 95%CI 0.4-5.6). CONCLUSION While ERPs mitigated some disparities by social vulnerability, racial disparities persist in IBD populations even under ERPs. Further work is needed to achieve surgical equity for IBD patients.
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Affiliation(s)
- Burkely P Smith
- University of Alabama at Birmingham, Department of Surgery, Division of Gastrointestinal Surgery, BDB 581, 1720 2nd Avenue South, Birmingham, AL, 35294, USA
| | - Bayley A Jones
- University of Alabama at Birmingham, Department of Surgery, Division of Gastrointestinal Surgery, BDB 581, 1720 2nd Avenue South, Birmingham, AL, 35294, USA
| | - Kevin D Cofer
- The Ohio State University, Department of Emergency Medicine, 750 Prior Hall, 376 W 10th Avenue, Columbus, OH, 43210, USA
| | - Robert H Hollis
- University of Alabama at Birmingham, Department of Surgery, Division of Gastrointestinal Surgery, BDB 581, 1720 2nd Avenue South, Birmingham, AL, 35294, USA
| | - Connie Shao
- University of Alabama at Birmingham, Department of Surgery, Division of Gastrointestinal Surgery, BDB 581, 1720 2nd Avenue South, Birmingham, AL, 35294, USA
| | - Lauren Gleason
- University of Alabama at Birmingham, Department of Surgery, Division of Gastrointestinal Surgery, BDB 581, 1720 2nd Avenue South, Birmingham, AL, 35294, USA
| | - Mary G Waldrop
- University of Alabama at Birmingham, Department of Surgery, Division of Gastrointestinal Surgery, BDB 581, 1720 2nd Avenue South, Birmingham, AL, 35294, USA
| | - Meghna H Katta
- University of Alabama at Birmingham, Department of Surgery, Division of Gastrointestinal Surgery, BDB 581, 1720 2nd Avenue South, Birmingham, AL, 35294, USA
| | - Lauren Wood
- University of Alabama at Birmingham, Department of Surgery, Division of Gastrointestinal Surgery, BDB 581, 1720 2nd Avenue South, Birmingham, AL, 35294, USA
| | - M Chandler McLeod
- University of Alabama at Birmingham, Department of Surgery, Division of Gastrointestinal Surgery, BDB 581, 1720 2nd Avenue South, Birmingham, AL, 35294, USA
| | - Melanie S Morris
- University of Alabama at Birmingham, Department of Surgery, Division of Gastrointestinal Surgery, BDB 581, 1720 2nd Avenue South, Birmingham, AL, 35294, USA
| | - Daniel I Chu
- University of Alabama at Birmingham, Department of Surgery, Division of Gastrointestinal Surgery, BDB 581, 1720 2nd Avenue South, Birmingham, AL, 35294, USA.
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11
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Reed RD, McLeod MC, MacLennan PA, Kumar V, Pittman SE, Maynor AG, Stanford LA, Baker GA, Schinstock CA, Silkensen JR, Roll GR, Segev DL, Orandi BJ, Lewis CE, Locke JE. Change in Body Mass Index and Attributable Risk of New-Onset Hypertension Among Obese Living Kidney Donors. Ann Surg 2023; 278:e115-e122. [PMID: 35946818 PMCID: PMC9911559 DOI: 10.1097/sla.0000000000005669] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To examine whether body mass index (BMI) changes modify the association between kidney donation and incident hypertension. BACKGROUND Obesity increases hypertension risk in both general and living kidney donor (LKD) populations. Donation-attributable risk in the context of obesity, and whether weight change modifies that risk, is unknown. METHODS Nested case-control study among 1558 adult LKDs (1976-2020) with obesity (median follow-up: 3.6 years; interquartile range: 2.0-9.4) and 3783 adults with obesity in the Coronary Artery Risk Development in Young Adults (CARDIA) and Atherosclerosis Risk in Communities (ARIC) studies (9.2 y; interquartile range: 5.3-15.8). Hypertension incidence was compared by donor status using conditional logistic regression, with BMI change investigated for effect modification. RESULTS Overall, LKDs and nondonors had similar hypertension incidence [incidence rate ratio (IRR): 1.16, 95% confidence interval (95% CI): 0.94-1.43, P =0.16], even after adjusting for BMI change (IRR: 1.25, 95% CI: 0.99-1.58, P =0.05). Although LKDs and nondonors who lost >5% BMI had comparable hypertension incidence (IRR: 0.78, 95% CI: 0.46-1.34, P =0.36), there was a significant interaction between donor and >5% BMI gain (multiplicative interaction IRR: 1.62, 95% CI: 1.15-2.29, P =0.006; relative excess risk due to interaction: 0.90, 95% CI: 0.24-1.56, P =0.007), such that LKDs who gained weight had higher hypertension incidence than similar nondonors (IRR: 1.83, 95% CI: 1.32-2.53, P <0.001). CONCLUSIONS Overall, LKDs and nondonors with obesity had similar hypertension incidence. Weight stability and loss were associated with similar hypertension incidence by donor status. However, LKDs who gained >5% saw increased hypertension incidence versus similar nondonors, providing support for counseling potential LKDs with obesity on weight management postdonation.
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Affiliation(s)
- Rhiannon D. Reed
- Comprehensive Transplant Institute, University of Alabama at Birmingham
| | | | - Paul A. MacLennan
- Comprehensive Transplant Institute, University of Alabama at Birmingham
| | - Vineeta Kumar
- Comprehensive Transplant Institute, University of Alabama at Birmingham
| | - Sydney E. Pittman
- Comprehensive Transplant Institute, University of Alabama at Birmingham
| | - Andrew G. Maynor
- Comprehensive Transplant Institute, University of Alabama at Birmingham
| | - Luke A. Stanford
- Comprehensive Transplant Institute, University of Alabama at Birmingham
| | - Gavin A. Baker
- Comprehensive Transplant Institute, University of Alabama at Birmingham
| | | | | | - Garrett R. Roll
- Division of Transplant, Department of Surgery, University of California San Francisco
| | | | - Babak J. Orandi
- Comprehensive Transplant Institute, University of Alabama at Birmingham
| | - Cora E. Lewis
- Department of Epidemiology, School of Public Health, University of Alabama at Birmingham
| | - Jayme E. Locke
- Comprehensive Transplant Institute, University of Alabama at Birmingham
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Gross EG, Laskay NMB, Mooney J, McLeod MC, Atchley TJ, Estevez-Ordonez D, Godzik J. Morbid obesity increases length of surgery in elective anterior cervical discectomy and fusion procedures but not readmission or reoperation rates: A cohort study. World Neurosurg 2023; 173:e830-e837. [PMID: 36914028 DOI: 10.1016/j.wneu.2023.03.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 03/07/2023] [Accepted: 03/08/2023] [Indexed: 03/15/2023]
Abstract
BACKGROUND As the obesity epidemic grows, the number of morbidly obese patients undergoing anterior cervical discectomy and fusion (ACDF) continues to climb. Despite obesity's association with perioperative complications in anterior cervical surgery, morbid obesity's impact on ACDF complications remains controversial, and studies examining morbidly obese cohorts are limited. METHODS Single-institution, retrospective analysis of patients undergoing ACDF from September 2010 to February 2022. Demographic, intraoperative, and postoperative data were collected via review of the electronic medical record. Patients were categorized as non-obese [body mass index (BMI) < 30], obese (BMI 30-39.9), or morbidly obese (BMI ≥ 40). The associations of BMI class to discharge disposition, length of surgery, and length of stay (LOS) were assessed using multivariable logistic regression, multivariable linear regression, and negative binomial regression, respectively. RESULTS A total of 670 patients undergoing single or multilevel ACDF were included, comprised of 413 (61.6%) non-obese, 226 (33.7%) obese, and 31 (4.6%) morbidly obese patients. BMI class was associated with prior history of deep venous thrombosis (p < 0.01), pulmonary thromboembolism (p < 0.05), and diabetes mellitus (p < 0.001). In bivariate analysis, there was no significant association between BMI class and reoperation or readmission rates at 30, 60 or 365 days postoperatively. In multivariable analysis, greater BMI class was associated with increased length of surgery (p = 0.03) but not LOS or discharge disposition. CONCLUSIONS For patients undergoing ACDF, greater BMI class was associated with increased length of surgery but not reoperation rate, readmission rate, LOS, or discharge disposition.
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Affiliation(s)
- Evan G Gross
- Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Nicholas M B Laskay
- Department of Neurological Surgery, University of Alabama at Birmingham, Birmingham, Alabama, USA.
| | - James Mooney
- Department of Neurological Surgery, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - M Chandler McLeod
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Travis J Atchley
- Department of Neurological Surgery, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | | | - Jakub Godzik
- Department of Neurological Surgery, University of Alabama at Birmingham, Birmingham, Alabama, USA
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13
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Orandi BJ, McLeod MC, MacLennan PA, Lee WM, Fontana RJ, Karvellas CJ, McGuire BM, Lewis CE, Terrault NM, Locke JE. Association of FDA Mandate Limiting Acetaminophen (Paracetamol) in Prescription Combination Opioid Products and Subsequent Hospitalizations and Acute Liver Failure. JAMA 2023; 329:735-744. [PMID: 36881033 PMCID: PMC9993184 DOI: 10.1001/jama.2023.1080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 01/31/2023] [Indexed: 03/08/2023]
Abstract
Importance In January 2011, the US Food and Drug Administration (FDA) announced a mandate to limit acetaminophen (paracetamol) to 325 mg/tablet in combination acetaminophen and opioid medications, with manufacturer compliance required by March 2014. Objective To assess the odds of hospitalization and the proportion of acute liver failure (ALF) cases with acetaminophen and opioid toxicity prior to and after the mandate. Design, Setting, and Participants This interrupted time-series analysis used hospitalization data from 2007-2019 involving ICD-9/ICD-10 codes consistent with both acetaminophen and opioid toxicity from the National Inpatient Sample (NIS), a large US hospitalization database, and ALF cases from 1998-2019 involving acetaminophen and opioid products from the Acute Liver Failure Study Group (ALFSG), a cohort of 32 US medical centers. For comparison, hospitalizations and ALF cases consistent with acetaminophen toxicity alone were extracted from the NIS and ALFSG. Exposures Time prior to and after the FDA mandate limiting acetaminophen to 325 mg in combination acetaminophen and opioid products. Main Outcomes and Measures Odds of hospitalization involving acetaminophen and opioid toxicity and percentage of ALF cases from acetaminophen and opioid products prior to and after the mandate. Results In the NIS, among 474 047 585 hospitalizations from Q1 2007 through Q4 2019, there were 39 606 hospitalizations involving acetaminophen and opioid toxicity; 66.8% of cases were among women; median age, 42.2 (IQR, 28.4-54.1). In the ALFSG, from Q1 1998 through Q3 2019, there were a total of 2631 ALF cases, of which 465 involved acetaminophen and opioid toxicity; 85.4% women; median age, 39.0 (IQR, 32.0-47.0). The predicted incidence of hospitalizations 1 day prior to the FDA announcement was 12.2 cases/100 000 hospitalizations (95% CI, 11.0-13.4); by Q4 2019, it was 4.4/100 000 hospitalizations (95% CI, 4.1-4.7) (absolute difference, 7.8/100 000 [95% CI, 6.6-9.0]; P < .001). The odds of hospitalizations with acetaminophen and opioid toxicity increased 11%/y prior to the announcement (odds ratio [OR], 1.11 [95% CI, 1.06-1.15]) and decreased 11%/y after the announcement (OR, 0.89 [95% CI, 0.88-0.90]). The predicted percentage of ALF cases involving acetaminophen and opioid toxicity 1 day prior to the FDA announcement was 27.4% (95% CI, 23.3%-31.9%); by Q3 2019, it was 5.3% (95% CI, 3.1%-8.8%) (absolute difference, 21.8% [95% CI, 15.5%-32.4%]; P < .001). The percentage of ALF cases involving acetaminophen and opioid toxicity increased 7% per year prior to the announcement (OR, 1.07 [95% CI, 1.03-1.1]; P < .001) and decreased 16% per year after the announcement (OR, 0.84 [95% CI, 0.77-0.92]; P < .001). Sensitivity analyses confirmed these findings. Conclusions and Relevance The FDA mandate limiting acetaminophen dosage to 325 mg/tablet in prescription acetaminophen and opioid products was associated with a statistically significant decrease in the yearly rate of hospitalizations and proportion per year of ALF cases involving acetaminophen and opioid toxicity.
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Affiliation(s)
- Babak J. Orandi
- University of Alabama at Birmingham Heersink School of Medicine
- Joan & Sanford Weill Medical College of Cornell University, New York, New York
| | | | | | - William M. Lee
- University of Texas Southwestern Medical Center at Dallas
| | | | | | | | - Cora E. Lewis
- University of Alabama at Birmingham School of Public Health
| | - Norah M. Terrault
- University of Southern California Keck School of Medicine, Los Angeles
| | - Jayme E. Locke
- University of Alabama at Birmingham Heersink School of Medicine
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Wang R, Saad F, McLeod MC, Kew C, Agarwal G, Wille K, Locke JE, Chen H, Ong S. Making the Cut: Parathyroidectomy Before or After Kidney Transplantation? World J Surg 2023; 47:319-329. [PMID: 36239741 DOI: 10.1007/s00268-022-06757-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/03/2022] [Indexed: 01/04/2023]
Abstract
BACKGROUND Hyperparathyroidism is common in patients with end-stage kidney disease and may persist after kidney transplantation (KT). Parathyroidectomy (PTx) is curative, but whether PTx should be performed before or after KT remains controversial. There is concern that PTx can adversely affect renal allograft function if performed post-KT and result in persistent hypocalcemia. This study evaluated outcomes and postoperative complications of PTx before and after KT at our institution. METHODS We performed a retrospective review of patients at our center (1/2012-2/2019) who had PTx either pre-KT or post-KT. Data on patient demographics, surgical outcomes, and postoperative complications of PTx were collected. RESULTS Ninety-eight patients were included in this study, with 23 patients undergoing PTx before KT and 75 after KT. The length of follow-up after KT was 67.7 ± 25.5 months. In post-KT PTx patients, 30-day allograft function was unchanged after PTx. Calcium oxalate and phosphate crystals were less common on allograft biopsies in pre-KT PTx patients (10.0% vs. 34.8%, p = 0.038). Patients in the pre-KT group required more calcium supplementation after PTx than the post-KT group (p < 0.001). At one-year post-PTx, 17 (19.1%) patients required > 1000 mg elemental calcium per day and 7 (7.9%) patients required > 2000 mg/day. There was no difference in surgical success or postoperative complications between the two groups. CONCLUSIONS Parathyroidectomy before or after kidney transplantation does not adversely affect allograft function. The incidence of persistent hypocalcemia was low. Parathyroidectomy is safe and effective either before or after kidney transplantation.
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Affiliation(s)
- Rongzhi Wang
- Department of Surgery, The University of Alabama at Birmingham, 1808 7th Avenue South, Birmingham, AL, 35233, USA
| | - Faaiz Saad
- School of Medicine, The University of Alabama at Birmingham, 1670 University Blvd, Birmingham, AL, 35233, USA
| | - M Chandler McLeod
- Department of Surgery, The University of Alabama at Birmingham, 1808 7th Avenue South, Birmingham, AL, 35233, USA
| | - Clifton Kew
- Department of Medicine, The University of Alabama at Birmingham, 1808 7th Avenue South, Birmingham, AL, 35233, USA
| | - Gaurav Agarwal
- Department of Medicine, The University of Alabama at Birmingham, 1808 7th Avenue South, Birmingham, AL, 35233, USA
| | - Keith Wille
- Department of Medicine, The University of Alabama at Birmingham, 1808 7th Avenue South, Birmingham, AL, 35233, USA
| | - Jayme E Locke
- Department of Surgery, The University of Alabama at Birmingham, 1808 7th Avenue South, Birmingham, AL, 35233, USA
| | - Herbert Chen
- Department of Surgery, The University of Alabama at Birmingham, 1808 7th Avenue South, Birmingham, AL, 35233, USA
| | - Song Ong
- Department of Medicine, The University of Alabama at Birmingham, 1808 7th Avenue South, Birmingham, AL, 35233, USA.
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15
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Gillis A, Obiarinze R, McLeod MC, Zmijewski P, Chen H, Fazendin J, Lindeman B. Time to Symptom Resolution After Total Thyroidectomy for Graves' Disease. J Surg Res 2023; 281:185-191. [PMID: 36179596 PMCID: PMC10496743 DOI: 10.1016/j.jss.2022.07.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 06/21/2022] [Accepted: 07/28/2022] [Indexed: 01/31/2023]
Abstract
INTRODUCTION Total thyroidectomy (TT) has been shown to be a safe and effective treatment for Graves' disease. However, the time course for improvement of symptoms has not been defined. METHODS With an institutional review board approval, we prospectively gathered survey data of all patients (n = 79) undergoing TT for Graves' disease at a single institution from 2019 to 2021. After informed consent was obtained, patients completed surveys preoperatively and at 2 wk followed by monthly postoperative visits/phone calls. Patient demographics and survey results were collected and analyzed. Symptom recovery time was evaluated using Kaplan-Meier analysis. RESULTS A total of 50 patients completed the survey on postoperative follow-up (response rate 63%). Average age was 38 y (range 12-80 y) and 88% of patients were female. The most common preoperative symptoms were fatigue (90%) and heat/cold intolerance (88%). Tremor (median time to resolution: 1 wk; interquartile range [IQR] 1-3), diarrhea (median 1 wk [IQR 1-3]), and palpitations (median 1 wk [IQR 1-3]) resolved the most rapidly followed by eye symptoms (median 3 wk [IQR 1-6]), heat/cold intolerance (median 3 wk [IQR 3-30]), memory deficits (median 3 wk [IQR 1-undefined]), and fatigue (median: 3 wk [IQR 1-14]). There were no significant differences in time to resolution of symptoms by gender or age (less than versus 40 y and older). Those with uncontrolled Graves' had more severe symptoms but no difference in time to resolution from the euthyroid Graves' patients. CONCLUSIONS Many Graves' disease symptoms improve rapidly following TT, with a median time to improvement of less than 1 mo.
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Affiliation(s)
- Andrea Gillis
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama.
| | - Ruth Obiarinze
- Department of Surgery, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire
| | - M Chandler McLeod
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama
| | - Polina Zmijewski
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama
| | - Herbert Chen
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama
| | - Jessica Fazendin
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama
| | - Brenessa Lindeman
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama
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Killian AC, Reed RD, McLeod MC, MacLennan PA, Kumar V, Pittman SE, Maynor AG, Stanford LA, Baker GA, Schinstock CA, Silkensen JR, Roll GR, Segev DL, Orandi BJ, Lewis CE, Locke JE. Diabetes-free survival among living kidney donors and non-donors with obesity: A longitudinal cohort study. PLoS One 2022; 17:e0276882. [PMID: 36399462 PMCID: PMC9674148 DOI: 10.1371/journal.pone.0276882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 10/13/2022] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND Approval of living kidney donors (LKD) with end-stage kidney disease (ESKD) risk factors, such as obesity, has increased. While lifetime ESKD development data are lacking, the study of intermediate outcomes such as diabetes is critical for LKD safety. Donation-attributable diabetes risk among persons with obesity remains unknown. The purpose of this study was to evaluate 10-year diabetes-free survival among LKDs and non-donors with obesity. METHODS This longitudinal cohort study identified adult, LKDs (1976-2020) from 42 US transplant centers and non-donors from the Coronary Artery Risk Development in Young Adults (1985-1986) and the Atherosclerosis Risk in Communities (1987-1989) studies with body mass index ≥30 kg/m2. LKDs were matched to non-donors on baseline characteristics (age, sex, race, body mass index, systolic and diastolic blood pressure) plus diabetes-specific risk factors (family history of diabetes, impaired fasting glucose, smoking history). Accelerated failure time models were utilized to evaluate 10-year diabetes-free survival. FINDINGS Among 3464 participants, 1119 (32%) were LKDs and 2345 (68%) were non-donors. After matching on baseline characteristics plus diabetes-specific risk factors, 4% (7/165) LKDs and 9% (15/165) non-donors developed diabetes (median follow-up time 8.5 (IQR: 5.6-10.0) and 9.1 (IQR: 5.9-10.0) years, respectively). While not significant, LKDs were estimated to live diabetes-free 2 times longer than non-donors (estimate 1.91; 95% CI: 0.79-4.64, p = 0.15). CONCLUSIONS LKDs with obesity trended toward living longer diabetes-free than non-donors with obesity, suggesting within the decade following donation there was no increased diabetes risk among LKDs. Further work is needed to evaluate donation-attributable diabetes risk long-term.
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Affiliation(s)
- A. Cozette Killian
- Comprehensive Transplant Institute, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Rhiannon D. Reed
- Comprehensive Transplant Institute, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - M. Chandler McLeod
- Comprehensive Transplant Institute, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Paul A. MacLennan
- Comprehensive Transplant Institute, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Vineeta Kumar
- Comprehensive Transplant Institute, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Sydney E. Pittman
- Comprehensive Transplant Institute, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Andrew G. Maynor
- Comprehensive Transplant Institute, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Luke A. Stanford
- Comprehensive Transplant Institute, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Gavin A. Baker
- Comprehensive Transplant Institute, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Carrie A. Schinstock
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota, United States of America
| | - John R. Silkensen
- Department of Medicine, Hennepin County Medical Center, Minneapolis, Minnesota, United States of America
| | - Garrett R. Roll
- Division of Transplant, Department of Surgery, University of California San Francisco, San Francisco, CA, United States of America
| | - Dorry L. Segev
- Department of Surgery, New York University Grossman School of Medicine, New York, New York, United States of America
| | - Babak J. Orandi
- Comprehensive Transplant Institute, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Cora E. Lewis
- Department of Epidemiology, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, United States of America
| | - Jayme E. Locke
- Comprehensive Transplant Institute, University of Alabama at Birmingham, Birmingham, AL, United States of America
- * E-mail:
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Killian AC, Carter AJ, Reed RD, Shelton BA, Qu H, McLeod MC, Orandi BJ, Cannon RM, Anderson D, MacLennan PA, Kumar V, Hanaway M, Locke JE. Greater community vulnerability is associated with poor living donor navigator program fidelity. Surgery 2022; 172:997-1004. [PMID: 35831221 PMCID: PMC9633042 DOI: 10.1016/j.surg.2022.04.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 04/19/2022] [Accepted: 04/20/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND Community-level factors contribute to living donor kidney transplantation disparities but may also influence the interventions aimed to mitigate these disparities. The Living Donor Navigator Program was designed to separate the advocacy role from the patient in need of transplantation-friends/family are encouraged to participate as the patients' advocates to identify living donors, though some of the patients participate alone as self-advocates. Self-advocates have a lower living donor kidney transplantation likelihood compared to the patients with an advocate. We sought to evaluate the relationship between the patients' community-level vulnerability and living donor navigator self-advocacy as a surrogate for program fidelity. METHODS This single-center, retrospective study included 110 Living Donor Navigator participants (April 2017-June 2019). Program fidelity was assessed using the participants' advocacy status. Measures of community vulnerability were obtained from the Centers for Disease Control and Prevention Social Vulnerability Index. Modified Poisson regression was used to evaluate the association between community-level vulnerability and living donor navigator self-advocacy. RESULTS Of the 110 participants, 19% (n = 21) were self-advocates. For every 10% increase in community-level vulnerability, patients had 17% higher risk of self-advocacy (adjusted relative risk 1.17, 95% confidence interval: 1.03-1.32, P = .01). Living in areas with greater unemployment (adjusted relative risk: 1.18, 95% confidence interval: 1.04-1.33, P = .01), single-parent households (adjusted relative risk: 1.23, 95% confidence interval: 1.06-1.42, P = .006), minority population (adjusted relative risk: 1.30, 95% confidence interval: 1.04-1.55, P = .02), or no-vehicle households (adjusted relative risk: 1.17, 95% confidence interval: 1.02-1.35, P = .02) were associated with increased risk of self-advocacy. CONCLUSION Having a greater community-level vulnerability was associated with poor Living Donor Navigator Program fidelity. The potential barriers identified using the Social Vulnerability Index may direct resource allocation and program refinement to optimize program fidelity and efficacy for all participants.
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Affiliation(s)
- A Cozette Killian
- University of Alabama Comprehensive Transplant Institute, Birmingham, AL. https://twitter.com/CozetteKale
| | - Alexis J Carter
- University of Alabama Comprehensive Transplant Institute, Birmingham, AL. https://twitter.com/carteraj21
| | - Rhiannon D Reed
- University of Alabama Comprehensive Transplant Institute, Birmingham, AL. https://twitter.com/rhiruns
| | - Brittany A Shelton
- University of Alabama Comprehensive Transplant Institute, Birmingham, AL
| | - Haiyan Qu
- University of Alabama Comprehensive Transplant Institute, Birmingham, AL
| | - M Chandler McLeod
- University of Alabama Comprehensive Transplant Institute, Birmingham, AL
| | - Babak J Orandi
- University of Alabama Comprehensive Transplant Institute, Birmingham, AL
| | - Robert M Cannon
- University of Alabama Comprehensive Transplant Institute, Birmingham, AL
| | - Douglas Anderson
- University of Alabama Comprehensive Transplant Institute, Birmingham, AL
| | - Paul A MacLennan
- University of Alabama Comprehensive Transplant Institute, Birmingham, AL
| | - Vineeta Kumar
- University of Alabama Comprehensive Transplant Institute, Birmingham, AL
| | - Michael Hanaway
- University of Alabama Comprehensive Transplant Institute, Birmingham, AL
| | - Jayme E Locke
- University of Alabama Comprehensive Transplant Institute, Birmingham, AL.
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18
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Gutnik L, Bleicher J, Davis A, McLeod MC, McCrum M, Scaife C. American Indian/Alaska native access to colorectal cancer screening: Does gastroenterologist density matter? Am J Surg 2022; 224:965-970. [PMID: 35513914 DOI: 10.1016/j.amjsurg.2022.04.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 04/12/2022] [Accepted: 04/19/2022] [Indexed: 11/26/2022]
Abstract
BACKGROUND American Indians/Alaska Natives (AI/AN) receive less colorectal cancer (CRC) screening than other populations. Using gastroenterologist (GI) locations as a measure of colonoscopy access, we correlate GI density and AI/AN CRC screening rates. METHODS We identified GIs from the 2016 National Provider Identifier registry, and calculated GI density per 100,000 people. We identified screening, demographic, and socioeconomic variables from the 2016 Behavioral Risk Factor Surveillance System Survey. GI density and CRC screening rates were analyzed with Multivariable Poisson regression. RESULTS In states with GI Density greater than 3.98/100,000, odds of AI/AN CRC screening are 1.27-1.37 times higher than in states below this threshold (p < 0.036). CONCLUSIONS GI density has a limited association on CRC screening, with decrease impact beyond threshold of 3.98 GI/100,000. Minimal access to GIs is important in improving AI/AN CRC screening; however, further research is required to elucidate the most critical factors contributing to CRC screening.
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Affiliation(s)
- Lily Gutnik
- University of Alabama at Birmingham, Department of Surgery, 1807 Seventh Ave South, BDB 515, Birmingham, AL, 35233, USA; University of Utah, Department of Surgery, 30 N 1900 E, Salt Lake City, UT, 84132, USA.
| | - Josh Bleicher
- University of Utah, Department of Surgery, 30 N 1900 E, Salt Lake City, UT, 84132, USA.
| | - Andrea Davis
- University of Utah, Department of Geography, 260 Central Campus Dr #4625, Salt Lake City, UT, 84112, USA.
| | - M Chandler McLeod
- University of Alabama at Birmingham, Department of Surgery, 1807 Seventh Ave South, BDB 515, Birmingham, AL, 35233, USA.
| | - Marta McCrum
- University of Utah, Department of Surgery, 30 N 1900 E, Salt Lake City, UT, 84132, USA.
| | - Courtney Scaife
- University of Utah, Department of Surgery, 30 N 1900 E, Salt Lake City, UT, 84132, USA; Huntsman Cancer Institute at the University of Utah, Division of Surgical Oncology, 2000 Cir of Hope Dr #1950, Salt Lake City, UT, 84112, USA.
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19
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Mooney J, Pate J, Cummins I, McLeod MC, Gould S. Effects of prior concussion on symptom severity and recovery time in acute youth concussion. J Neurosurg Pediatr 2022; 30:1-9. [PMID: 35901756 DOI: 10.3171/2022.5.peds2248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 05/18/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Many studies have identified factors associated with increased symptom burden and prolonged recovery after pediatric and adolescent concussion. Few have systematically examined the effects of prior concussion on these outcomes in patients with concussion due to any mechanism. An improved understanding of the short- and long-term effects of a multiple concussion history will improve counseling and management of this subgroup of patients. METHODS A retrospective review of adolescent and young adult acute concussion patients presenting to the multidisciplinary concussion clinic between 2018 and 2019 was conducted at a single center. Patient demographic data, medical history including prior concussion, initial symptom severity score (SSS), injury mechanisms, and recovery times were collected. Univariate and multivariable analyses were conducted to identify associations of history of prior concussion and patient and injury characteristics with symptom score and recovery time. RESULTS A total of 266 patients with an average age of 15.4 years (age range 13-27 years) were included. Prior concussion was reported in 35% of patients. The number of prior concussions per patient was not significantly associated with presenting symptom severity, recovery time, or recovery within 28 days. Male sex and sports-related concussion (SRC) were associated with lower presenting SSS and shorter recovery time on univariate but not multivariable analysis. However, compared to non-sport concussion mechanisms, SRC was associated with 2.3 times higher odds of recovery within 28 days (p = 0.04). A history of psychiatric disorders was associated with higher SSS in univariate analysis and longer recovery time in univariate and multivariable analyses. Multivariable log-linear regression also demonstrated 5 times lower odds of recovery within 28 days for those with a psychiatric history. CONCLUSIONS The results of this study demonstrated that an increasing number of prior concussions was associated with a trend toward higher presenting SSS after youth acute concussion but did not show a significant association with recovery time or delayed (> 28 days) recovery. Presence of psychiatric history was found to be significantly associated with longer recovery and lower odds of early (≤ 28 days) recovery. Future prospective, long-term, and systematic study is necessary to determine the optimal counseling and management of adolescent and young adult patients with a history of multiple concussions.
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Affiliation(s)
| | | | | | | | - Sara Gould
- 4Department of Orthopedic Surgery, University of Alabama at Birmingham, Alabama
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20
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Smithson M, McLeod MC, Theiss L, Shao C, Kennedy G, Hollis R, Chu DI, Hardiman KM. Ileostomy Patients Using Patient Engagement Technology Experience Decreased Length of Stay. J Gastrointest Surg 2022; 26:635-642. [PMID: 34618324 PMCID: PMC9217180 DOI: 10.1007/s11605-021-05158-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 09/09/2021] [Indexed: 01/31/2023]
Abstract
Patients who undergo colorectal surgery, particularly, construction of a new ileostomy, are known to have longer length of stay (LOS) and increased readmissions. With the increased availability of patient engagement technology (PET), we hypothesized that because PET facilitates education before and after surgery, ileostomy patients who used PET would have decreased LOS without increasing readmissions. Variables were obtained from the National Surgical Quality Improvement Program (NSQIP) database for patients undergoing ileostomy construction. Study patients were categorized into three groups: pre-PET (patients prior to PET), non-PET (patients who did not use PET), and PET users (patients who used PET). Univariate analysis of patient and surgical characteristics, LOS, ED visits, and readmissions and multivariable modeling of potential predictors of LOS were performed. There were 106 patients in the pre-PET, 51 in the PET, and 108 in the non-PET and cohorts were similar except pre-op diagnosis. Length of stay was lower for the PET cohort (p = 0.0001), with no significant difference in readmission or ED visits. On multivariable analysis, we identified the PET cohort as an independent predictor of shorter LOS relative to non-PET and pre-PET (p = 0.007 and p = 0.02, respectively). Similarly, patients had significantly shorter LOS who had a diagnosis of neoplasm as compared to IBD (p = 0.03). Hypertension requiring medication (p = 0.001) and Black race relative to White race (p = 0.002) were independent predictors of longer LOS. In this study of ileostomy patients, we have shown that use of PET is an independent predictor of decreased LOS without increased ED visits or readmissions.
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Affiliation(s)
- Mary Smithson
- Department of Surgery, University of Alabama at Birmingham, KB 428, 1922 7thAvenue South, Birmingham, AL 35294-0016, USA
| | - M. Chandler McLeod
- Department of Surgery, University of Alabama at Birmingham, KB 428, 1922 7thAvenue South, Birmingham, AL 35294-0016, USA
| | - Lauren Theiss
- Department of Surgery, University of Alabama at Birmingham, KB 428, 1922 7thAvenue South, Birmingham, AL 35294-0016, USA
| | - Connie Shao
- Department of Surgery, University of Alabama at Birmingham, KB 428, 1922 7thAvenue South, Birmingham, AL 35294-0016, USA
| | - Gregory Kennedy
- Department of Surgery, University of Alabama at Birmingham, KB 428, 1922 7thAvenue South, Birmingham, AL 35294-0016, USA
| | - Robert Hollis
- Department of Surgery, University of Alabama at Birmingham, KB 428, 1922 7thAvenue South, Birmingham, AL 35294-0016, USA
| | - Daniel I. Chu
- Department of Surgery, University of Alabama at Birmingham, KB 428, 1922 7thAvenue South, Birmingham, AL 35294-0016, USA
| | - Karin M. Hardiman
- Department of Surgery, University of Alabama at Birmingham, KB 428, 1922 7thAvenue South, Birmingham, AL 35294-0016, USA
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21
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Smithson M, Irwin RK, Williams G, McLeod MC, Choi EK, Ganguly A, Pepple A, Cho CS, Willey CD, Leopold J, Hardiman KM. Inhibition of DNA-PK may improve response to neoadjuvant chemoradiotherapy in rectal cancer. Neoplasia 2022; 25:53-61. [PMID: 35168148 PMCID: PMC8850661 DOI: 10.1016/j.neo.2022.01.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Accepted: 01/25/2022] [Indexed: 12/31/2022]
Abstract
Treatment of locally advanced rectal cancer includes chemoradiation and surgery, but patient response to treatment is variable. Patients who have a complete response have improved outcomes; therefore, there is a critical need to identify mechanisms of resistance to circumvent them. DNA-PK is involved in the repair of DNA double-strand breaks caused by radiation, which we found to be increased in rectal cancer after treatment. We hypothesized that inhibiting this complex with a DNA-PK inhibitor, Peposertib (M3814), would improve treatment response. We assessed pDNA-PK in a rectal cancer cell line and mouse model utilizing western blotting, viability assays, γH2AX staining, and treatment response. The three treatment groups were: standard of care (SOC) (5-fluorouracil (5FU) with radiation), M3814 with radiation, and M3814 with SOC. SOC treatment of rectal cancer cells increased pDNA-PK protein and increased γH2AX foci, but this was abrogated by the addition of M3814. Mice with CT26 tumors treated with M3814 with SOC did not differ in average tumor size but individual tumor response varied. The clinical complete response rate improved significantly with the addition of M3814 but pathological complete response did not. We investigated alterations in DNA repair and found that Kap1 and pATM are increased after M3814 addition suggesting this may mediate resistance. When the DNA-PK inhibitor, M3814, is combined with SOC treatment, response improved in some rectal cancer models but an increase in other repair mechanisms likely diminishes the effect. A clinical trial is ongoing to further explore the role of DNA-PK inhibition in rectal cancer treatment.
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22
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Smithson M, Irwin R, Williams G, Alexander KL, Smythies LE, Nearing M, McLeod MC, Al Diffalha S, Bellis SL, Hardiman KM. Sialyltransferase ST6GAL-1 mediates resistance to chemoradiation in rectal cancer. J Biol Chem 2022; 298:101594. [PMID: 35041825 PMCID: PMC8857646 DOI: 10.1016/j.jbc.2022.101594] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Revised: 01/08/2022] [Accepted: 01/10/2022] [Indexed: 12/14/2022] Open
Abstract
Locally advanced rectal cancer is typically treated with chemoradiotherapy followed by surgery. Most patients do not display a complete response to chemoradiotherapy, but resistance mechanisms are poorly understood. ST6GAL-1 is a sialyltransferase that adds the negatively charged sugar, sialic acid (Sia), to cell surface proteins in the Golgi, altering their function. We therefore hypothesized that ST6GAL-1 could mediate resistance to chemoradiation in rectal cancer by inhibiting apoptosis. Patient-derived xenograft and organoid models of rectal cancer and rectal cancer cell lines were assessed for ST6GAL-1 protein with and without chemoradiation treatment. ST6GAL-1 mRNA was assessed in untreated human rectal adenocarcinoma by PCR assays. Samples were further assessed by Western blotting, Caspase-Glo apoptosis assays, and colony formation assays. The presence of functional ST6GAL-1 was assessed via flow cytometry using the Sambucus nigra lectin, which specifically binds cell surface α2,6-linked Sia, and via lectin precipitation. In patient-derived xenograft models of rectal cancer, we found that ST6GAL-1 protein was increased after chemoradiation in a subset of samples. Rectal cancer cell lines demonstrated increased ST6GAL-1 protein and cell surface Sia after chemoradiation. ST6GAL-1 was also increased in rectal cancer organoids after treatment. ST6GAL-1 knockdown in rectal cancer cell lines resulted in increased apoptosis and decreased survival after treatment. We concluded that ST6GAL-1 promotes resistance to chemoradiotherapy by inhibiting apoptosis in rectal cancer cell lines. More research will be needed to further elucidate the importance and mechanism of ST6GAL-1-mediated resistance.
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Affiliation(s)
- Mary Smithson
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Al 35294.
| | - Regina Irwin
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Al 35294
| | - Gregory Williams
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Al 35294
| | - Katie L Alexander
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Al 35294
| | - Lesley E Smythies
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Al 35294
| | - Marie Nearing
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Al 35294
| | - M Chandler McLeod
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Al 35294
| | - Sameer Al Diffalha
- Department of Pathology, University of Alabama at Birmingham, Birmingham, Al 35294
| | - Susan L Bellis
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, Al 35294
| | - Karin M Hardiman
- Department of Surgery, University of Alabama at Birmingham, Birmingham, Al 35294; Department of Surgery, Birmingham Veterans Affairs Medical Center, Birmingham, Al 35233
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23
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Shao CC, McLeod MC, Gleason LT, Dos Santos Marques IC, Chu DI, Wallace EL, Fouad MN, Reddy S. OUP accepted manuscript. Oncologist 2022; 27:555-564. [PMID: 35348793 PMCID: PMC9255978 DOI: 10.1093/oncolo/oyac046] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 01/14/2022] [Indexed: 11/21/2022] Open
Abstract
Background Telemedicine use has increased significantly during the COVID-19 pandemic. It remains unclear if its rapid growth exacerbates disparities in healthcare access. We aimed to characterize telemedicine use among a large oncology population in the Deep South during the COVID-19 pandemic. Materials and Methods A retrospective cohort study was performed at the only National Cancer Institute designated-cancer center in Alabama March 2020 to December 2020. With a diverse (26.5% Black, 61% rural) population, this southeastern demographic uniquely reflects historically vulnerable populations. All non-procedural visits at the cancer center from March to December 2020 were included in this study excluding those with a department that had fewer than 100 visits during this time period. Patient and clinic level characteristics were analyzed using t-test and Chi-square to compare characteristics between visit types (in-person versus telemedicine, and video versus audio within telemedicine). Generalized estimating equations were used to identify independent factors associated with telemedicine use and type of telemedicine use. Results There were 50 519 visits and most were in-person (81.3%). Among telemedicine visits, most were phone based (58.3%). Black race and male sex predicted in-person visits. Telemedicine visits were less likely to have video among patients who were Black, older, male, publicly insured, and from lower income areas. Conclusions Telemedicine use, specifically with video, is significantly lower among historically vulnerable populations. Understanding barriers to telemedicine use and preferred modalities of communication among different populations will help inform insurance reimbursement and interventions at different socioecological levels to ensure the continued evolution of telemedicine is equitable.
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Affiliation(s)
- Connie C Shao
- University of Alabama at Birmingham Department of Surgery, Birmingham, AL, USA
| | - M Chandler McLeod
- University of Alabama at Birmingham Department of Surgery, Birmingham, AL, USA
| | - Lauren T Gleason
- University of Alabama at Birmingham Department of Surgery, Birmingham, AL, USA
| | | | - Daniel I Chu
- University of Alabama at Birmingham Department of Surgery, Birmingham, AL, USA
| | - Eric L Wallace
- University of Alabama at Birmingham Department of Medicine, Birmingham, AL, USA
| | - Mona N Fouad
- University of Alabama at Birmingham Department of Medicine, Birmingham, AL, USA
| | - Sushanth Reddy
- Corresponding author: Sushanth Reddy, University of Alabama at Birmingham Department of Surgery, 1808 7th Avenue S BDB 202, Birmingham, AL 35233, USA.
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Killian AC, Shelton B, MacLennan P, McLeod MC, Carter A, Reed R, Qu H, Orandi B, Kumar V, Sawinski D, Locke JE. Evaluation of Community-Level Vulnerability and Racial Disparities in Living Donor Kidney Transplant. JAMA Surg 2021; 156:1120-1129. [PMID: 34524392 PMCID: PMC8444059 DOI: 10.1001/jamasurg.2021.4410] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 07/11/2021] [Indexed: 11/14/2022]
Abstract
Importance Living donor kidney transplant (LDKT) is the ideal treatment for end-stage kidney disease, but racial disparities in LDKT have increased over the last 2 decades. Recipient clinical and social factors do not account for LDKT racial inequities, although comprehensive measures of community-level vulnerability have not been assessed. Objective To determine if racial disparities persist in LDKT independent of community-level vulnerability. Design, Setting, and Participants This retrospective, multicenter, cross-sectional study included data from 19 287 adult kidney-only transplant recipients in the Scientific Registry of Transplant Recipients. The study included individuals who underwent transplant between January 1 and December 31, 2018. Exposures Recipient race and the 2018 US Centers for Disease Control and Prevention Social Vulnerability Index (SVI). Census tract-level SVI data were linked to census tracts within each recipient zip code. The median SVI measure among the census tracts within a zip code was used to describe community-level vulnerability. Main Outcomes and Measures Kidney transplant donor type (deceased vs living). Modified Poisson regression was used to evaluate the association between SVI and LDKT, and to estimate LDKT likelihood among races, independent of community-level vulnerability and recipient-level characteristics. Results Among 19 287 kidney transplant recipients, 6080 (32%) received LDKT. A total of 11 582 (60%) were male, and the median (interquartile range) age was 54 (43-63) years. There were 760 Black LDKT recipients (13%), 4865 White LDKT recipients (80%), and 455 LDKT recipients of other races (7%; American Indian, Asian, multiracial, and Pacific Islander). Recipients who lived in communities with higher SVI (ie, more vulnerable) had lower likelihood of LDKT compared with recipients who lived in communities with lower SVI (ie, less vulnerable) (adjusted relative risk [aRR], 0.97; 95% CI, 0.96-0.98; P < .001). Independent of community-level vulnerability, compared with White recipients, Black recipients had 37% lower likelihood (aRR, 0.63; 95% CI, 0.59-0.67; P < .001) and recipients of other races had 24% lower likelihood (aRR, 0.76; 95% CI, 0.70-0.82; P < .001) of LDKT. The interaction between SVI and race was significant among Black recipients, such that the disparity in LDKT between Black and White recipients increased with greater community-level vulnerability (ratio of aRRs, 0.67; 95% CI, 0.51-0.87; P = .003). Conclusions and Relevance Community-level vulnerability is associated with access to LDKT but only partially explains LDKT racial disparities. The adverse effects of living in more vulnerable communities were worse for Black recipients. The interaction of these constructs is worrisome and suggests evaluation of other health system factors that may contribute to LDKT racial disparities is needed.
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Affiliation(s)
| | - Brittany Shelton
- Comprehensive Transplant Institute, University of Alabama at Birmingham
| | - Paul MacLennan
- Comprehensive Transplant Institute, University of Alabama at Birmingham
| | | | - Alexis Carter
- Comprehensive Transplant Institute, University of Alabama at Birmingham
| | - Rhiannon Reed
- Comprehensive Transplant Institute, University of Alabama at Birmingham
| | - Haiyan Qu
- Comprehensive Transplant Institute, University of Alabama at Birmingham
| | - Babak Orandi
- Comprehensive Transplant Institute, University of Alabama at Birmingham
| | - Vineeta Kumar
- Comprehensive Transplant Institute, University of Alabama at Birmingham
| | - Deirdre Sawinski
- Department of Medicine, University of Pennsylvania, Philadelphia
| | - Jayme E. Locke
- Comprehensive Transplant Institute, University of Alabama at Birmingham
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Shao CC, McLeod MC, Gleason L, Marques ICDS, Chu DI, Gunnells D. Effect of COVID-19 Pandemic Restructuring on Surgical Volume and Outcomes of Non-COVID Patients Undergoing Surgery. Am Surg 2021; 88:489-497. [PMID: 34743607 PMCID: PMC8859476 DOI: 10.1177/00031348211054528] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Objectives COVID-19 has caused significant surgical delays as institutions minimize patient exposure to hospital settings and utilization of health care resources. We aimed to assess changes in surgical case mix and outcomes due to restructuring during the pandemic. Methods Patients undergoing surgery at a single tertiary care institution in the Deep South were identified using institutional ACS-NSQIP data. Primary outcome was case mix. Secondary outcomes were post-operative complications. Chi-square, ANOVA, logistic regression, and linear regression were used to compare the control (pre-COVID, Mar 2018-Mar 2020) and case (during COVID, Mar 2020-Mar 2021) groups. Results Overall, there were 6912 patients (control: 4,800 and case: 2112). Patients were 70% white, 29% black, 60% female, and 39% privately insured. Mean BMI was 30.2 (SD = 7.7) with mean age of 58.3 years (SD = 14.8). Most surgeries were with general surgery (48%), inpatient (68%), and elective (83%). On multivariable logistic regression, patients undergoing surgery during the pandemic were more likely to be male (OR: 1.14) and in SIRS (OR: 2.07) or sepsis (OR: 2.28) at the time of surgery. Patients were less likely to have dyspnea with moderate exertion (OR: .75) and were less dependent on others (partially dependent OR: .49 and totally dependent OR: .15). Surgeries were more likely to be outpatient (OR: 1.15) and with neurosurgery (OR: 1.19). On bivariate analysis, there were no differences in post-operative outcomes. Conclusion Surgeries during the COVID-19 pandemic were more often outpatient without differences in post-operative outcomes. Additional analysis is needed to determine the impact of duration of operative delay on surgical outcomes with restructuring focusing more on outpatient surgeries.
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Affiliation(s)
- Connie C Shao
- Department of Surgery, 155569University of Alabama, Birmingham, AL, USA
| | - M Chandler McLeod
- Department of Surgery, 155569University of Alabama, Birmingham, AL, USA
| | - Lauren Gleason
- Department of Surgery, 155569University of Alabama, Birmingham, AL, USA
| | | | - Daniel I Chu
- Department of Surgery, 155569University of Alabama, Birmingham, AL, USA
| | - Drew Gunnells
- Department of Surgery, 155569University of Alabama, Birmingham, AL, USA
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Colston DC, Xie Y, Thrasher JF, Patrick ME, Titus AR, Emery S, McLeod MC, Elliott MR, Fleischer NL. Examining Truth and State-Sponsored Media Campaigns as a Means of Decreasing Youth Smoking and Related Disparities in the U.S. Nicotine Tob Res 2021; 24:469-477. [PMID: 34718762 DOI: 10.1093/ntr/ntab226] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 09/08/2021] [Accepted: 10/26/2021] [Indexed: 11/14/2022]
Abstract
INTRODUCTION To analyze the impact of Truth and state-sponsored anti-tobacco media campaigns on youth smoking in the U.S., and their potential to reduce tobacco-related health disparities. METHODS Our study included data from the 2000-2015 Monitoring the Future study, an annual nationally representative survey of youth in 8 th (n=201,913), 10 th (n=194,468), and 12 th grades (n=178,379). Our primary exposure was Gross Ratings Points (GRPS) of Truth or state-sponsored anti-tobacco advertisements, from Nielsen Media Research. Modified Poisson regression was used to assess the impact of a respondent's GRPs on smoking intentions, past 30-day smoking participation, and first and daily smoking initiation. Additive interactions with sex, parental education, college plans, and race/ethnicity were used to test for differential effects of campaign exposure on each outcome. RESULTS Greater campaign exposure (80 th vs. 20 th GRP percentile) was associated with lower probabilities of smoking intentions among 8 th graders, smoking participation among 8 th and 12 th graders, and initiation among 8 th graders. Greater exposure was associated with a greater reduction in the likelihood of smoking participation among 10 th and 12 th grade males than females; 10 th and 12 th graders with parents of lower education versus those with a college degree; and 12 th graders who did not definitely plan to go to college relative to those who did. CONCLUSIONS Media campaign exposure was associated with a lower likelihood of youth smoking behaviors. Associations were more pronounced for groups disproportionately affected by smoking, including youth of lower socioeconomic status. Media campaigns may be useful in reducing smoking disparities and improving health equity. IMPLICATIONS Few recent studies have investigated the impact of anti-tobacco media campaigns on youth smoking and their potential to reduce tobacco-related health disparities in the U.S. We found media campaigns - specifically state-sponsored media campaigns - reduced the likelihood of several smoking outcomes among youth, with some evidence that they mitigate disparities for disproportionately affected groups.
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Affiliation(s)
- David C Colston
- Department of Epidemiology, Center for Social Epidemiology and Population Health, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Yanmei Xie
- Department of Epidemiology, Center for Social Epidemiology and Population Health, School of Public Health, University of Michigan, Ann Arbor, MI, USA.,Biostatistics Core of the Rogel Cancer Center, University of Michigan, Ann Arbor, MI, USA
| | - James F Thrasher
- Department of Health Promotion, Education, and Behavior, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA.,Department of Tobacco Research, Center for Population Health Research National Institute of Public Health, Cuernavaca, Mexico
| | - Megan E Patrick
- Institute for Social Research, University of Michigan, Ann Arbor, MI, USA
| | - Andrea R Titus
- Department of Population Health, New York University Grossman School of Medicine, New York, NY, USA
| | - Sherry Emery
- Social Data Collaboratory, NORC at the University of Chicago, Chicago, Illinois, USA
| | - M Chandler McLeod
- Biostatistics Core of the Rogel Cancer Center, University of Michigan, Ann Arbor, MI, USA
| | - Michael R Elliott
- Institute for Social Research, University of Michigan, Ann Arbor, MI, USA.,Department of Biostatistics, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Nancy L Fleischer
- Department of Epidemiology, Center for Social Epidemiology and Population Health, School of Public Health, University of Michigan, Ann Arbor, MI, USA
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Killian AC, Reed RD, Carter A, McLeod MC, Shelton BA, Kumar V, Qu H, MacLennan PA, Orandi BJ, Cannon RM, Anderson D, Hanaway MJ, Locke JE. Self-advocacy is associated with lower likelihood of living donor kidney transplantation. Am J Surg 2020; 222:36-41. [PMID: 33413873 DOI: 10.1016/j.amjsurg.2020.12.035] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 12/08/2020] [Accepted: 12/20/2020] [Indexed: 10/22/2022]
Abstract
BACKGROUND The Living Donor Navigator (LDN) Program pairs kidney transplant candidates (TC) with a friend or family member for advocacy training to help identify donors and achieve living donor kidney transplantation (LDKT). However, some TCs participate alone as self-advocates. METHODS In this retrospective cohort study of TCs in the LDN program (04/2017-06/2019), we evaluated the likelihood of LDKT using Cox proportional hazards regression and rate of donor screenings using ordered events conditional models by advocate type. RESULTS Self-advocates (25/127) had lower likelihood of LDKT compared to patients with an advocate (adjusted hazard ratio (aHR): 0.22, 95% confidence interval (CI): 0.03-1.66, p = 0.14). After LDN enrollment, rate of donor screenings increased 2.5-fold for self-advocates (aHR: 2.48, 95%CI: 1.26-4.90, p = 0.009) and 3.4-fold for TCs with an advocate (aHR: 3.39, 95%CI: 2.20-5.24, p < 0.0001). CONCLUSIONS Advocacy training was beneficial for self-advocates, but having an independent advocate may increase the likelihood of LDKT.
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Affiliation(s)
- A Cozette Killian
- University of Alabama at Birmingham Comprehensive Transplant Institute, 701 19th Street South, LHRB 790, Birmingham, AL, 35233, USA.
| | - Rhiannon D Reed
- University of Alabama at Birmingham Comprehensive Transplant Institute, 701 19th Street South, LHRB 790, Birmingham, AL, 35233, USA.
| | - Alexis Carter
- University of Alabama at Birmingham Comprehensive Transplant Institute, 701 19th Street South, LHRB 790, Birmingham, AL, 35233, USA.
| | - M Chandler McLeod
- University of Alabama at Birmingham Comprehensive Transplant Institute, 701 19th Street South, LHRB 790, Birmingham, AL, 35233, USA.
| | - Brittany A Shelton
- University of Alabama at Birmingham Comprehensive Transplant Institute, 701 19th Street South, LHRB 790, Birmingham, AL, 35233, USA.
| | - Vineeta Kumar
- University of Alabama at Birmingham Comprehensive Transplant Institute, 701 19th Street South, LHRB 790, Birmingham, AL, 35233, USA.
| | - Haiyan Qu
- University of Alabama at Birmingham Comprehensive Transplant Institute, 701 19th Street South, LHRB 790, Birmingham, AL, 35233, USA.
| | - Paul A MacLennan
- University of Alabama at Birmingham Comprehensive Transplant Institute, 701 19th Street South, LHRB 790, Birmingham, AL, 35233, USA.
| | - Babak J Orandi
- University of Alabama at Birmingham Comprehensive Transplant Institute, 701 19th Street South, LHRB 790, Birmingham, AL, 35233, USA.
| | - Robert M Cannon
- University of Alabama at Birmingham Comprehensive Transplant Institute, 701 19th Street South, LHRB 790, Birmingham, AL, 35233, USA.
| | - Douglas Anderson
- University of Alabama at Birmingham Comprehensive Transplant Institute, 701 19th Street South, LHRB 790, Birmingham, AL, 35233, USA.
| | - Michael J Hanaway
- University of Alabama at Birmingham Comprehensive Transplant Institute, 701 19th Street South, LHRB 790, Birmingham, AL, 35233, USA.
| | - Jayme E Locke
- University of Alabama at Birmingham Comprehensive Transplant Institute, 701 19th Street South, LHRB 790, Birmingham, AL, 35233, USA.
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Fleischer NL, Donahoe JT, McLeod MC, Thrasher JF, Levy DT, Elliott MR, Meza R, Patrick ME. Taxation reduces smoking but may not reduce smoking disparities in youth. Tob Control 2020; 30:264-272. [PMID: 32269173 DOI: 10.1136/tobaccocontrol-2019-055478] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 02/24/2020] [Accepted: 03/11/2020] [Indexed: 11/03/2022]
Abstract
OBJECTIVE This study examines the extent to which cigarette taxes affect smoking behaviour and disparities in smoking among adolescents by gender, socioeconomic status (SES) and race/ethnicity. METHODS We used US nationally representative, repeated cross-sectional data from the 2005 to 2016 Monitoring the Future study to evaluate the relationship between state cigarette taxes and past 30-day current smoking, smoking intensity, and first cigarette and daily smoking initiation using modified Poisson and linear regression models, stratified by grade. We tested for interactions between tax and gender, SES and race/ethnicity on the additive scale using average marginal effects. RESULTS We found that higher taxes were associated with lower smoking outcomes, with variation by grade. Across nearly all of our specifications, there were no statistically significant interactions between tax and gender, SES or race/ethnicity for any grades/outcomes. One exception is that among 12th graders, there was a statistically significant interaction between tax and college plans, with taxes being associated with a lower probability of 30-day smoking among students who definitely planned to attend college compared with those who did not. CONCLUSION We conclude that higher taxes were associated with reduced smoking among adolescents, with little difference by gender, SES and racial/ethnicity groups. While effective at reducing adolescent smoking, taxes appear unlikely to reduce smoking disparities among youth.
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Affiliation(s)
- Nancy L Fleischer
- Epidemiology, School of Public Health, University of Michigan, Ann Arbor, Michigan, USA
| | - J Travis Donahoe
- Graduate School of Arts & Sciences, Harvard University, Cambridge, Massachusetts, USA
| | - M Chandler McLeod
- Biostatistics Core, Rogel Cancer Center, University of Michigan, Ann Arbor, Michigan, USA
| | - James F Thrasher
- Health Promotion, Education, and Behavior, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina, USA.,Tobacco Research, Center for Population Health Research, National Institute of Public Health, Cuernavaca, Mexico
| | - David T Levy
- Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, Washington, DC, USA
| | - Michael R Elliott
- Biostatistics, School of Public Health, University of Michigan, Ann Arbor, Michigan, USA.,Survey Research Center, Institute for Social Research, University of Michigan, Ann Arbor, Michigan, USA
| | - Rafael Meza
- Epidemiology, School of Public Health, University of Michigan, Ann Arbor, Michigan, USA
| | - Megan E Patrick
- Institute of Child Development and Institute for Translational Research in Children's Mental Health, University of Minnesota Twin Cities, Minneapolis, Minnesota, USA
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29
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Veenstra CM, Hawley ST, McLeod MC, Banerjee M, Griggs JJ. Partnered status and receipt of guideline-concordant adjuvant chemotherapy among patients with colon cancer. Cancer 2019; 125:4232-4240. [PMID: 31433501 DOI: 10.1002/cncr.32459] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 07/18/2019] [Accepted: 07/18/2019] [Indexed: 11/11/2022]
Abstract
BACKGROUND Partnered status is an independent predictor of clinical outcomes, including overall survival, among patients with cancer. However, the mechanisms by which partnered status impacts survival are not fully understood and to the authors' knowledge the associations between partnered status and the specific attributes of chemotherapy have not been studied to date. METHODS The current study was an observational study of patients with resected American Joint Committee on Cancer (AJCC) stage III colon cancer diagnosed from 2008 through 2015 and recruited from an academic cancer center and 2 large community oncology practices. Outcome measures were specific attributes of adjuvant chemotherapy. Partnered status (partnered vs unpartnered) was the primary independent variable. Bivariate comparisons between independent variables and the primary outcomes were performed. Associations between partnered status and the outcomes also were analyzed using multivariable generalized estimating equations using a logit link. RESULTS Data were collected from 436 patients. Of these patients, approximately 65% were from community oncology practices. Approximately 62% were partnered (married or living with a partner), and approximately 86% received adjuvant chemotherapy. Among these individuals, 87% received multiagent chemotherapy and 65% completed 6 months of therapy. Partnered patients were found to have a higher odds of completing chemotherapy (odds ratio, 1.98; 95% CI, 1.04-3.77). CONCLUSIONS In this innovative investigation of the associations between partnered status and specific attributes of curative-intent chemotherapy, approximately 35% of patients terminated chemotherapy early. Having a partner increased the odds of completing therapy, which may be one mechanism through which having a partner improves disease-specific outcomes among patients with colon cancer. Identifying those aspects of partner support that can be reproduced with community or clinical personnel may help unpartnered patients to complete the recommended course of curative-intent chemotherapy.
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Affiliation(s)
- Christine M Veenstra
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan.,Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor, Michigan
| | - Sarah T Hawley
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan.,Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor, Michigan
| | - M Chandler McLeod
- Department of Biostatistics, University of Michigan, Ann Arbor, Michigan
| | - Mousumi Banerjee
- Department of Biostatistics, University of Michigan, Ann Arbor, Michigan
| | - Jennifer J Griggs
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan.,Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor, Michigan
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Abstract
Importance The American College of Surgeons Oncology Group (ACOSOG) Z0011 study demonstrated the safety of sentinel node biopsy alone in clinically node-negative women with metastases in 1 or 2 sentinel nodes treated with breast conservation. Little is known about surgeon perspectives regarding when axillary lymph node dissection (ALND) can be omitted. Objectives To determine surgeon acceptance of ACOSOG Z0011 findings, identify characteristics associated with acceptance of ACOSOG Z0011 results, and examine the association between acceptance of the Society of Surgical Oncology and American Society for Radiation Oncology negative margin of no ink on tumor and surgeon preference for ALND. Design, Setting, and Participants A survey was sent to 488 surgeons treating a population-based sample of women with early-stage breast cancer (N = 5080). The study was conducted from July 1, 2013, to August 31, 2015. Main Outcomes and Measures Surgeons were categorized as having low, intermediate, or high propensity for ALND according to the outer quartiles of ALND scale distribution. A multivariable linear regression model was used to confirm independent associations. Results Of the 488 surgeons invited to participate, 376 (77.0%) responded and 359 provided complete information regarding propensity for ALND derived from 5 clinical scenarios. Mean surgeon age was 53.7 (range, 31-80) years; 277 (73.7%) were male; 142 (37.8%) treated 20 or fewer breast cancers annually and 108 (28.7%) treated more than 50. One hundred seventy-five (49.0%) recommended ALND for 1 macrometastasis. Of low-propensity surgeons who recommended ALND, only 1 (1.1%) approved ALND for any nodal metastases compared with 69 (38.6%) and 85 (95.5%) of selective and high-propensity surgeons (P < .001), respectively. In multivariable analysis, lower ALND propensity was significantly associated with higher breast cancer volume (21-50: -0.19; 95% CI, -0.39 to 0.02; >51: -0.48; 95% CI, -0.71 to -0.24; P < .001), recommendation of a minimal margin width (1-5 mm: -0.10; 95% CI, -0.43 to 0.22; no ink on tumor: -0.53; 95% CI, -0.82 to -0.24; P < .001), participation in a multidisciplinary tumor board (1%-9%: -0.25; 95% CI, -0.55 to 0.05; >9%: -0.37; 95% CI, -0.63 to -0.11; P = .02), and Los Angeles Surveillance, Epidemiology, and End Results site (-0.18; 95% CI, -0.35 to -0.01; P = .04). Conclusions and Relevance This study shows substantial variation in surgeon acceptance of more limited surgery for breast cancer, which is associated with higher breast cancer volume and multidisciplinary interactions, suggesting the potential for overtreatment of many patients and the need for education targeting lower-volume breast surgeons.
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Affiliation(s)
- Monica Morrow
- Breast Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Reshma Jagsi
- Department of Radiation Oncology, University of Michigan, Ann Arbor
| | - M Chandler McLeod
- Department of Biostatistics, School of Public Health, University of Michigan, Ann Arbor
| | - Dean Shumway
- Department of Radiation Oncology, University of Michigan, Ann Arbor
| | - Steven J Katz
- Department of Health Management and Policy, School of Public Health, University of Michigan, Ann Arbor
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Wallner LP, Li Y, McLeod MC, Gargaro J, Kurian AW, Jagsi R, Radhakrishnan A, Hamilton AS, Ward KC, Hawley ST, Katz SJ. Primary care provider-reported involvement in breast cancer treatment decisions. Cancer 2019; 125:1815-1822. [PMID: 30707773 PMCID: PMC6509002 DOI: 10.1002/cncr.31998] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 12/14/2018] [Accepted: 12/24/2018] [Indexed: 01/07/2023]
Abstract
BACKGROUND Treatment decisions for patients with early-stage breast cancer often involve discussions with multiple oncology providers. However, the extent to which primary care providers (PCPs) are involved in initial treatment decisions remains unknown. METHODS A stratified random sample of PCPs identified by newly diagnosed patients with early-stage breast cancer from the Georgia and Los Angeles Surveillance, Epidemiology, and End Results registries were surveyed (n = 517; a 61% response rate). PCPs were asked how frequently they discussed surgery, radiation, and chemotherapy options with patients; how comfortable they were with these discussions; whether they had the necessary knowledge to participate in decision making; and what their confidence was in their ability to help (on 5-item Likert-type scales). Multivariate logistic regression was used to identify PCP-reported attitudes associated with more PCP participation in each treatment decision. RESULTS In this sample, 34% of PCPs reported that they discussed surgery, 23% discussed radiation, and 22% discussed chemotherapy options with their patients. Of those who reported more involvement in surgical decisions, 22% reported that they were not comfortable having a discussion, and 17% did not feel that they had the necessary knowledge to participate in treatment decision making. PCPs who positively appraised their ability to participate were more likely to participate in all 3 decisions (odds ratio [OR] for surgery, 6.01; 95% confidence interval [CI], 4.16-8.68; OR for radiation, 8.37; 95% CI, 5.16-13.58; OR for chemotherapy, 6.56; 95% CI, 4.23-10.17). CONCLUSIONS A third of PCPs reported participating in breast cancer treatment decisions, yet gaps in their knowledge about decision making and in their confidence in their ability to help exist. Efforts to increase PCPs' knowledge about breast cancer treatment options may be warranted.
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Affiliation(s)
- Lauren P. Wallner
- University of Michigan, Department of Internal Medicine, Ann Arbor, MI, United States
- University of Michigan, Department of Epidemiology
| | - Yun Li
- University of Michigan, Department of Biostatistics
| | | | - Joan Gargaro
- University of Michigan, Department of Internal Medicine, Ann Arbor, MI, United States
| | - Allison W. Kurian
- Stanford University, Departments of Medicine and Health Research & Policy
| | - Reshma Jagsi
- University of Michigan, Department of Radiation Oncology and Center for Bioethics and Social Sciences in Medicine
| | - Archana Radhakrishnan
- University of Michigan, Department of Internal Medicine, Ann Arbor, MI, United States
| | - Ann S. Hamilton
- University of Southern California Keck School of Medicine, Department of Preventive Medicine
| | - Kevin C. Ward
- Emory University Rollins School of Public Health, Department of Epidemiology
| | - Sarah T. Hawley
- University of Michigan, Department of Internal Medicine, Ann Arbor, MI, United States
- University of Michigan School of Public Health, Department of Health Management and Policy
- University of Michigan School of Public Health, Department of Health Behavior and Education
| | - Steven J. Katz
- University of Michigan, Department of Internal Medicine, Ann Arbor, MI, United States
- University of Michigan School of Public Health, Department of Health Management and Policy
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Kurian AW, Bondarenko I, Jagsi R, Friese CR, McLeod MC, Hawley ST, Hamilton AS, Ward KC, Hofer TP, Katz SJ. Recent Trends in Chemotherapy Use and Oncologists' Treatment Recommendations for Early-Stage Breast Cancer. J Natl Cancer Inst 2018; 110:493-500. [PMID: 29237009 PMCID: PMC5946952 DOI: 10.1093/jnci/djx239] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 08/10/2017] [Accepted: 10/11/2017] [Indexed: 12/27/2022] Open
Abstract
Background There is growing concern about overtreatment of breast cancer as outcomes have improved over time. However, little is known about how chemotherapy use and oncologists' recommendations have changed in recent years. Methods We surveyed 5080 women (70% response rate) diagnosed with breast cancer between 2013 and 2015 and accrued through two Surveillance, Epidemiology, and End Results registries (Georgia and Los Angeles) about chemotherapy receipt and their oncologists' chemotherapy recommendations. We surveyed 504 attending oncologists (60.3% response rate ) about chemotherapy recommendations in node-negative and node-positive case scenarios. We conducted descriptive statistics of chemotherapy use and patients' report of oncologists' recommendations and used a generalized linear mixed model of chemotherapy use according to time and clinical factors. All statistical tests were two-sided. Results The analytic sample was 2926 patients with stage I-II, estrogen receptor-positive, human epidermal growth factor receptor 2-negative breast cancer. From 2013 to 2015, keeping other factors constant, chemotherapy use was estimated to decline from 34.5% (95% confidence interval [CI] = 30.8% to 38.3%) to 21.3% (95% CI = 19.0% to 23.7%, P < .001). Estimated decline in chemotherapy use was from 26.6% (95% CI = 23.0% to 30.7%) to 14.1% (95% CI = 12.0% to 16.3%) for node-negative/micrometastasis patients and from 81.1% (95% CI = 76.6% to 85.0%) to 64.2% (95% CI = 58.6% to 69.6%) for node-positive patients. Use of the 21-gene recurrence score (RS) did not change among node-negative/micrometastasis patients, and increasing RS use in node-positive patients accounted for one-third of the chemotherapy decline. Patients' report of oncologists' recommendations for chemotherapy declined from 44.9% (95% CI = 40.2% to 49.7%) to 31.6% (95% CI = 25.9% to 37.9%), controlling for other factors. Oncologists were much more likely to order RS if patient preferences were discordant with their recommendations (67.4%, 95% CI = 61.7% to 73.0%, vs 17.5%, 95% CI = 13.1% to 22.0%, concordant), and they adjusted recommendations based on patient preferences and RS results. Conclusions For both node-negative/micrometastasis and node-positive patients, chemotherapy receipt and oncologists' recommendations for chemotherapy declined markedly over time, without substantial change in practice guidelines. Results of ongoing trials will be essential to confirm the quality of this approach to breast cancer care.
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Affiliation(s)
- Allison W Kurian
- Department of Medicine and Health Research and Policy, Stanford University, Stanford, CA
| | | | - Reshma Jagsi
- Department of Radiation Oncology, Center for Bioethics and Social Science in Medicine
| | | | | | - Sarah T Hawley
- Department of Health Management and Policy, School of Public Health
- Division of General Medicine, Department of Internal Medicine
- Veterans Administration Center for Clinical Management Research, Ann Arbor VA Health Care System, Ann Arbor, MI
| | - Ann S Hamilton
- Department of Preventive Medicine in the Keck School of Medicine, University of Southern California, Los Angeles, CA
| | - Kevin C Ward
- Emory University, Rollins School of Public Health, Department of Epidemiology, Atlanta, GA
| | - Timothy P Hofer
- Veterans Administration Center for Clinical Management Research, Health Services Research and Development Service Center of Innovation, and Department of Internal Medicine
| | - Steven J Katz
- Department of Health Management and Policy, School of Public Health
- Division of General Medicine, Department of Internal Medicine
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Wallner LP, Li Y, McLeod MC, Hamilton AS, Ward KC, Veenstra CM, An LC, Janz NK, Katz SJ, Hawley ST. Decision-support networks of women newly diagnosed with breast cancer. Cancer 2017; 123:3895-3903. [PMID: 28640360 PMCID: PMC5626589 DOI: 10.1002/cncr.30848] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 05/19/2017] [Accepted: 05/24/2017] [Indexed: 01/07/2023]
Abstract
BACKGROUND Little is known about the size and characteristics of the decision-support networks of women newly diagnosed with breast cancer and whether their involvement improves breast cancer treatment decisions. METHODS A population-based sample of patients newly diagnosed with breast cancer in 2014 and 2015, as reported to the Georgia and Los Angeles Surveillance, Epidemiology, and End Results registries, were surveyed approximately 7 months after diagnosis (N = 2502; response rate, 68%). Network size was estimated by asking women to list up to 3 of the most important decision-support persons (DSPs) who helped them with locoregional therapy decisions. Decision deliberation was measured using 4 items assessing the degree to which patients thought through the decision, with higher scores reflecting more deliberative breast cancer treatment decisions. The size of the network (range, 0-3 or more) was compared across patient-level characteristics, and adjusted mean deliberation scores were estimated across levels of network size using multivariable linear regression. RESULTS Of the 2502 women included in this analysis, 51% reported having 3 or more DSPs, 20% reported 2, 18% reported 1, and 11% reported not having any DSPs. Married/partnered women, those younger than 45 years, and black women all were more likely to report larger network sizes (all P < .001). Larger support networks were associated with more deliberative surgical treatment decisions (P < .001). CONCLUSIONS Most women engaged multiple DSPs in their treatment decision making, and involving more DSPs was associated with more deliberative treatment decisions. Future initiatives to improve treatment decision making among women with breast cancer should acknowledge and engage informal DSPs. Cancer 2017;123:3895-903. © 2017 American Cancer Society.
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Affiliation(s)
- Lauren P. Wallner
- University of Michigan, Department of Internal Medicine
- University of Michigan, Department of Epidemiology
| | - Yun Li
- University of Michigan, Department of Biostatistics
| | | | - Ann S. Hamilton
- University of Southern California Keck School of Medicine, Department of Preventive Medicine
| | | | - Christine M. Veenstra
- University of Michigan, Department of Internal Medicine, Division of Hematology and Oncology
| | | | - Nancy K. Janz
- University of Michigan, Department of Health Behavior and Health Education
| | - Steven J. Katz
- University of Michigan, Department of Internal Medicine
- University of Michigan, Department of Health Management and Policy
| | - Sarah T. Hawley
- University of Michigan, Department of Internal Medicine
- University of Michigan, Department of Health Behavior and Health Education
- University of Michigan, Department of Health Management and Policy
- Ann Arbor VA Center for Clinical Management Research
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Kurian AW, Li Y, Hamilton AS, Ward KC, Hawley ST, Morrow M, McLeod MC, Jagsi R, Katz SJ. Gaps in Incorporating Germline Genetic Testing Into Treatment Decision-Making for Early-Stage Breast Cancer. J Clin Oncol 2017; 35:2232-2239. [PMID: 28402748 PMCID: PMC5501363 DOI: 10.1200/jco.2016.71.6480] [Citation(s) in RCA: 186] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Purpose Genetic testing for breast cancer risk is evolving rapidly, with growing use of multiple-gene panels that can yield uncertain results. However, little is known about the context of such testing or its impact on treatment. Methods A population-based sample of patients with breast cancer diagnosed in 2014 to 2015 and identified by two SEER registries (Georgia and Los Angeles) were surveyed about genetic testing experiences (N = 3,672; response rate, 68%). Responses were merged with SEER data. A patient subgroup at higher pretest risk of pathogenic mutation carriage was defined according to genetic testing guidelines. Patients' attending surgeons were surveyed about genetic testing and results management. We examined patterns and correlates of genetic counseling and testing and the impact of results on bilateral mastectomy (BLM) use. Results Six hundred sixty-six patients reported genetic testing. Although two thirds of patients were tested before surgical treatment, patients without private insurance more often experienced delays. Approximately half of patients (57% at higher pretest risk, 42% at average risk) discussed results with a genetic counselor. Patients with pathogenic mutations in BRCA1/2 or another gene had the highest rates of BLM (higher risk, 80%; average risk, 85%); however, BLM was also common among patients with genetic variants of uncertain significance (VUS; higher risk, 43%; average risk, 51%). Surgeons' confidence in discussing testing increased with volume of patients with breast cancer, but many surgeons (higher volume, 24%; lower volume, 50%) managed patients with BRCA1/2 VUS the same as patients with BRCA1/2 pathogenic mutations. Conclusion Many patients with breast cancer are tested without ever seeing a genetic counselor. Half of average-risk patients with VUS undergo BLM, suggesting a limited understanding of results that some surgeons share. These findings emphasize the need to address challenges in personalized communication about genetic testing.
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Affiliation(s)
- Allison W. Kurian
- Allison W. Kurian, Stanford University, Stanford; Ann S. Hamilton, Keck School of Medicine, University of Southern California, Los Angeles, CA; Yun Li, M. Chandler McLeod, and Steven J. Katz, University of Michigan, School of Public Health; Sarah T. Hawley, University of Michigan, Veterans Administration Center for Clinical Management Research, Ann Arbor Veterans Affairs Health Care System; Reshma Jagsi, University of Michigan, Center for Bioethics and Social Science in Medicine, Ann Arbor, MI; Kevin C. Ward, Emory University, Rollins School of Public Health, Atlanta, GA; and Monica Morrow, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Yun Li
- Allison W. Kurian, Stanford University, Stanford; Ann S. Hamilton, Keck School of Medicine, University of Southern California, Los Angeles, CA; Yun Li, M. Chandler McLeod, and Steven J. Katz, University of Michigan, School of Public Health; Sarah T. Hawley, University of Michigan, Veterans Administration Center for Clinical Management Research, Ann Arbor Veterans Affairs Health Care System; Reshma Jagsi, University of Michigan, Center for Bioethics and Social Science in Medicine, Ann Arbor, MI; Kevin C. Ward, Emory University, Rollins School of Public Health, Atlanta, GA; and Monica Morrow, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Ann S. Hamilton
- Allison W. Kurian, Stanford University, Stanford; Ann S. Hamilton, Keck School of Medicine, University of Southern California, Los Angeles, CA; Yun Li, M. Chandler McLeod, and Steven J. Katz, University of Michigan, School of Public Health; Sarah T. Hawley, University of Michigan, Veterans Administration Center for Clinical Management Research, Ann Arbor Veterans Affairs Health Care System; Reshma Jagsi, University of Michigan, Center for Bioethics and Social Science in Medicine, Ann Arbor, MI; Kevin C. Ward, Emory University, Rollins School of Public Health, Atlanta, GA; and Monica Morrow, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Kevin C. Ward
- Allison W. Kurian, Stanford University, Stanford; Ann S. Hamilton, Keck School of Medicine, University of Southern California, Los Angeles, CA; Yun Li, M. Chandler McLeod, and Steven J. Katz, University of Michigan, School of Public Health; Sarah T. Hawley, University of Michigan, Veterans Administration Center for Clinical Management Research, Ann Arbor Veterans Affairs Health Care System; Reshma Jagsi, University of Michigan, Center for Bioethics and Social Science in Medicine, Ann Arbor, MI; Kevin C. Ward, Emory University, Rollins School of Public Health, Atlanta, GA; and Monica Morrow, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Sarah T. Hawley
- Allison W. Kurian, Stanford University, Stanford; Ann S. Hamilton, Keck School of Medicine, University of Southern California, Los Angeles, CA; Yun Li, M. Chandler McLeod, and Steven J. Katz, University of Michigan, School of Public Health; Sarah T. Hawley, University of Michigan, Veterans Administration Center for Clinical Management Research, Ann Arbor Veterans Affairs Health Care System; Reshma Jagsi, University of Michigan, Center for Bioethics and Social Science in Medicine, Ann Arbor, MI; Kevin C. Ward, Emory University, Rollins School of Public Health, Atlanta, GA; and Monica Morrow, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Monica Morrow
- Allison W. Kurian, Stanford University, Stanford; Ann S. Hamilton, Keck School of Medicine, University of Southern California, Los Angeles, CA; Yun Li, M. Chandler McLeod, and Steven J. Katz, University of Michigan, School of Public Health; Sarah T. Hawley, University of Michigan, Veterans Administration Center for Clinical Management Research, Ann Arbor Veterans Affairs Health Care System; Reshma Jagsi, University of Michigan, Center for Bioethics and Social Science in Medicine, Ann Arbor, MI; Kevin C. Ward, Emory University, Rollins School of Public Health, Atlanta, GA; and Monica Morrow, Memorial Sloan Kettering Cancer Center, New York, NY
| | - M. Chandler McLeod
- Allison W. Kurian, Stanford University, Stanford; Ann S. Hamilton, Keck School of Medicine, University of Southern California, Los Angeles, CA; Yun Li, M. Chandler McLeod, and Steven J. Katz, University of Michigan, School of Public Health; Sarah T. Hawley, University of Michigan, Veterans Administration Center for Clinical Management Research, Ann Arbor Veterans Affairs Health Care System; Reshma Jagsi, University of Michigan, Center for Bioethics and Social Science in Medicine, Ann Arbor, MI; Kevin C. Ward, Emory University, Rollins School of Public Health, Atlanta, GA; and Monica Morrow, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Reshma Jagsi
- Allison W. Kurian, Stanford University, Stanford; Ann S. Hamilton, Keck School of Medicine, University of Southern California, Los Angeles, CA; Yun Li, M. Chandler McLeod, and Steven J. Katz, University of Michigan, School of Public Health; Sarah T. Hawley, University of Michigan, Veterans Administration Center for Clinical Management Research, Ann Arbor Veterans Affairs Health Care System; Reshma Jagsi, University of Michigan, Center for Bioethics and Social Science in Medicine, Ann Arbor, MI; Kevin C. Ward, Emory University, Rollins School of Public Health, Atlanta, GA; and Monica Morrow, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Steven J. Katz
- Allison W. Kurian, Stanford University, Stanford; Ann S. Hamilton, Keck School of Medicine, University of Southern California, Los Angeles, CA; Yun Li, M. Chandler McLeod, and Steven J. Katz, University of Michigan, School of Public Health; Sarah T. Hawley, University of Michigan, Veterans Administration Center for Clinical Management Research, Ann Arbor Veterans Affairs Health Care System; Reshma Jagsi, University of Michigan, Center for Bioethics and Social Science in Medicine, Ann Arbor, MI; Kevin C. Ward, Emory University, Rollins School of Public Health, Atlanta, GA; and Monica Morrow, Memorial Sloan Kettering Cancer Center, New York, NY
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Morrow M, Hawley ST, McLeod MC, Hamilton AS, Ward KC, Katz SJ, Jagsi R. Surgeon Attitudes and Use of MRI in Patients Newly Diagnosed with Breast Cancer. Ann Surg Oncol 2017; 24:1889-1896. [PMID: 28332033 PMCID: PMC5784437 DOI: 10.1245/s10434-017-5840-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Indexed: 01/07/2023]
Abstract
BACKGROUND Usage of magnetic resonance imaging (MRI) in newly diagnosed breast cancer patients is increasing, despite scant evidence that it improves outcomes. Little is known about the knowledge, perspectives, and clinical characteristics of surgeons associated with MRI use. METHODS Women with early-stage breast cancer undergoing definitive surgery between July 2013 and August 2015 were identified from the Los Angeles and Georgia Surveillance, Epidemiology and End Results (SEER) registries and were asked to name their attending surgeons. The 489 surgeons were sent a questionnaire; 77% (n = 377) responded. Questions that addressed the likelihood of ordering an MRI in different scenarios were used to create a scale to measure surgeon propensity for MRI use. Knowledge and practice characteristics also were assessed. RESULTS Mean surgeon age was 54 years, 25% were female, and median number of years in practice was 21. Wide MRI use variation was observed, with 26% obtaining MRI for a clinical stage I screen-detected breast cancer and 72% for infiltrating lobular cancer. High users of MRI were significantly more likely to be higher-volume surgeons (p < 0.001) and to have misconceptions about MRI benefits (p < 0.001). Of surgeons who felt they used MRI more often, 60% were high MRI users; only 6% were low MRI users. CONCLUSIONS Our findings suggest relatively frequent use of MRI, even in uncomplicated clinical scenarios, in the absence of evidence of benefit, and use was more common among high-volume surgeons. A substantial number of surgeons who are high MRI users harbor misconceptions about MRI benefit, suggesting an opportunity for education and consensus building regarding appropriate use.
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Affiliation(s)
- Monica Morrow
- Breast Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
| | - Sarah T Hawley
- Department of Internal Medicine, School of Medicine, University of Michigan, Ann Arbor, MI, USA
- Department of Health Management and Policy, School of Public Health, University of Michigan, Ann Arbor, MI, USA
- Veterans Administration Center for Clinical Management Research, Ann Arbor VA Health Care System, Ann Arbor, MI, USA
| | - M Chandler McLeod
- Department of Biostatistics, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Ann S Hamilton
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Kevin C Ward
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA, USA
| | - Steven J Katz
- Department of Internal Medicine, School of Medicine, University of Michigan, Ann Arbor, MI, USA
- Department of Health Management and Policy, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Reshma Jagsi
- Department of Radiation Oncology, School of Medicine, University of Michigan, Ann Arbor, MI, USA
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Janz NK, Li Y, Zikmund-Fisher BJ, Jagsi R, Kurian AW, An LC, McLeod MC, Lee KL, Katz SJ, Hawley ST. The impact of doctor-patient communication on patients' perceptions of their risk of breast cancer recurrence. Breast Cancer Res Treat 2017; 161:525-535. [PMID: 27943007 PMCID: PMC5513530 DOI: 10.1007/s10549-016-4076-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 12/02/2016] [Indexed: 01/07/2023]
Abstract
PURPOSE Doctor-patient communication is the primary way for women diagnosed with breast cancer to learn about their risk of distant recurrence. Yet little is known about how doctors approach these discussions. METHODS A weighted random sample of newly diagnosed early-stage breast cancer patients identified through SEER registries of Los Angeles and Georgia (2013-2015) was sent surveys about ~2 months after surgery (Phase 2, N = 3930, RR 68%). We assessed patient perceptions of doctor communication of risk of recurrence (i.e., amount, approach, inquiry about worry). Clinically determined 10-year risk of distant recurrence was established for low and intermediate invasive cancer patients. Women's perceived risk of distant recurrence (0-100%) was categorized into subgroups: overestimation, reasonably accurate, and zero risk. Understanding of risk and patient factors (e.g. health literacy, numeracy, and anxiety/worry) on physician communication outcomes was evaluated in multivariable regression models (analytic sample for substudy = 1295). RESULTS About 33% of women reported that doctors discussed risk of recurrence as "quite a bit" or "a lot," while 14% said "not at all." Over half of women reported that doctors used words and numbers to describe risk, while 24% used only words. Overestimators (OR .50, CI 0.31-0.81) or those who perceived zero risk (OR .46, CI 0.29-0.72) more often said that their doctor did not discuss risk. Patients with low numeracy reported less discussion. Over 60% reported that their doctor almost never inquired about worry. CONCLUSIONS Effective doctor-patient communication is critical to patient understanding of risk of recurrence. Efforts to enhance physicians' ability to engage in individualized communication around risk are needed.
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Affiliation(s)
- Nancy K Janz
- Department of Health Behavior and Health Education, School of Public Health, University of Michigan, 2830 SPH1, 1415 Washington Heights, Ann Arbor, MI, 48109-2029, USA.
| | - Yun Li
- Department of Biostatistics, University of Michigan, 1415 Washington Heights, Ann Arbor, MI, 48109-2029, USA
| | - Brian J Zikmund-Fisher
- Department of Health Behavior and Health Education, School of Public Health, University of Michigan, 2830 SPH1, 1415 Washington Heights, Ann Arbor, MI, 48109-2029, USA
- Division of General Medicine, Department of Internal Medicine, University of Michigan, 2800 Plymouth Rd, Building 16, Ann Arbor, MI, 48109, USA
- Center for Bioethics and Social Sciences in Medicine, University of Michigan, 1415 Washington Heights, Ann Arbor, MI, 48109-2029, USA
| | - Reshma Jagsi
- Department of Radiation Oncology, University of Michigan, 1500 E Medical Center Dr., Ann Arbor, MI, 48109, USA
| | - Allison W Kurian
- Departments of Medicine and Health Research and Policy, Stanford University, 900 Blake Wilbur, Stanford, CA, 94305, USA
| | - Lawrence C An
- Center for Health Communications Research, Department of Internal Medicine, University of Michigan, 2800 Plymouth Rd, Building 16, Ann Arbor, MI, 48109, USA
| | - M Chandler McLeod
- Department of Biostatistics, University of Michigan, 1415 Washington Heights, Ann Arbor, MI, 48109-2029, USA
| | - Kamaria L Lee
- Division of General Medicine, Department of Internal Medicine, University of Michigan, 2800 Plymouth Rd, Building 16, Ann Arbor, MI, 48109, USA
| | - Steven J Katz
- Division of General Medicine, Department of Internal Medicine, University of Michigan, 2800 Plymouth Rd, Building 16, Ann Arbor, MI, 48109, USA
- Department of Health Management and Policy, University of Michigan, 2800 Plymouth Rd, Building 16, Ann Arbor, MI, 48109, USA
| | - Sarah T Hawley
- Division of General Medicine, Department of Internal Medicine, University of Michigan, 2800 Plymouth Rd, Building 16, Ann Arbor, MI, 48109, USA
- Department of Health Management and Policy, University of Michigan, 2800 Plymouth Rd, Building 16, Ann Arbor, MI, 48109, USA
- Veterans Administration Center for Clinical Management Research, Ann Arbor VA Health Care System, 2215 Fuller Road, Ann Arbor, MI, 48105, USA
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Nickerson PEB, McLeod MC, Myers T, Clarke DB. Effects of epidermal growth factor and erythropoietin on Müller glial activation and phenotypic plasticity in the adult mammalian retina. J Neurosci Res 2011; 89:1018-30. [PMID: 21484851 DOI: 10.1002/jnr.22629] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2010] [Revised: 01/20/2011] [Accepted: 01/20/2011] [Indexed: 11/07/2022]
Abstract
Retinal Müller glia have received considerable attention with regard to their potential to function as quiescent retinal precursors. Various activation strategies induce characteristic features of retinal progenitor cells in Müller glia; however, these are often accompanied by hallmark features of reactive gliosis. We investigated the effects of an intravitreal injection of epidermal growth factor (EGF), a known mitogen, and erythropoietin (EPO) on activation and expression of developmental phenotypes within the adult retina. Using thymidine-analogue labeling as well as immunocytochemical and confocal analyses, we assayed the responses of retinal cells exposed to intravitreal administration of either EGF or EPO. We report that adult Müller glia incorporate bromodeoxyuridine (BrdU) and undergo a process of nuclear translocation to ectopic retinal layers following exposure to EGF. These cells survive within the retina for at least 23 days and express the developmental markers Pax6 and Chx10 as well as nestin and glial fibrillary acidic protein. Furthermore, we demonstrate that cotreatment with EGF and EPO suppresses aspects of EGF-induced glial reactivity, alters the retinal distribution of BrdU-positive nuclei, and serves to regulate the expression of developmental phenotypes seen in these cells. These data further our understanding of Müller cell responsiveness to intravitral, combinatorial growth factor treatments.
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Affiliation(s)
- P E B Nickerson
- Department of Biology, University of Victoria, Victoria, British Columbia, Canada
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Fan X, McLeod MC, Enick RM, Roberts CB. Preparation of Silver Nanoparticles via Reduction of a Highly CO2-Soluble Hydrocarbon-Based Metal Precursor. Ind Eng Chem Res 2006. [DOI: 10.1021/ie050684p] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xin Fan
- Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, and Department of Chemical Engineering, Auburn University, Auburn, Alabama 36830
| | - M. Chandler McLeod
- Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, and Department of Chemical Engineering, Auburn University, Auburn, Alabama 36830
| | - Robert M. Enick
- Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, and Department of Chemical Engineering, Auburn University, Auburn, Alabama 36830
| | - Christopher B. Roberts
- Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, and Department of Chemical Engineering, Auburn University, Auburn, Alabama 36830
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Anand M, McLeod MC, Bell PW, Roberts CB. Tunable Solvation Effects on the Size-Selective Fractionation of Metal Nanoparticles in CO2 Gas-Expanded Solvents. J Phys Chem B 2005; 109:22852-9. [PMID: 16853977 DOI: 10.1021/jp0547008] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This paper presents an environmentally friendly, inexpensive, rapid, and efficient process for size-selective fractionation of polydisperse metal nanoparticle dispersions into multiple narrow size populations. The dispersibility of ligand-stabilized silver and gold nanoparticles is controlled by altering the ligand tails-solvent interaction (solvation) by the addition of carbon dioxide (CO2) gas as an antisolvent, thereby tailoring the bulk solvent strength. This is accomplished by adjusting the CO2 pressure over the liquid, resulting in a simple means to tune the nanoparticle precipitation by size. This study also details the influence of various factors on the size-separation process, such as the types of metal, ligand, and solvent, as well as the use of recursive fractionation and the time allowed for settling during each fractionation step. The pressure range required for the precipitation process is the same for both the silver and gold particles capped with dodecanethiol ligands. A change in ligand or solvent length has an effect on the interaction between the solvent and the ligand tails and therefore the pressure range required for precipitation. Stronger interactions between solvent and ligand tails require greater CO2 pressure to precipitate the particles. Temperature is another variable that impacts the dispersibility of the nanoparticles through changes in the density and the mole fraction of CO2 in the gas-expanded liquids. Recursive fractionation for a given system within a particular pressure range (solvent strength) further reduces the polydispersity of the fraction obtained within that pressure range. Specifically, this work utilizes the highly tunable solvent properties of organic/CO2 solvent mixtures to selectively size-separate dispersions of polydisperse nanoparticles (2 to 12 nm) into more monodisperse fractions (+/-2 nm). In addition to providing efficient separation of the particles, this process also allows all of the solvent and antisolvent to be recovered, thereby rendering it a green solvent process.
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Affiliation(s)
- Madhu Anand
- Department of Chemical Engineering, Auburn University, Auburn, Alabama 36849, USA
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Fan X, Potluri VK, McLeod MC, Wang Y, Liu J, Enick RM, Hamilton AD, Roberts CB, Johnson JK, Beckman EJ. Oxygenated Hydrocarbon Ionic Surfactants Exhibit CO2 Solubility. J Am Chem Soc 2005; 127:11754-62. [PMID: 16104753 DOI: 10.1021/ja052037v] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Several oxygenated hydrocarbons, including acetylated sugars, poly(propylene glycol), and oligo(vinyl acetate), have been used to generate CO2-soluble ionic surfactants. Surfactants with vinyl acetate tails yielded the most promising results, exhibiting levels of CO2 solubility comparable to those associated with fluorinated ionic surfactants. For example, a sodium sulfate with single, oligomeric vinyl acetate (VAc) tails consisting of 10 VAc repeat units was 7 wt % soluble in CO2 at 25 degrees C and 48 MPa. Upon introduction of water to these systems, only surfactants with the oligomeric vinyl acetate tails exhibited spectroscopic evidence of a polar environment that was capable of solubilizing the methyl orange into the CO2-rich phase. For example, a single-phase solution of CO2, 0.15 wt % sodium bis(vinyl acetate)8 sulfosuccinate, and water, at water loading (W) values ranging from 10 to 40 at 25 degrees C and 34.5 MPa, exhibited a methyl orange peak at 423 nm. This result indicated that the core of a reverse micelle provided a microenvironment with a polarity similar to that of methanol. Quantum chemical calculations indicate that the acetylated sugars may be too hydrophilic to readily form reverse micelles, whereas the VAc-based surfactants appear to have the correct balance of hydrophilic and hydrophobic forces necessary to form reverse micelles.
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Affiliation(s)
- Xin Fan
- Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA
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Kitchens CL, McLeod MC, Roberts CB. Chloride ion effects on synthesis and directed assembly of copper nanoparticles in liquid and compressed alkane microemulsions. Langmuir 2005; 21:5166-73. [PMID: 15896066 DOI: 10.1021/la047785x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Microemulsions are effective media for solution-based synthesis of metallic nanoparticles where surfactants and other ionic species influence the directed assembly of the nanomaterials with specific sizes, geometries, and compositions. This study demonstrates the effects of chloride ion on the synthesis of copper nanoparticles within the sodium bis(2-ethylhexyl)sulfosuccinate (AOT) reverse micelle system utilizing both liquid isooctane and compressed propane as the bulk solvent. Copper nanoparticle synthesis can be achieved in the presence of HCl in the micelle core, taking advantage of the buffering action of the AOT surfactant. The concentration of chloride ions influence the particle growth rate and dispersion in liquid isooctane. The presence of chloride ions during particle synthesis in compressed propane has a significant effect on the geometry and structure of the copper nanomaterials produced. Chloride ion addition to the compressed propane/Cu(AOT)(2)-AOT/water reverse micelle system at 20 degrees C and 310 bar results in the formation of diamond-shaped copper nanoparticle assemblies. The copper nanoparticle assemblies exhibit unique structure and retain this structure through repeated solvent processing steps, allowing separation and recovery of the assembled diamond-shaped copper nanoparticle structures.
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McLeod MC, Kitchens CL, Roberts CB. CO2-expanded liquid deposition of ligand-stabilized nanoparticles as uniform, wide-area nanoparticle films. Langmuir 2005; 21:2414-2418. [PMID: 15752033 DOI: 10.1021/la047576c] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Deposition of nanoparticles into uniform, wide-area thin films using CO(2) as an antisolvent is presented. Ligand-stabilized silver particles are controllably precipitated from organic solvents by pressurizing and expanding the solution with carbon dioxide. Subsequent addition of carbon dioxide as a dense supercritical fluid provides for removal of the organic solvent while avoiding the surface tensions common to evaporating solvents that are detrimental to nanoscale assemblies and structures. This brand new CO(2)-expanded liquid particle deposition technique allows for the targeted deposition of particles and results in more uniform and lower defect metal nanoparticle thin films than are provided by conventional solvent evaporation techniques.
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Affiliation(s)
- M Chandler McLeod
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA
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McLeod MC, Anand M, Kitchens CL, Roberts CB. Precise and rapid size selection and targeted deposition of nanoparticle populations using CO2 gas expanded liquids. Nano Lett 2005; 5:461-5. [PMID: 15755095 DOI: 10.1021/nl047966j] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
This paper demonstrates the rapid and precise size selection of nanoparticle populations using the pressure tunable solvent properties of CO2-expanded liquids. Specifically, by pressurizing and expanding a single organic solution with carbon dioxide gas, ligand-stabilized silver particles of desired mean size were size selectively precipitated at desired locations. Compared to current techniques, this CO2-expanded liquid approach provides for faster and more efficient particle size separation, reduction in organic solvent usage, and pressure tunable size selection.
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Affiliation(s)
- M Chandler McLeod
- Department of Chemical Engineering, Auburn University, Auburn, Alabama 36849, USA
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McLeod MC, Gale WF, Roberts CB. Metallic nanoparticle production utilizing a supercritical carbon dioxide flow process. Langmuir 2004; 20:7078-7082. [PMID: 15301490 DOI: 10.1021/la0493262] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Metallic nanoparticles of palladium and silver ranging in size from 1 to 15 nm were produced entirely within carbon dioxide by spraying a carbon dioxide carrier solution containing CO2-soluble metal precursors into a CO2 receiving solution containing a reducing agent (NaBH(OAc)3 or H2) and fluorocarbon thiol stabilizing ligands. The process uses the benign solvent CO2 while also allowing for the production of nanoparticles with a limited number of chemical components. Particles were characterized by transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS).
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Affiliation(s)
- M Chandler McLeod
- Department of Chemical Engineering, Auburn University, Auburn, Alabama 36849, USA
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Kitchens CL, McLeod MC, Roberts CB. Solvent Effects on the Growth and Steric Stabilization of Copper Metallic Nanoparticles in AOT Reverse Micelle Systems. J Phys Chem B 2003. [DOI: 10.1021/jp0354090] [Citation(s) in RCA: 108] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - M. Chandler McLeod
- Department of Chemical Engineering, Auburn University, Auburn, Alabama 36849
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McLeod MC, McHenry RS, Beckman EJ, Roberts CB. Synthesis and Stabilization of Silver Metallic Nanoparticles and Premetallic Intermediates in Perfluoropolyether/CO2 Reverse Micelle Systems. J Phys Chem B 2003. [DOI: 10.1021/jp0218645] [Citation(s) in RCA: 108] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. Chandler McLeod
- Department of Chemical Engineering, Auburn University, Auburn, Alabama 36849, and Chemical Engineering Department, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
| | - R. S. McHenry
- Department of Chemical Engineering, Auburn University, Auburn, Alabama 36849, and Chemical Engineering Department, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
| | - Eric J. Beckman
- Department of Chemical Engineering, Auburn University, Auburn, Alabama 36849, and Chemical Engineering Department, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
| | - Christopher B. Roberts
- Department of Chemical Engineering, Auburn University, Auburn, Alabama 36849, and Chemical Engineering Department, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
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