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Kumar RP, Adida S, Lavadi RS, Mitha R, Legarreta AD, Hudson JS, Shah M, Diebo B, Fields DP, Buell TJ, Hamilton DK, Daniels AH, Agarwal N. A guide to selecting upper thoracic versus lower thoracic uppermost instrumented vertebra in adult spinal deformity correction. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2024:10.1007/s00586-024-08206-9. [PMID: 38522054 DOI: 10.1007/s00586-024-08206-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 01/26/2024] [Accepted: 02/24/2024] [Indexed: 03/25/2024]
Abstract
PURPOSE Operative treatment of adult spinal deformity (ASD) has been shown to improve patient health-related quality of life (HRQOL). Selection of the uppermost instrumented vertebra (UIV) in either the upper thoracic (UT) or lower thoracic (LT) spine is a pivotal decision with effects on operative and postoperative outcomes. This review overviews the multifaceted decision-making process for UIV selection in ASD correction. METHODS PubMed was queried for articles using the keywords "uppermost instrumented vertebra", "upper thoracic", "lower thoracic", and "adult spinal deformity". RESULTS Optimization of UIV selection may lead to superior deformity correction, better patient-reported outcomes, and lower risk of proximal junctional kyphosis (PJK) and failure (PJF). Patient alignment characteristics, including preoperative thoracic kyphosis, coronal deformity, and the magnitude of sagittal correction influence surgical decision-making when selecting a UIV, while comorbidities such as poor body mass index, osteoporosis, and neuromuscular pathology should also be taken in to account. Additionally, surgeon experience and resources available to the hospital may also play a role in this decision. Currently, it is incompletely understood whether postoperative HRQOLs, functional and radiographic outcomes, and complications after surgery differ between selection of the UIV in either the UT or LT spine. CONCLUSION The correct selection of the UIV in surgical planning is a challenging task, which requires attention to preoperative alignment, patient comorbidities, clinical characteristics, available resources, and surgeon-specific factors such as experience.
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Affiliation(s)
- Rohit Prem Kumar
- Department of Neurological Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Samuel Adida
- Department of Neurological Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Raj Swaroop Lavadi
- Department of Neurological Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Rida Mitha
- Department of Neurological Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Andrew D Legarreta
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Joseph S Hudson
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Manan Shah
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Bassel Diebo
- Department of Orthopaedic Surgery, Warren Alpert School of Medicine, Brown University, Providence, RI, USA
| | - Daryl P Fields
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Thomas J Buell
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - D Kojo Hamilton
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Alan H Daniels
- Department of Orthopaedic Surgery, Warren Alpert School of Medicine, Brown University, Providence, RI, USA
| | - Nitin Agarwal
- Department of Neurological Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
- Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
- Neurological Surgery, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, PA, USA.
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Chen M, Ton A, Shahrestani S, Chen X, Ballatori A, Wang JC, Buser Z. The Influence of Hospital Type, Insurance Type, and Patient Income on 30-Day Complication and Readmission Rates Following Lumbar Spine Fusion. Global Spine J 2023:21925682231222903. [PMID: 38103012 DOI: 10.1177/21925682231222903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2023] Open
Abstract
BACKGROUND CONTEXT Several studies have shown that factors such as insurance type and patient income are associated with different readmission rates following certain orthopaedic procedures. The literature, however, remains sparse with regard to these demographic characteristics and their associations to perioperative lumbar spine fusion outcomes. PURPOSE The purpose of this study was to assess the associations between hospital type, insurance type, and patient median income to both 30-day complication and readmission rates following lumbar spine fusion. PATIENT SAMPLE Patients who underwent primary lumbar spine fusion (n = 596,568) from 2010-2016 were queried from the National Readmissions Database (NRD). OUTCOME MEASURES Incidence of 30-day complication and readmission rates. METHODS All relevant diagnoses and procedures were identified using International Classification of Disease, 9th and 10th Edition (ICD-9, 10) codes. Hospital types were categorized as metropolitan non-teaching (n = 212,131), metropolitan teaching (n = 364,752), and rural (n = 19,685). Insurance types included: Medicare (n = 213,534), Medicaid (n = 78,520), private insurance (n = 196,648), and out-of-pocket (n = 45,025). Patient income was divided into the following quartiles: Q1 (n = 112,083), Q2 (n = 145,755), Q3 (n = 156,276), and Q4 (n = 147,289), wherein quartile 1 corresponded to lower income ranges and quartile 4 to higher ranges. Statistical analysis was conducted in R. Kruskal-Wallis tests with Dunn's pairwise comparisons were performed to analyze differences in 30-day readmission and complication rates in patients who underwent lumbar spine fusion. Complications analyzed included infection, wound injury, hematoma, neurological injury, thromboembolic event, and hardware failure. RESULTS 30-day readmission was significantly higher in metropolitan teaching hospitals compared to metropolitan non-teaching hospitals and rural hospitals (P < .05). Patients from metropolitan teaching hospitals had significantly higher rates of infection (P < .001), wound injury (P < .001), hematoma (P = .018), and hardware failure (P < .002) compared to those treated at metropolitan non-teaching hospitals. Privately insured patients were significantly less likely to be readmitted at 30 days than those paying with Medicare or Medicaid (P < .01). Patients with private insurance also experienced significantly lower rates of hematoma formation than Medicare beneficiaries and out-of-pocket payers (P < .01), postoperative wound injury compared to Medicaid patients and out-of-pocket payers (P < .005), and infection compared to all other groups (P < .001). Patients in Quartile 4 experienced significantly greater rates of hematoma formation compared to those in Quartiles 1 and 2 and were more likely to experience a thromboembolic event compared to all other groups. CONCLUSION Patients undergoing lumbar spine fusion at metropolitan non-teaching hospitals and paying with private insurance had significantly lower 30-day readmission rates than their counterparts. Complications within 30 days following lumbar spine fusion were significantly higher in patients treated at metropolitan teaching hospitals and in Medicare and Medicaid beneficiaries. Aside from a few exceptions, however, patient income was generally not associated with differential complication rates.
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Affiliation(s)
- Matthew Chen
- Keck School of Medicine, Department of Orthopaedic Surgery, University of Southern California, Los Angeles, USA
| | - Andy Ton
- Keck School of Medicine, Department of Orthopaedic Surgery, University of Southern California, Los Angeles, USA
| | - Shane Shahrestani
- Keck School of Medicine, Department of Orthopaedic Surgery, University of Southern California, Los Angeles, USA
- Department of Medical Engineering, California Institute of Technology, Pasadena, CA, USA
| | - Xiao Chen
- Keck School of Medicine, Department of Orthopaedic Surgery, University of Southern California, Los Angeles, USA
- Department of Orthopaedic Surgery, Mayo Clinic, Rochester, MN, USA
| | - Alexander Ballatori
- Keck School of Medicine, Department of Orthopaedic Surgery, University of Southern California, Los Angeles, USA
| | - Jeffrey C Wang
- Keck School of Medicine, Department of Orthopaedic Surgery, University of Southern California, Los Angeles, USA
| | - Zorica Buser
- Keck School of Medicine, Department of Orthopaedic Surgery, University of Southern California, Los Angeles, USA
- Gerling Institute, Brooklyn, New York, USA
- Department of Orthopedic Surgery, NYU Grossman School of Medicine, New York, USA
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Achonu JU, Oh K, Shaw J, Rashidian S, Wang F, Komatsu DE, Barsi J. Epidemiologic patterns of adolescent idiopathic scoliosis detection and treatment in new york state. J Pediatr Orthop B 2023; 32:507-516. [PMID: 36847202 DOI: 10.1097/bpb.0000000000001066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
The purpose of this study is to examine the epidemiologic trends of adolescent idiopathic scoliosis (AIS) detection and treatment in New York State (NYS), including disparities in access. The New York Statewide Planning and Research Cooperative System database was reviewed to identify patients who underwent treatment for, or were diagnosed with, AIS from 2008 to 2016. Age determined adolescence; and the surgery date, 3-digit zip code, sex, race, insurance status, institution and surgeon license number were recorded to identify such trends. The geographical distribution was assembled from an NYS shapefile, obtained from the Topologically Integrated Geographic Encoding and Referencing database with analysis performed using tigris R. In total 54 002 patients with AIS, 3967 of whom were surgically treated, were identified for analysis. Diagnoses spiked in 2010. Females were diagnosed and underwent surgical treatment more frequently than males. AIS was diagnosed and treated in white patients more frequently than in black and Asian patients combined. From 2010 to 2013, the patients self-paying for surgical treatment decreased more than other payment modalities. Medium-volume surgeons continually increased the number of cases performed, whereas low-volume surgeons exhibited the opposite pattern. High-volume hospitals had a decrease in the number of cases from 2012 and were overtaken by medium-volume hospitals in 2015. Most procedures are performed within the New York City (NYC) area, though AIS was common in all NYS counties. AIS diagnoses increased after 2010, with fewer patients self-paying for surgery. White patients underwent more procedures than minority patients. Surgical cases were disproportionally performed in the NYC area compared to statewide.
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Affiliation(s)
| | - Ki Oh
- Department of Statisticsf, Renaissance School of Medicine at Stony Brook University, New York, USA
| | - Joshua Shaw
- Department of Statisticsf, Renaissance School of Medicine at Stony Brook University, New York, USA
| | - Sina Rashidian
- Department of Statisticsf, Renaissance School of Medicine at Stony Brook University, New York, USA
| | - Fusheng Wang
- Department of Statisticsf, Renaissance School of Medicine at Stony Brook University, New York, USA
| | | | - James Barsi
- Department of Orthopaedics, Stony Brook University Hospital
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Testa EJ, Brodeur PG, Lama CJ, Hartnett DA, Painter D, Gil JA, Cruz AI. The Effect of Surgeon and Hospital Volume on Morbidity and Mortality After Femoral Shaft Fractures. J Am Acad Orthop Surg Glob Res Rev 2023; 7:01979360-202305000-00009. [PMID: 37141166 PMCID: PMC10162792 DOI: 10.5435/jaaosglobal-d-22-00242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 02/19/2023] [Indexed: 05/05/2023]
Abstract
OBJECTIVES The aim of this study was to characterize the case volume dependence of both facilities and surgeons on morbidity and mortality after femoral shaft fracture (FSF) fixation. METHODS Adults who had an open or closed FSF between 2011 and 2015 were identified in the New York Statewide Planning and Research Cooperative System database. Claims were identified by International Classification of Disease-9, Clinical Modification diagnostic codes for a closed or open FSF and International Classification of Disease-9, Clinical Modification procedure codes for FSF fixation. Readmission, in-hospital mortality, and other adverse events were compared across surgeon and facility volumes using multivariable Cox proportional hazards regression, controlling for patient demographic and clinical factors. Surgeon and facility volumes were compared between the lowest and highest 20% to represent low-volume and high-volume surgeons/facilities. RESULTS Of 4,613 FSF patients identified, 2,824 patients were treated at a high or low-volume facility or by a high or low-volume surgeon. Most of the examined complications including readmission and in-hospital mortality showed no statistically significant differences. Low-volume facilities had a higher 1-month rate of pneumonia. Low-volume surgeons had a lower 3-month rate of pulmonary embolism. CONCLUSION There is minimal difference in outcomes in relation to facility or surgeon case volume for FSF fixation. As a staple of orthopaedic trauma care, FSF fixation is a procedure that may not require specialized orthopaedic traumatologists at high-volume facilities.
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Affiliation(s)
- Edward J Testa
- From the Department of Orthopaedic Surgery, Brown University, Warren Alpert School of Medicine, Providence, RI
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Hu JC, Belon C, Ravula NR, Durbin-Johnson B, Kurzrock EA. Impact of caudal block on revision rates after hypospadias repair: Multi-institution review. J Pediatr Urol 2023:S1477-5131(23)00053-0. [PMID: 36842912 DOI: 10.1016/j.jpurol.2023.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 02/01/2023] [Accepted: 02/07/2023] [Indexed: 02/13/2023]
Abstract
INTRODUCTION There is controversy surrounding the association between caudal block and complication rates after hypospadias repair. Conflicting results have been reported mostly from single-center, low volume studies and those that did not include relevant variables. OBJECTIVES We hypothesized that caudal block is not associated with increased rates of reoperation after primary repair and is associated with more complex hypospadias surgery. STUDY DESIGN The Clinical Practice Solutions Center database was queried to identify patients who received a primary hypospadias repair between 2009 and 2010. Primary hypospadias repair was further categorized as meatal advancement and glanduloplasty, distal, one-stage proximal, or one-stage perineal repair. Anesthesia coding was evaluated to identify those who received a caudal block. Any revision surgery was captured between 2009 and 2019 and the types of revision surgeries were identified. Variables such as caudal block, age, insurance type, surgeon volume, and surgeon years in practice were analyzed with mixed effects multiple logistic regression models. RESULTS The dataset query identified 3343 pediatric males who had primary hypospadias repair. The procedures were performed by 50 surgeons at 27 hospitals. Primary surgeries included meatal advancement and glanduloplasty (23%), distal (69%), proximal (6.9%), and perineal repairs (1%). Caudal block was administered to 42% of patients. Utilization of caudal block was not associated with type of primary surgery (p = 0.21). Adjusting for all other variables, increased patient age was associated with decreased usage of caudal block (p < 0.001). Analysis did not demonstrate a statistically significant association between utilization of caudal block with rates of revision surgery. CONCLUSIONS This large, multi-institution study demonstrates that the use of caudal block was not associated with more complex hypospadias surgery nor statistically significantly associated with increased rates of revision surgery after primary hypospadias repair.
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Affiliation(s)
- Jonathan C Hu
- University of California Davis Health, Department of Urologic Surgery, 4860 Y St Suite 3500, Sacramento, CA 95817, USA.
| | - Craig Belon
- University of California Davis Health, Department of Anesthesia and Pain Medicine. 4150 V Street, PSSB Suite 1200 Sacramento, CA 95817, USA.
| | - Niroop R Ravula
- University of California Davis Health, Department of Anesthesia and Pain Medicine. 4150 V Street, PSSB Suite 1200 Sacramento, CA 95817, USA.
| | - Blythe Durbin-Johnson
- University of California Davis Health School of Medicine, Division of Biostatistics. One Shields Avenue, Med Sci 1C, Room 145, Davis, CA 95616, USA.
| | - Eric A Kurzrock
- University of California Davis Health, Department of Urologic Surgery, 4860 Y St Suite 3500, Sacramento, CA 95817, USA.
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Muacevic A, Adler JR, Thompson TL, Oetgen ME. Case Volume Benchmarks During Residency and Fellowship Training for Pediatric Orthopedic Surgeons. Cureus 2022; 14:e32738. [PMID: 36686126 PMCID: PMC9851091 DOI: 10.7759/cureus.32738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022] Open
Abstract
Higher case volumes correlate with improved clinical outcomes across surgical specialties. This study establishes case volume benchmarks after completion of pediatric orthopedic fellowship training. Case logs for orthopedic surgery residents and pediatric orthopedic fellows at accredited programs were analyzed (2017-2018 to 2020-2021). Case volumes for pediatric orthopedic surgery were compared using parametric tests. Case logs from 3,000 orthopedic surgery residents and 149 pediatric orthopedic fellows were analyzed. There was an increase in total pediatric cases among orthopedic surgery residents over the study period (273 ± 68 to 285 ± 76, 1.1% annual increase, P<0.001). On average, pediatric orthopedic fellows reported 276 cases: Spine deformity (55 cases, 20%), foot and ankle deformity (45 cases, 16%), hip reconstruction (34 cases, 12%), limb deformity (32 cases, 12%), trauma lower limb (24 cases, 9%), treatment of supracondylar humerus fracture (23 cases, 8%), trauma upper limb (19 cases, 7%), clubfoot (18 cases, 7%), soft tissue procedures (13 cases, 5%), open treatment of femoral shaft fractures (6 cases, 2%), and treatment of infection (7 cases, 3%). Pediatric orthopedic fellows effectively doubled their pediatric case volume from fellowship training. The distribution of pediatric orthopedic fellow case volume percentiles was: 10th - 191 cases; 30th - 237 cases; 50th - 275 cases; 70th - 318 cases; 90th - 382 cases. Case volume benchmarks can help inform orthopedic trainees, faculty, and patients about the impact of pediatric orthopedic fellowship training. More research is needed to elucidate optimal training environments for future pediatric orthopedic surgeons.
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Surgeon case volume and the risk of complications following surgeries of displaced intra-articular calcaneal fracture. Foot Ankle Surg 2022; 28:1002-1007. [PMID: 35177328 DOI: 10.1016/j.fas.2022.02.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 01/20/2022] [Accepted: 02/10/2022] [Indexed: 02/04/2023]
Abstract
PURPOSE This study aimed to address the relationship between surgeon volume and the risk of complications following surgeries of displaced intra-articular calcaneal fractures (DIACFs). METHODS We retrospectively reviewed the medical records and the follow-up registers for patients who underwent open reduction and internal fixation with plate/screws in our center between January 2015 and June 2020. Surgeon volume was defined as the number of surgically treated calcaneal fractures within the past 12 months, and was dichotomized on basis of the optimal cut-off value. The outcome measure was the documented overall complications within 1 year after surgery. Four logistics regression models were constructed to examine the potential relationship between surgeon volume and complications. RESULTS Among 585 patients, 49 had documented complications, representing an overall rate of 8.4%. The overall complication rate was 20.0% (22/111) in patients operated on by the low-volume surgeons and 5.7% (27/474) by the high-volume surgeons, with a significant difference (p < 0.001). The 4 multivariate analyses showed steady and robust inverse volume-complication relationship, with OR ranging from 3.8 to 4.4. The restricted cubic splines adjusted for total covariates showed the non-linear fitting "L-shape" or "reverse J-shape" curve (p = 0.041), and the OR was reduced until 10 cases, beyond which the curve leveled. CONCLUSIONS Our findings reflected the important role of maintaining necessary operative cases, potentially informing optimized surgical care management.
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Matsumoto H, Larson EL, Warren SI, Hammoor BT, Bonsignore-Opp L, Troy MJ, Barrett KK, Striano BM, Li G, Terry MB, Roye BD, Lenke LG, Skaggs DL, Glotzbecker MP, Flynn JM, Roye DP, Vitale MG. A Clinical Risk Model for Surgical Site Infection Following Pediatric Spine Deformity Surgery. J Bone Joint Surg Am 2022; 104:364-375. [PMID: 34851324 DOI: 10.2106/jbjs.21.00751] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Despite tremendous efforts, the incidence of surgical site infection (SSI) following the surgical treatment of pediatric spinal deformity remains a concern. Although previous studies have reported some risk factors for SSI, these studies have been limited by not being able to investigate multiple risk factors at the same time. The aim of the present study was to evaluate a wide range of preoperative and intraoperative factors in predicting SSI and to develop and validate a prediction model that quantifies the risk of SSI for individual pediatric spinal deformity patients. METHODS Pediatric patients with spinal deformity who underwent primary, revision, or definitive spinal fusion at 1 of 7 institutions were included. Candidate predictors were known preoperatively and were not modifiable in most cases; these included 31 patient, 12 surgical, and 4 hospital factors. The Centers for Disease Control and Prevention definition of SSI within 90 days of surgery was utilized. Following multiple imputation and multicollinearity testing, predictor selection was conducted with use of logistic regression to develop multiple models. The data set was randomly split into training and testing sets, and fivefold cross-validation was performed to compare discrimination, calibration, and overfitting of each model and to determine the final model. A risk probability calculator and a mobile device application were developed from the model in order to calculate the probability of SSI in individual patients. RESULTS A total of 3,092 spinal deformity surgeries were included, in which there were 132 cases of SSI (4.3%). The final model achieved adequate discrimination (area under the receiver operating characteristic curve: 0.76), as well as calibration and no overfitting. Predictors included in the model were nonambulatory status, neuromuscular etiology, pelvic instrumentation, procedure time ≥7 hours, American Society of Anesthesiologists grade >2, revision procedure, hospital spine surgical cases <100/year, abnormal hemoglobin level, and overweight or obese body mass index. CONCLUSIONS The risk probability calculator encompassing patient, surgical, and hospital factors developed in the present study predicts the probability of 90-day SSI in pediatric spinal deformity surgery. This validated calculator can be utilized to improve informed consent and shared decision-making and may allow the deployment of additional resources and strategies selectively in high-risk patients. LEVEL OF EVIDENCE Prognostic Level III. See Instructions for Authors for a complete description of levels of evidence.
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Affiliation(s)
- Hiroko Matsumoto
- Department of Orthopaedic Surgery, Columbia University Irving Medical Center, New York, NY.,Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY
| | - Elaine L Larson
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY.,School of Nursing, Columbia University Irving Medical Center, New York, NY
| | - Shay I Warren
- Department of Orthopaedic Surgery, Stanford University, Redwood City, California
| | - Bradley T Hammoor
- Department of Orthopaedic Surgery, Columbia University Irving Medical Center, New York, NY
| | - Lisa Bonsignore-Opp
- Department of Orthopaedic Surgery, Columbia University Irving Medical Center, New York, NY
| | - Michael J Troy
- Department of Orthopedic Surgery, Harvard Medical School, Boston, Massachusetts
| | - Kody K Barrett
- Children's Orthopaedic Center, Children's Hospital Los Angeles, Los Angeles, California
| | - Brendan M Striano
- Department of Orthopaedic Surgery, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Gen Li
- Department of Biostatistics, University of Michigan School of Public Health, Ann Arbor, Michigan
| | - Mary Beth Terry
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY
| | - Benjamin D Roye
- Department of Orthopaedic Surgery, Columbia University Irving Medical Center, New York, NY
| | - Lawrence G Lenke
- Department of Orthopaedic Surgery, Columbia University Irving Medical Center, New York, NY
| | - David L Skaggs
- Spine Center, Cedars-Sinai Medical Center, Los Angeles, California
| | - Michael P Glotzbecker
- Department of Orthopaedic Surgery, Rainbow Babies and Children's Hospital, University Hospital Cleveland Medical Center, Cleveland, Ohio
| | - John M Flynn
- Department of Orthopaedic Surgery, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - David P Roye
- Department of Orthopaedic Surgery, Columbia University Irving Medical Center, New York, NY
| | - Michael G Vitale
- Department of Orthopaedic Surgery, Columbia University Irving Medical Center, New York, NY
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Racial and Ethnic Disparities in Obliterative Procedures for the Treatment of Vaginal Prolapse. Female Pelvic Med Reconstr Surg 2021; 27:e710-e715. [PMID: 34807885 DOI: 10.1097/spv.0000000000001116] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES Although racial disparities are well documented for common gynecologic surgical procedures, few studies have assessed racial disparities in the surgical treatment of vaginal prolapse. This study aimed to compare the use of obliterative procedures for the treatment of vaginal prolapse across racial and ethnic groups. STUDY DESIGN This is a retrospective cohort study of surgical cases from 2010 to 2018 from the American College of Surgeons National Surgical Quality Improvement Program, a nationally validated database. Cases were identified by Current Procedural Terminology codes. Modified Poisson regression was used to calculate risk ratios and 95% confidence intervals, adjusting for potential confounders selected a priori. RESULTS We identified 45,865 surgical cases, of which 10% involved an obliterative procedure. In the unadjusted model, non-Hispanic Asian and non-Hispanic Black patients were more likely to undergo an obliterative procedure compared with non-Hispanic White patients (risk ratio [95% confidence interval], 2.4 [2.1-2.7] and 1.2 [1.03-1.3], respectively). These relative risks were largely unchanged when controlling for age, body mass index, diabetes, American Society of Anesthesiologists classification, and concurrent hysterectomy. CONCLUSIONS Although both obliterative and reconstructive procedures have their respective risks and benefits, the proportion of patients undergoing each procedure differs by race and ethnicity. It is unclear whether such disparities may be attributable to differences in preference or inequity in care.
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Zhu Y, Qin S, Jia Y, Li J, Chen W, Zhang Q, Zhang Y. Surgeon volume and the risk of deep surgical site infection following open reduction and internal fixation of closed tibial plateau fracture. INTERNATIONAL ORTHOPAEDICS 2021; 46:605-614. [PMID: 34550417 DOI: 10.1007/s00264-021-05221-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 09/14/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Emerging evidences supported that the surgeon case volume significantly affected post-operative complications or outcomes following a range of elective or non-elective orthopaedic surgery; no data has been available for surgically treated tibial plateau fractures. We aimed to investigate the relationship between surgeon volume and the risk of deep surgical site infection (DSSI) following open reduction and internal fixation (ORIF) of closed tibial plateau fracture. METHODS This was a further analysis of the prospectively collected data. Adult patients undergoing ORIF procedure for closed tibial plateau fracture between January 2016 and December 2019 were included. Surgeon volume was defined as the number of surgically treated tibial fractures in the preceding 12 months and dichotomized on the basis of the optimal cut-off value determined by the receiver operating characteristic (ROC) curve. The outcome was DSSI within one year post-operatively. Multiple multivariate logistic models were constructed for "drilling down" adjustment of confounders. Sensitivity and subgroup analyses were performed to assess the robustness of outcome and identify the "optimal" subgroups. RESULTS Among 742 patients, 20 (2.7%) had a DSSI and 17 experienced re-operations. The optimal cut-off value for case volume was nine, and the low-volume surgeon was independently associated with 2.9-fold (OR, 2.9; 95%CI, 1.1 to 7.5) increased risk of DSSI in the totally adjusted multivariate model. The sensitivity analyses restricted to patients with original BMI data or those operated within 14 days after injury did not alter the outcomes (OR, 2.937, and 95%CI, 1.133 to 7.615; OR, 2.658, and 95%CI, 1.018 to 7.959, respectively). The subgroup analyses showed a trend to higher risk of DSSI for type I-IV fractures (OR, 4.6; 95%CI, 0.9 to 27.8) classified as Schatzker classification and substantially higher risk in patients with concurrent fractures (OR, 6.1; 95%CI, 1.0 to 36.5). CONCLUSION The surgeon volume is independently associated with the rate of DSSI, and a number of ≥ nine cases/year are necessarily kept for reducing DSSIs; patients with concurrent fractures should be preferentially operated on by high-volume surgeons.
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Affiliation(s)
- Yanbin Zhu
- Department of Orthopaedic Surgery, the 3Rd Hospital of Hebei Medical University, Shijiazhuang, 050051, Hebei, People's Republic of China.,Key Laboratory of Biomechanics of Hebei Province, Shijiazhuang, 050051, Hebei, People's Republic of China.,Orthopaedic Institution of Hebei Province, Shijiazhuang, 050051, Hebei, People's Republic of China.,NHC Key Laboratory of Intelligent Orthopaedic Equipment, Shijiazhuang, 050051, Hebei, People's Republic of China
| | - Shiji Qin
- Department of Orthopaedic Surgery, the 3Rd Hospital of Hebei Medical University, Shijiazhuang, 050051, Hebei, People's Republic of China.,Key Laboratory of Biomechanics of Hebei Province, Shijiazhuang, 050051, Hebei, People's Republic of China.,Orthopaedic Institution of Hebei Province, Shijiazhuang, 050051, Hebei, People's Republic of China.,NHC Key Laboratory of Intelligent Orthopaedic Equipment, Shijiazhuang, 050051, Hebei, People's Republic of China
| | - Yuxuan Jia
- Basic Medicine School of Hebei Medical University, Shijiazhuang, 050000, Hebei, People's Republic of China
| | - Junyong Li
- Department of Orthopaedic Surgery, the 3Rd Hospital of Hebei Medical University, Shijiazhuang, 050051, Hebei, People's Republic of China.,Key Laboratory of Biomechanics of Hebei Province, Shijiazhuang, 050051, Hebei, People's Republic of China.,Orthopaedic Institution of Hebei Province, Shijiazhuang, 050051, Hebei, People's Republic of China.,NHC Key Laboratory of Intelligent Orthopaedic Equipment, Shijiazhuang, 050051, Hebei, People's Republic of China
| | - Wei Chen
- Department of Orthopaedic Surgery, the 3Rd Hospital of Hebei Medical University, Shijiazhuang, 050051, Hebei, People's Republic of China.,Key Laboratory of Biomechanics of Hebei Province, Shijiazhuang, 050051, Hebei, People's Republic of China.,Orthopaedic Institution of Hebei Province, Shijiazhuang, 050051, Hebei, People's Republic of China.,NHC Key Laboratory of Intelligent Orthopaedic Equipment, Shijiazhuang, 050051, Hebei, People's Republic of China
| | - Qi Zhang
- Department of Orthopaedic Surgery, the 3Rd Hospital of Hebei Medical University, Shijiazhuang, 050051, Hebei, People's Republic of China. .,Key Laboratory of Biomechanics of Hebei Province, Shijiazhuang, 050051, Hebei, People's Republic of China. .,Orthopaedic Institution of Hebei Province, Shijiazhuang, 050051, Hebei, People's Republic of China. .,NHC Key Laboratory of Intelligent Orthopaedic Equipment, Shijiazhuang, 050051, Hebei, People's Republic of China.
| | - Yingze Zhang
- Department of Orthopaedic Surgery, the 3Rd Hospital of Hebei Medical University, Shijiazhuang, 050051, Hebei, People's Republic of China. .,Key Laboratory of Biomechanics of Hebei Province, Shijiazhuang, 050051, Hebei, People's Republic of China. .,Orthopaedic Institution of Hebei Province, Shijiazhuang, 050051, Hebei, People's Republic of China. .,NHC Key Laboratory of Intelligent Orthopaedic Equipment, Shijiazhuang, 050051, Hebei, People's Republic of China. .,Chinese Academy of Engineering, Beijing, 100088, People's Republic of China.
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11
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Fields MW, Lee NJ, Ball JR, Boddapati V, Mathew J, Hong D, Coury JR, Sardar ZM, Roye B, Vitale M, Lenke LG. Spinal fusion in pediatric patients with marfan syndrome: a nationwide assessment on short-term outcomes and readmission risk. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2020; 30:775-787. [PMID: 33078267 DOI: 10.1007/s00586-020-06645-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 09/01/2020] [Accepted: 10/13/2020] [Indexed: 10/23/2022]
Abstract
PURPOSE The purpose of this study was to utilize the National Readmission Database (NRD) to determine estimates for complication rates, 90-day readmission rates, and hospital costs associated with spinal fusion in pediatric patients with Marfan syndrome. METHODS The 2012-2015 NRD databases were queried for all pediatric (< 19 years old) patients diagnosed with Marfan syndrome undergoing spinal fusion surgery. The primary outcome variables in this study were index admission complications and 90-day readmissions. RESULTS A total of 249 patients with Marfan syndrome underwent spinal fusion surgery between 2012 and 2015 (mean age ± standard deviation at the time of surgery: 14 ± 2.0, 132 (53%) female). 25 (10.1%) were readmitted within 90 days of the index hospital discharge date. Overall, 59.7% of patients experienced at least one complication during the index admission. Unplanned 90-day readmission could be predicted by older age (odds ratio 2.3, 95% confidence interval 1.3-4.2, p = 0.006), Medicaid insurance status (56.0, 3.8-820.0, p = 0.003), and experiencing an inpatient medical complication (42.9, 4.6-398.7, p = 0.001). Patients were readmitted for wound dehiscence (8 patients, 3.2%), nervous system related complications (3 patients, 1.2%), and postoperative infectious related complications (4 patients, 1.6%). CONCLUSION This study is the first to demonstrate on a national level the complications and potential risk factors for 90-day hospital readmission for patients with Marfan syndrome undergoing spinal fusion. Patients with Marfan syndrome undergoing spinal fusion often present with multiple medical comorbidities that must be managed carefully perioperatively to reduce inpatient complications and early hospital readmissions.
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Affiliation(s)
- Michael W Fields
- Department of Orthopaedics, Columbia University Medical Center, The Och Spine Hospital at New York-Presbyterian, 161 Fort Washington Avenue, New York, NY, USA.
| | - Nathan J Lee
- Department of Orthopaedics, Columbia University Medical Center, The Och Spine Hospital at New York-Presbyterian, 161 Fort Washington Avenue, New York, NY, USA
| | - Jacob R Ball
- Department of Orthopaedics, Columbia University Medical Center, The Och Spine Hospital at New York-Presbyterian, 161 Fort Washington Avenue, New York, NY, USA
| | - Venkat Boddapati
- Department of Orthopaedics, Columbia University Medical Center, The Och Spine Hospital at New York-Presbyterian, 161 Fort Washington Avenue, New York, NY, USA
| | - Justin Mathew
- Department of Orthopaedics, Columbia University Medical Center, The Och Spine Hospital at New York-Presbyterian, 161 Fort Washington Avenue, New York, NY, USA
| | - Daniel Hong
- Department of Orthopaedics, Columbia University Medical Center, The Och Spine Hospital at New York-Presbyterian, 161 Fort Washington Avenue, New York, NY, USA
| | - Josephine R Coury
- Department of Orthopaedics, Columbia University Medical Center, The Och Spine Hospital at New York-Presbyterian, 161 Fort Washington Avenue, New York, NY, USA
| | - Zeeshan M Sardar
- Department of Orthopaedics, Columbia University Medical Center, The Och Spine Hospital at New York-Presbyterian, 161 Fort Washington Avenue, New York, NY, USA
| | - Benjamin Roye
- Department of Pediatric Orthopedics, Columbia University Medical Center, Morgan Stanley Children's Hospital at New York-Presbyterian, New York, NY, USA
| | - Michael Vitale
- Department of Pediatric Orthopedics, Columbia University Medical Center, Morgan Stanley Children's Hospital at New York-Presbyterian, New York, NY, USA
| | - Lawrence G Lenke
- Department of Orthopaedics, Columbia University Medical Center, The Och Spine Hospital at New York-Presbyterian, 161 Fort Washington Avenue, New York, NY, USA
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12
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Lin T, Meng D, Yin J, Ji Z, Shao W, Han M, Lai A, Gao R, Zhou X, Meng Y. Influence of Insurance Status on Curve Magnitude in Adolescent Idiopathic Scoliosis in Mainland China. Global Spine J 2020; 10:754-759. [PMID: 32707014 PMCID: PMC7383796 DOI: 10.1177/2192568219875121] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
STUDY DESIGN Retrospective cohort study. OBJECTIVES To determine whether there is an association between insurance status and curve magnitude in idiopathic scoliosis pediatric patients in mainland China. METHODS Medical records of patients with adolescent idiopathic scoliosis in 4 tertiary spine centers across China from January 2013 to December 2017 were analyzed. Data was extracted on insurance status, curve magnitude, recommended treatment at presentation, source of referral, and treatment initiated. Additional information was collected for patients requiring corrective surgery, including time from recommendation for surgery to surgery and clinically relevant parameters such as, postoperative complications, and pre-/postoperative Scoliosis Research Society-22 scores were also collected for patients requiring corrective surgery. RESULTS Of the 1785 patients included, 1032 were Urban Resident Basic Medical Insurance Scheme (URBMS) insured and 753 were New Rural Cooperative Medical Scheme (NRCMS) insured. NRCMS patients presented with a larger major curve than URBMS patients (32.9° ± 15.1° vs 29.3° ± 12.6°, P = .028). For patients having surgery recommended, NRCMS patients presented with a larger mean Cobb angle at the first presentation (57.7° vs 50.9°, P < .0001) and at time of surgery (61.3° vs 52.2°, P < .0001), and experienced a significantly longer time from surgery recommendation to decision for surgery. Complication rates were comparable between the 2 groups, except for pulmonary complications (NRCMS 7.3% vs URBMS 2.8%, P = .04). Postoperatively, patients covered by NRCMS insurance experienced greater overall improvement in health-related quality of life and were less satisfied with the treatments. CONCLUSIONS This study shows that health insurance may influence the severity of scoliosis on presentation, with implications on early diagnosis and surgery time.
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Affiliation(s)
- Tao Lin
- Shanghai Changzheng Hospital, Second Military Medical University, Shanghai 200003 Shanghai, People’s Republic of China
| | - Depeng Meng
- Shanghai Changzheng Hospital, Second Military Medical University, Shanghai 200003 Shanghai, People’s Republic of China
| | - Jia Yin
- Shanghai Changzheng Hospital, Second Military Medical University, Shanghai 200003 Shanghai, People’s Republic of China
| | - Zhe Ji
- Shanghai Changzheng Hospital, Second Military Medical University, Shanghai 200003 Shanghai, People’s Republic of China,Xinjiang Uygur Autonomous Region People’s Hospital, Urumqi, People’s Republic of China
| | - Wei Shao
- Shanghai Changzheng Hospital, Second Military Medical University, Shanghai 200003 Shanghai, People’s Republic of China,359th Hospital of PLA, Zhenjiang, People’s Republic of China
| | - Meng Han
- Xuzhou Central Hospital, Xuzhou, People’s Republic of China
| | - Aining Lai
- 98th Hospital of PLA, Huzhou, People’s Republic of China
| | - Rui Gao
- Shanghai Changzheng Hospital, Second Military Medical University, Shanghai 200003 Shanghai, People’s Republic of China
| | - Xuhui Zhou
- Shanghai Changzheng Hospital, Second Military Medical University, Shanghai 200003 Shanghai, People’s Republic of China
| | - Yichen Meng
- Shanghai Changzheng Hospital, Second Military Medical University, Shanghai 200003 Shanghai, People’s Republic of China,Yichen Meng, Department of Orthopedics, Shanghai Changzheng Hospital, Second Military Medical University, 415 Fengyang Road, Shanghai, 200003, People's Republic of China.
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13
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DelPizzo K, Wilson LA, Fiasconaro M, Liu J, Bekeris J, Poeran J, Memtsoudis SG. Trends and Outcomes in Pediatric Patients Undergoing Scoliosis Repair: A Population-Based Study. Anesth Analg 2020; 131:1890-1900. [DOI: 10.1213/ane.0000000000005087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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14
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Early and late hospital readmissions after spine deformity surgery in children with cerebral palsy. Spine Deform 2020; 8:507-516. [PMID: 32130680 DOI: 10.1007/s43390-019-00007-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 10/06/2019] [Indexed: 10/24/2022]
Abstract
STUDY DESIGN Retrospective review of a prospectively collected multicenter registry of pediatric patients with cerebral palsy (CP) and neuromuscular scoliosis (NMS) undergoing spinal fusion. OBJECTIVE To define risk factors for unplanned readmission after elective spinal deformity surgery. Patients with CP and NMS have high rates of hospital readmission; however, risk factors for readmission are not well established. METHODS Univariate and multivariate analyses were used to compare the demographics, operative and postoperative course, radiographic characteristics, and preoperative Caregiver Priorities and Child Health Index of Life with Disabilities (CPCHILD) questionnaires of patients who did not require readmission to those who required either early readmission (within 90 days of the index surgery) or late readmission (readmission after 90 days). RESULTS Of the 218 patients identified, 19 (8.7%) required early readmission, while 16 (7.3%) required late readmission. Baseline characteristics were similar between the three cohorts. On univariate analysis, early readmission was associated with longer duration of surgery (p < 0.001) and larger magnitude of residual deformity (p = 0.003 and p = 0.029 for postoperative major and minor angles, respectively). The health score of the CPCHILD Questionnaire was lower in patients who required early readmission than in those who did not require readmission (p = 0.032). On multivariate analysis, oral feeding status was inversely related to early readmission (less likely to require readmission), while decreasing lumbar lordosis and increasing length of surgery were related to an increased likelihood of early readmission. CONCLUSIONS In patients with CP and NMS, longer surgical time, larger residual major and minor Cobb angles, lumbar lordosis, feeding status, and overall health may be related to a greater likelihood for early hospital readmission after elective spinal fusion. No factors were identified that correlated with an increased need for late hospital readmission after elective spinal fusion in patients with CP. LEVEL OF EVIDENCE IV.
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15
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Gallo MC, Bolia IK, Jalali O, Rosario S, Rounds A, Heidari KS, Trasolini NA, Prodromo JP, Hatch GF, Weber AE. Risk Factors for Early Subsequent (Revision or Contralateral) ACL Reconstruction: A Retrospective Database Study. Orthop J Sports Med 2020; 8:2325967119901173. [PMID: 32118083 PMCID: PMC7029539 DOI: 10.1177/2325967119901173] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 11/06/2019] [Indexed: 12/23/2022] Open
Abstract
Background: Many factors contribute to the risk for subsequent anterior cruciate ligament reconstruction (ACLR) within 2 years from the index procedure. Purpose/Hypothesis: The purpose of this study was 2-fold: (1) to evaluate the incidence of subsequent (revision or contralateral) ACLR at 2 years in a large cohort and (2) to explore the association between patient-specific factors and early subsequent ACLR risk by age group. We hypothesize that 2-year subsequent (revision or contralateral) ACLR rates will be low and that risk factors for subsequent (revision or contralateral) ACLR will vary depending on a patient’s age group. Study Design: Case-control study; Level of evidence, 3. Methods: The California Office of Statewide Health Planning and Development Ambulatory Surgery Database was retrospectively reviewed to assess the incidence of 2-year subsequent (revision or contralateral) ACLR and to identify patient-specific risk factors for early subsequent (revision or contralateral) ACLR by age group between 2005 and 2014. Results: Of 94,108 patients included, the rate of subsequent (revision or contralateral) ACLR was highest in patients younger than 21 years (2.4 per 100 person-years; 95% CI, 2.3-2.6) and lowest in those older than 40 years (1.3 per 100 person-years; 95% CI, 1.2-1.4). Younger age, white race (compared with Hispanic in all age groups and Asian in age <21 or >40 years), private insurance if age younger than 21 years, public insurance or worker's compensation claims if age older than 30 years were significantly associated with an increased risk of subsequent (revision or contralateral) ACLR at 2 years. Conclusion: Results of the present study provide insight into subsequent (revision or contralateral) ACL reconstruction, which can be used to assess and modify treatment for at-risk patients and highlight the need for data mining to generate clinically applicable research using national and international databases.
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Affiliation(s)
- Matthew C Gallo
- University of Southern California Keck School of Medicine, Los Angeles, California, USA
| | - Ioanna K Bolia
- Epstein Family Center for Sports Medicine at Keck Medicine of USC, Los Angeles, California, USA
| | - Omid Jalali
- University of Southern California Keck School of Medicine, Los Angeles, California, USA
| | - Santano Rosario
- University of Southern California Keck School of Medicine, Los Angeles, California, USA
| | - Alexis Rounds
- University of Southern California Keck School of Medicine, Los Angeles, California, USA
| | - Keemia Soraya Heidari
- University of Southern California Keck School of Medicine, Los Angeles, California, USA
| | - Nicholas A Trasolini
- Epstein Family Center for Sports Medicine at Keck Medicine of USC, Los Angeles, California, USA
| | - John P Prodromo
- Epstein Family Center for Sports Medicine at Keck Medicine of USC, Los Angeles, California, USA
| | - George Frederick Hatch
- Epstein Family Center for Sports Medicine at Keck Medicine of USC, Los Angeles, California, USA
| | - Alexander Evan Weber
- Epstein Family Center for Sports Medicine at Keck Medicine of USC, Los Angeles, California, USA
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Abstract
STUDY DESIGN Systematic review. OBJECTIVE To assess the impact of hospital volume on postoperative outcomes in spine surgery. SUMMARY OF BACKGROUND DATA Several strategies have recently been proposed to optimize provider outcomes, such as regionalization to higher volume centers and setting volume benchmarks. MATERIALS AND METHODS We performed a systematic review examining the association between hospital volume and spine surgery outcomes. To be included in the review, the study population had to include patients undergoing a primary or revision spinal procedure. These included anterior/posterior cervical fusions, anterior/posterior lumbar fusions, laminectomies, discectomies, spinal deformity surgeries, and surgery for spinal malignancies. We searched the Pubmed, OVID MEDLINE (1966-2018), Google Scholar, and Web of Science (1900-2018) databases in January 2018 using the search criteria ("Hospital volume" OR "volume" OR "volume-outcome" OR "volume outcome") AND ("spine" OR "spine surgery" OR "lumbar" OR "cervical" OR "decompression" OR "deformity" OR "fusions"). There were no restrictions placed on study design, publication date, or language. The studies were evaluated with respect to the quality of methodology as outlined by the Grading of Recommendations Assessment, Development, and Evaluation system. RESULTS Twelve studies were included in the review. Studies were variable in defining hospital volume thresholds. Higher hospital volume was associated with statistically significant lower risks of postoperative complications, a shorter length of stay, lower cost of hospital stay, and a lower risk of readmissions and reoperations/revisions. CONCLUSIONS Our findings suggest a trend toward better outcomes for higher volume hospitals; however, further study needs to be carried out to define objective volume thresholds for specific spine surgeries for hospitals to use as a marker of proficiency.
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17
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Wiegers EJA, Sewalt CA, Venema E, Schep NWL, Verhaar JAN, Lingsma HF, Den Hartog D. The volume-outcome relationship for hip fractures: a systematic review and meta-analysis of 2,023,469 patients. Acta Orthop 2019; 90:26-32. [PMID: 30712501 PMCID: PMC6366538 DOI: 10.1080/17453674.2018.1545383] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Background and purpose - It has been hypothesized that hospitals and surgeons with high caseloads of hip fracture patients have better outcomes, but empirical studies have reported contradictory results. This systematic review and meta-analysis evaluates the volume-outcome relationship among patients with hip fracture patients. Methods - A search of different databases was performed up to February 2018. Selection of relevant studies, data extraction, and critical appraisal of the methodological quality was performed by 2 independent reviewers. A random-effects meta-analysis using studies with comparative cut-offs was performed to estimate the effect of hospital and surgeon volume on outcome, defined as in-hospital mortality and postoperative complications. Results - 24 studies comprising 2,023,469 patients were included. Overall, the quality was reasonable. 11 studies reported better health outcomes in high-volume centers and 2 studies reported better health outcomes in low-volume centers. In the meta-analysis of 11 studies there was a statistically non-significant association between higher hospital volume and both lower in-hospital mortality (adjusted odds ratio (aOR) 0.87, 95% confidence interval (CI) 0.73-1.04) and fewer postoperative complications (aOR 0.87, CI 0.75-1.02). Four studies on surgeon volume were included in the meta-analysis and showed a minor association between higher surgeon volume and in-hospital mortality (aOR 0.92, CI 0.76-1.12). Interpretation - This systematic review and meta-analysis did not find an evident effect of hospital or surgeon volume on health outcomes. Future research without volume cut-offs is needed to examine whether a true volume-outcome relationship exists.
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Affiliation(s)
- Eveline J A Wiegers
- Department of Public Health, Erasmus University Medical Center, Rotterdam; ,Correspondence:
| | - Charlie A Sewalt
- Department of Public Health, Erasmus University Medical Center, Rotterdam;
| | - Esmee Venema
- Department of Public Health, Erasmus University Medical Center, Rotterdam; ,Department of Neurology, Erasmus University Medical Center, Rotterdam;
| | | | - Jan A N Verhaar
- Department of Orthopaedics, Erasmus University Medical Center, Rotterdam;
| | - Hester F Lingsma
- Department of Public Health, Erasmus University Medical Center, Rotterdam;
| | - Dennis Den Hartog
- Department of Surgery-Traumatology, Erasmus University Medical Center, Rotterdam, The Netherlands
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18
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Suchman KI, Behery OA, Mai DH, Anil U, Bosco JA. The Demographic and Geographic Trends of Meniscal Procedures in New York State: An Analysis of 649,470 Patients Over 13 years. J Bone Joint Surg Am 2018; 100:1581-1588. [PMID: 30234622 DOI: 10.2106/jbjs.17.01341] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND The purpose of this study was to examine the geographic and demographic variations and time trends of different types of meniscal procedures in New York State to determine whether disparities exist in access to treatment. METHODS The New York Statewide Planning and Research Cooperative System (SPARCS) outpatient database was reviewed to identify patients who underwent elective, primary knee arthroscopy between January 1, 2003, and December 31, 2015, for 1 of the following diagnosis-related categories: Group 1, meniscectomy; Group 2, meniscal repair; and Group 3, meniscal allograft transplantation, with or without anterior cruciate ligament reconstruction (ACLR). The 3 groups of meniscal procedures were compared on geographic distribution, patient age, insurance, concomitant ACLR, and surgeon and hospital volume over the study period. RESULTS A total of 649,470 patients who underwent knee arthroscopy between 2003 and 2015 were identified for analysis. Both meniscectomies and meniscal repairs had a scattered distribution throughout New York State, with allograft volume concentrated at urban academic hospitals. The majority of patients who underwent any meniscal procedure had private insurance, with Medicaid patients having the lowest rates of meniscal surgery. At high-volume hospitals, meniscal repairs and allografts are being performed with increasing frequency, especially in patients <25 years of age. Meniscal repairs are being performed concomitantly with ACLR with increasing frequency. CONCLUSIONS Meniscal repairs and allografts are being performed at high-volume hospitals for privately insured patients with increasing frequency. Geographic access to these treatments, particularly allografts, is limited. CLINICAL RELEVANCE Disparities in the availability of advanced meniscal treatment require further investigation and understanding to improve access to care.
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Affiliation(s)
- Kelly I Suchman
- Division of Sports Medicine, Department of Orthopedic Surgery, NYU Langone Orthopedic Hospital, New York, NY.,Icahn School of Medicine at Mount Sinai, New York, NY
| | - Omar A Behery
- Icahn School of Medicine at Mount Sinai, New York, NY
| | - David H Mai
- Icahn School of Medicine at Mount Sinai, New York, NY
| | - Utkarsh Anil
- Icahn School of Medicine at Mount Sinai, New York, NY
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Drivers of Medicare Reimbursement for Thoracolumbar Fusion: An Analysis of Data From The Centers For Medicare and Medicaid Services. Spine (Phila Pa 1976) 2017; 42:1648-1656. [PMID: 28338572 DOI: 10.1097/brs.0000000000002171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN A retrospective observational study. OBJECTIVE The purpose of this study is to examine the variation in thoracolumbar fusion (TLF) payment and determine the drivers of this variation. SUMMARY OF BACKGROUND DATA As health care spending continues to increase, variation in surgical procedures reimbursements has come under more scrutiny. TLF is an example of a high-cost, proven-benefit procedure that is often the focus of Centers for Medicare and Medicaid Services (CMS) administrators. There is a wide variation in TLF charges, but the drivers for this variation are not clear. METHODS Claims for TLF were identified in the CMS data by analyzing Diagnosis Related Group (DRG) number 460 ("Spinal Fusion Except Cervical without Major Complications or Comorbidities"). Data on factors that may impact cost of care were collected from four sources: the United States Census Bureau, CMS, the Dartmouth Atlas, and WWAMI Rural Health Research Center. These were then grouped into seven categories: quality, supply, demand, substitute treatment availability, patient characteristics, competitive factors, and provider characteristics. Predictive reimbursement models were created from the data using multivariate linear regression to understand the factors that influence TLF reimbursement. RESULTS There was significant geographic variability in reimbursement. The largest contribution to reimbursement variation came from variables in the demand (ΔR = 13.4%, P < 0.001), supply (ΔR = 9.2%, P < 0.001), and competitive factor domains (ΔR = 9.1%, P < 0.001). The top three drivers that increased reimbursement were provider charges (β = 0.37, P < 0.001), total Medicare reimbursement in the region (β = 0.19, P < 0.001), and the number of spinal surgeries per 1000 patients in that region (β = 0.06, P = 0.02). Institutional volume, a surrogate for quality was negatively associated with TLF reimbursement. CONCLUSION There was wide variation in reimbursement for TLF across the U.S. The variables that drive TLF reimbursement variation include supply, demand, and competition. Interestingly, quality of care was not associated with increased TLF reimbursement. LEVEL OF EVIDENCE N/A.
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Okike K, Chan PH, Paxton EW. Effect of Surgeon and Hospital Volume on Morbidity and Mortality After Hip Fracture. J Bone Joint Surg Am 2017; 99:1547-1553. [PMID: 28926384 DOI: 10.2106/jbjs.16.01133] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Prior studies have examined the relationship between surgeon and hospital volumes and outcome following hip fracture surgical procedures, but the results have been inconclusive. The purpose of this study was to assess the hip fracture volume-outcome relationship by analyzing data from a large, managed care registry. METHODS The Kaiser Permanente Hip Fracture Registry prospectively records information on surgically treated hip fractures within the managed health-care system. Using this registry, all surgically treated hip fractures in patients 60 years of age or older were identified. Surgeon and hospital volume were defined as the number of hip fracture surgical procedures performed in the preceding 12 months and were divided into tertiles (low, medium, and high). The primary outcome was mortality at 1 year postoperatively. Secondary outcomes were mortality at 30 and 90 days postoperatively as well as reoperation (lifetime), medical complications (90-day), and unplanned readmission (30-day). To determine the relationship between volume and these outcome measures, multivariate logistic and Cox proportional hazards regression were performed, controlling for potentially confounding variables. RESULTS Of 14,294 patients in the study sample, the majority were female (71%) and white (79%), and the mean age was 81 years. The overall mortality rate was 6% at 30 days, 11% at 90 days, and 21% at 1 year. We did not find an association between surgeon or hospital volume and mortality at 30 days, 90 days, or 1 year (p > 0.05). There was also no association between surgeon or hospital volume and reoperation, medical complications, or unplanned readmission (p > 0.05). CONCLUSIONS In this analysis of hip fractures treated in a large integrated health-care system, the observed rates of mortality, reoperation, medical complications, and unplanned readmission did not differ by surgeon or hospital volume. In contrast to other orthopaedic procedures, such as total joint arthroplasty, our data do not suggest that hip fractures need to be preferentially directed toward high-volume surgeons or hospitals for treatment. LEVEL OF EVIDENCE Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.
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Affiliation(s)
- Kanu Okike
- 1Department of Orthopaedics, Kaiser Moanalua Medical Center, Honolulu, Hawaii 2Surgical Outcomes and Analysis Department, Kaiser Permanente, San Diego, California
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Roddy E, Diab M. Rates and risk factors associated with unplanned hospital readmission after fusion for pediatric spinal deformity. Spine J 2017; 17:369-379. [PMID: 27765710 DOI: 10.1016/j.spinee.2016.10.008] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 09/01/2016] [Accepted: 10/12/2016] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Short-term readmission rates are becoming widely used as a quality and performance metric for hospitals. Data on unplanned short-term readmission after spine fusion for deformity in pediatric patients are limited. PURPOSE To characterize the rate and risk factors for short-term readmission after spine fusion for deformity in pediatric patients. STUDY DESIGN This is a retrospective cohort study. PATIENT SAMPLE Data were obtained from the State Inpatient Database from New York, Utah, Nebraska, Florida, North Carolina (years 2006-2010), and California (years 2006-2011). OUTCOME MEASURES Outcome measures included 30- and 90-day readmission rates. MATERIALS AND METHODS Inclusion criteria were patients aged 0-21 years, a primary diagnosis of spine deformity, and a primary 3+-level lumbar or thoracic fusion. Exclusion criteria included revision surgery at index admission and cervical fusion. Readmission rates were calculated and logistic analyses were used to identify independent predictors of readmission. RESULTS There were a total of 13,287 patients with a median age of 14 years. Sixty-seven percent were girls. The overall 30- and 90-day readmission rates were 4.7% and 6.1%. The most common reasons for readmission were infection (38% at 30 days and 33% at 90 days), wound dehiscence (19% and 17%), and pulmonary complications (12% and 13%). On multivariate analysis, predictors of 30-day readmission included male sex (p=.008), neuromuscular (p<.0001) or congenital scoliosis (p=.006), Scheuermann kyphosis (p=.003), Medicaid insurance (p<.0001), length of stay of ≤3 days or ≥6 days (p<.0001), and surgery at a teaching hospital (p=.011). Surgery at a hospital performing >80 operations/year was associated with a 34% reduced risk of 30-day readmission (95% confidence interval 12%-50%, p=.005) compared with hospitals performing <20 operations/year. CONCLUSIONS The short-term readmission rate for pediatric spine deformity surgery is driven by patient-related factors, as well as several risk factors that may be modified to reduce this rate.
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Affiliation(s)
- Erika Roddy
- University of California, San Francisco (UCSF) School of Medicine, 513 Parnassus Ave, San Francisco, CA 94143, USA
| | - Mohammad Diab
- Department of Orthopædic Surgery, UCSF, 500 Parnassus Ave, MU 320-W, San Francisco, CA 94143, USA.
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Abstract
STUDY DESIGN Retrospective review of an administrative database. OBJECTIVE To observe New York statewide trends in lumbar spine surgery and to compare utilization of fusion according to hospital size and patient population. SUMMARY OF BACKGROUND DATA Over the last 30 years, studies have indicated increasing rates of spinal fusion procedures performed each year in the United States. There is no study investigating potential variability in this trend according to hospital volume. METHODS New York Statewide Planning and Research Cooperative System (SPARCS) administrative data were used to identify 228,882 lumbar spine surgery patients. New York State hospitals were categorized as low-, medium-, or high-volume and descriptive statistics were used to determine trends in spinal fusion. RESULTS The number of fusions per year increased 55% from 2005 to 2014. The ratio of fusion to nonfusion surgery increased from 0.88 to 2.67 at high-volume, from 0.84 to 2.30 at medium- volume, and from 0.66 to 1.52 at low-volume hospitals. In 2014, 22% of spine surgery patients at low-volume hospitals were either African Americans or Hispanics compared with 12% and 14% at high- and medium-volume hospitals, respectively. At high-volume hospitals, 33% of patients were privately insured and 3% had Medicare compared with 30% and 6% at low-volume hospitals. CONCLUSION The annual number of lumbar spinal fusions continues to increase, especially at high- and medium-volume hospitals. The percentage of patients treated surgically for lumbar spinal stenosis that undergoes fusion ranges from 53.2 to 66.4% depending on hospital volume. Individual surgeon opinion, patient disease characteristics, and socioeconomic factors may affect surgical decision making. Caucasians and private insurance patients most often receive care at high-volume hospitals. Minorities and patients with Medicaid are over-represented at low-volume centers where fusions are less often performed. Accessibility to care at high-volume centers remains a major concern for these vulnerable populations. LEVEL OF EVIDENCE 3.
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Manson NA, Green AJ, Abraham EP. Elevated Patient Body Mass Index Does Not Negatively Affect Self-Reported Outcomes of Thoracolumbar Surgery: Results of a Comparative Observational Study with Minimum 1-Year Follow-Up. Global Spine J 2016; 6:108-17. [PMID: 26933611 PMCID: PMC4771507 DOI: 10.1055/s-0035-1556585] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Accepted: 05/06/2015] [Indexed: 11/19/2022] Open
Abstract
Study Design Retrospective study. Objective Quantify the effect of obesity on elective thoracolumbar spine surgery patients. Methods Five hundred consecutive adult patients undergoing thoracolumbar spine surgery to treat degenerative pathologies with minimum follow-up of at least 1 year were included. Primary outcome measures included Numerical Rating Scales for back and leg pain, the Short Form 36 Physical Component Summary and Mental Component Summary, the modified Oswestry Disability Index, and patient satisfaction scores collected preoperatively and at 3, 6, 12, and 24 months postoperatively. Secondary outcome measures included perioperative and postoperative adverse events, postoperative emergency department presentation, hospital readmission, and revision surgeries. Patients were grouped according to World Health Organization body mass index (BMI) guidelines to isolate the effect of obesity on primary and secondary outcome measures. Results Mean BMI was 30 kg/m(2), reflecting a significantly overweight population. Each BMI group reported statistically significant improvement on all self-reported outcome measures. Contrary to our hypothesis, however, there was no association between BMI group and primary outcome measures. Patients with BMI of 35 to 39.99 visited the emergency department with complaints of pain significantly more often than the other groups. Otherwise, we did not detect any differences in the secondary outcome measures between BMI groups. Conclusions Patients of all levels of obesity experienced significant improvement following elective thoracolumbar spine surgery. These outcomes were achieved without increased risk of postoperative complications such as infection and reoperation. A risk-benefit algorithm to assist with surgical decision making for obese patients would be valuable to surgeons and patients alike.
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Affiliation(s)
- Neil A. Manson
- Canada East Spine Centre, Saint John, New Brunswick, Canada,Department of Orthopaedic Surgery, Saint John Regional Hospital, Saint John, New Brunswick, Canada,Department of Orthopaedic Surgery, Dalhousie University, Halifax, Nova Scotia, Canada,Address for correspondence Neil A. Manson, MD, FRCSC 555 Somerset Street, Suite 200Saint John, New BrunswickCanada E2K 4X2
| | - Alana J. Green
- Canada East Spine Centre, Saint John, New Brunswick, Canada,Department of Orthopaedic Surgery, Saint John Regional Hospital, Saint John, New Brunswick, Canada
| | - Edward P. Abraham
- Canada East Spine Centre, Saint John, New Brunswick, Canada,Department of Orthopaedic Surgery, Saint John Regional Hospital, Saint John, New Brunswick, Canada,Department of Orthopaedic Surgery, Dalhousie University, Halifax, Nova Scotia, Canada
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Abstract
STUDY DESIGN A retrospective review of an administrative database. OBJECTIVE The purpose of this study is to determine the current extent of regionalization by mapping lumbar spine procedures according to hospital and patient zip code, as well as examine the rate of growth of lumbar spine procedures performed at high-, medium-, and low-volume institutions in New York State. SUMMARY OF BACKGROUND DATA The association between hospital and spine surgeon volume and improved patient outcomes is well established. There is no study investigating the actual process of patient migration to high-volume hospitals. METHODS New York Statewide Planning and Research Cooperative System (SPARCS) administrative data were used to identify 228,695 lumbar spine surgery patients from 2005 to 2014. The data included the patients' zip code, hospital of operation, and year of discharge. The volume of lumbar spine surgery in New York State was mapped according to patient and hospital 3-digit zip code. New York State hospitals were categorized as low, medium, and high volume and descriptive statistics were used to determine trends in changes in hospital volume. RESULTS Lumbar spine surgery recipients are widely distributed throughout the state. Procedures are regionalized on a select few metropolitan centers. The total number of procedures grew 2.5% over the entire 10-year-period. High-volume hospital caseload increased 50%, from 7253 procedures in 2005 to 10,915 procedures in 2014. The number of procedures at medium and low-volume hospitals decreased 30% and 13%, respectively. CONCLUSIONS Despite any concerted effort aimed at moving orthopedic patients to high-volume hospitals, migration to high-volume centers occurred. Public interest in quality outcomes and cost, as well as financial incentives among medical centers to increase market share, potentially influence the migration of patients to high-volume centers. Further regionalization has the potential to exacerbate the current level of disparities among patient populations at low and high-volume hospitals. LEVEL OF EVIDENCE 3.
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Bronson WH, Lindsay D, Lajam C, Iorio R, Caplan A, Bosco J. Ethics of Provider Risk Factor Modification in Total Joint Arthroplasty. J Bone Joint Surg Am 2015; 97:1635-9. [PMID: 26446971 DOI: 10.2106/jbjs.o.00564] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Wesley H Bronson
- NYU Hospital for Joint Diseases, 301 East 17th Street, Suite 1402, New York, NY 10003. E-mail address for J. Bosco:
| | - David Lindsay
- NYU Hospital for Joint Diseases, 301 East 17th Street, Suite 1402, New York, NY 10003. E-mail address for J. Bosco:
| | - Claudette Lajam
- NYU Hospital for Joint Diseases, 301 East 17th Street, Suite 1402, New York, NY 10003. E-mail address for J. Bosco:
| | - Richard Iorio
- NYU Hospital for Joint Diseases, 301 East 17th Street, Suite 1402, New York, NY 10003. E-mail address for J. Bosco:
| | - Arthur Caplan
- NYU Hospital for Joint Diseases, 301 East 17th Street, Suite 1402, New York, NY 10003. E-mail address for J. Bosco:
| | - Joseph Bosco
- NYU Hospital for Joint Diseases, 301 East 17th Street, Suite 1402, New York, NY 10003. E-mail address for J. Bosco:
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Paul JC, Lonner BS, Goz V, Weinreb J, Karia R, Toombs CS, Errico TJ. Complication rates are reduced for revision adult spine deformity surgery among high-volume hospitals and surgeons. Spine J 2015; 15:1963-72. [PMID: 25937293 DOI: 10.1016/j.spinee.2015.04.028] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 02/02/2015] [Accepted: 04/15/2015] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Revision adult spinal deformity surgery (RASDS) is a particularly high-risk intervention. PURPOSE The aim was to assess complication rates in RASDS by surgeon and hospital operative volume. STUDY DESIGN/SETTING This was a retrospective analysis of prospectively collected data. PATIENT SAMPLE Based on a Nationwide Inpatient Sample (NIS) database (2001-2010), patients aged older than 21 years (International Classification of Diseases, Ninth Revision, Clinical Modification) with spine arthrodesis for scoliosis were included. For longitudinal analysis, the 2008-2011 New York State Inpatient Database (NY SID) was queried. OUTCOME MEASURES The outcome measures included complication rate after RASDS. METHODS Cases were identified as primary or revision surgery with or without osteotomy performed. Annual surgeon and hospital volumes were stratified into quartiles via identifier codes. Case complexity was determined using a novel operative complexity index, based on available NIS operative parameters: levels fused, approach, osteotomy, and revision status. The primary end point was morbidity during the hospital stay. New York State Inpatient Database analysis allowed for identification of rate of reoperation for infection or pseudarthrosis/implant failure. One-way analysis of variance was used to assess continuous measures, chi-square for categorical measures. RESULTS Of 139,150 adult spinal deformity surgery (ASDS) cases, 4,888 revision with hospital identifiers and 1,978 with surgeon identifiers were identified. Higher-volume surgeons performed more revision cases and cases requiring osteotomy. With increasing hospital volume, complication rate for RASDS decreased (9.7% vs. 12.9% at highest- vs. lowest-volume centers, p< .001). The highest-volume surgeons showed significant decreases in the rate of major complications for RASDS (8.8% vs. 10.7% for lowest-volume surgeons, p< .001). A similar trend was observed for ASDS cases requiring osteotomy. Multiple logistic regression analysis showed that the highest-volume hospitals and surgeons showed a reduced odds ratio for all complications compared with lowest-volume hospitals. For the NY SID, 528 RASDS cases indicated reoperation rates for infection and pseudarthrosis/implant failure after RASDS were increased for the lowest-volume hospitals and surgeons. CONCLUSIONS Perioperative complication rate associated with RASDS is lower when patients are treated by high-volume surgeons at high-volume centers. As complex cases requiring osteotomy and combined approaches are more frequent at high-volume centers, an operative complexity index helps predict the likelihood of volume-dependent complication rates. Future interhospital and intersurgeon comparisons should account for these case characteristics so that similar case complexity is compared in these analyses.
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Affiliation(s)
- Justin C Paul
- NYU Hospital for Joint Diseases 301 E 17th St, New York, NY 10003, USA
| | - Baron S Lonner
- Mount Sinai Medical Center Beth Israel Hospital, 10 Nathan D Perlman Pl, New York, NY 10003, USA.
| | - Vadim Goz
- NYU Hospital for Joint Diseases 301 E 17th St, New York, NY 10003, USA
| | - Jeffery Weinreb
- NYU Hospital for Joint Diseases 301 E 17th St, New York, NY 10003, USA
| | - Raj Karia
- NYU Hospital for Joint Diseases 301 E 17th St, New York, NY 10003, USA
| | - Courtney S Toombs
- NYU Hospital for Joint Diseases 301 E 17th St, New York, NY 10003, USA
| | - Thomas J Errico
- NYU Hospital for Joint Diseases 301 E 17th St, New York, NY 10003, USA
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Almond PS. Children's Surgical Centers Physician Training and Experience or Institutional Requirements: What does the data say? J Pediatr Surg 2015; 50:1431-4. [PMID: 26148441 DOI: 10.1016/j.jpedsurg.2015.05.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2015] [Accepted: 05/26/2015] [Indexed: 10/23/2022]
Affiliation(s)
- P Stephen Almond
- Chief of Surgery and Head, Divisions of Pediatric Surgery, Urology, and Transplantation, Driscoll Children's Hospital, 3533 South Alameda Street, Suite 302, Corpus Christi, Texas, 78411.
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The association between insurance status and complications, length of stay, and costs for pediatric idiopathic scoliosis. Spine (Phila Pa 1976) 2015; 40:247-56. [PMID: 25494309 DOI: 10.1097/brs.0000000000000729] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN Observational cross-sectional population study using national sample of pediatric hospital discharges from 2000 to 2009. OBJECTIVE To determine whether there is an association between insurance status and in-hospital surgical outcome for pediatric patients with idiopathic scoliosis. SUMMARY OF BACKGROUND DATA Association between health insurance status and in-hospital surgical outcome after spinal fusion for pediatric idiopathic scoliosis is unknown. METHODS An analysis of the Healthcare Cost and Utilization Project Kids' Inpatient Database 2000, 2003, 2006, and 2009 was performed. Patients aged 0 to younger than 18 years with idiopathic scoliosis and no underlying neurological disorders who underwent fusion were included. National trends, patient, hospital and surgical characteristics, postoperative in-hospital complications, and associated factors were studied. Univariate analysis and multivariable logistic regressions were used. RESULTS An estimated 19,439 surgical procedures (Medicaid 4766 vs. private 14,673) were performed for pediatric idiopathic scoliosis from 2000 to 2009 in the United States. Spinal fusions for pediatric idiopathic scoliosis steadily increased from 2000 to 2009 by 18.0%. Patients with private insurance were more likely to undergo surgery than patients with Medicaid insurance (7.7 vs. 5.9 per 100,000 capita; P = 0.003). Patients with private insurance were slightly older than patients with Medicaid insurance at the time of surgery (mean age = 13.9 yr vs. 13.4 yr; P < 0.001). Patients with Medicaid insurance had a higher prevalence of asthma (10.8% vs. 7.4%; P < 0.001), hypertension (1.4% vs. 0.4%; P < 0.001), hyperlipidemia (0.3% vs. 0.1%; P = 0.01), diabetes (0.8% vs. 0.3%; P < 0.001), and obesity (2.6% vs. 1.5%; P < 0.001). Patients with Medicaid insurance underwent more fusions involving 9 or more vertebrae than private patients (43.0% vs. 33.9%; P < 0.001). Postoperative in-hospital complications, including neurological (Medicaid 1.8% vs. private 1.7%; P = 0.64) and infectious (Medicaid 0.3% vs. private 0.2%; P = 0.44), were similar. Length of stay was longer (6.1 d vs. 5.6 d; P < 0.001) and hospital costs were higher ($45,443 vs. $41,635; P < 0.001) for patients with Medicaid insurance. Surgery performed in the South and Midwest regions, older age, and female sex were associated with lower rates of in-hospital neurological complications, whereas the presence of cardiac disease, obesity, and refusion were associated with higher rates of in-hospital neurological complications. CONCLUSION Patients with Medicaid insurance were younger, underwent longer fusions, and had more medical comorbidities than patients with private insurance. However, insurance status was not associated with an increased rate of postoperative in-hospital complications. LEVEL OF EVIDENCE 4.
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Optimal radiographical criteria after selective thoracic fusion for patients with adolescent idiopathic scoliosis with a C lumbar modifier: does adherence to current guidelines predict success? Spine (Phila Pa 1976) 2014; 39:E1368-73. [PMID: 25188601 DOI: 10.1097/brs.0000000000000580] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN Retrospective review of prospective data. OBJECTIVE To define optimal postoperative coronal parameters after selective thoracic fusions (STFs) and to test these parameters against recommended criteria for when to perform an STF. SUMMARY OF BACKGROUND DATA Previous studies have provided recommendations for when STF should be performed; however, clear parameters for target outcomes are lacking. METHODS Patients with Lenke 1C to 4C curves with adolescent idiopathic scoliosis from a multicenter database who underwent STF with minimum 2 years of follow-up were included. Postoperative parameters included lumbar Cobb angle, trunk shift, coronal balance, percent lumbar correction, and deformity-flexibility quotient. First, the upper 95% confidence interval for each parameter was calculated (queried data threshold) and set as the limit of "optimal" outcomes. Second, an independent surgeon survey was performed, and in patients with unanimous surgeon agreement of "success," the upper 95% confidence interval was determined (surgeon-derived threshold). Scoliosis Research Society-22 scores were compared between those above and below these 2 thresholds. Then, these outcomes were used to determine whether adherence to, or disregard for, previously published guidelines for STF were predictive of final outcome. RESULTS A total of 106 patients were analyzed. Target postoperative parameters as determined by the queried data and surgeon-derived thresholds were similar and rounded to: deformity-flexibility quotient less than 4, lumbar Cobb angle less than 26°, lumbar correction more than 37%, coronal balance 2 cm or less, and trunk shift less than 1.5 cm. Patients within target parameters had significantly better Scoliosis Research Society-22 satisfaction scores. Neither preoperative apical vertebral translation ratio more than 1.2 nor Cobb angle ratio more than 1.2 predicted 2-year success. Preoperative lumbar curve less than 45° and lumbar bend less than 25° were associated with increased likelihood of optimal outcomes. CONCLUSION Optimal postoperative outcomes for STF should include a lumbar Cobb angle less than 26°, coronal balance 2 cm or less, deformity-flexibility quotient less than 4, lumbar correction more than 37%, and trunk shift less than 1.5 cm. These findings suggest that performing an STF in patients with a preoperative lumbar Cobb angle less than 45° or a preoperative lumbar bend less than 25° will increase one's chances of success. LEVEL OF EVIDENCE 4.
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Abstract
STUDY DESIGN The Spine End Results Registry (2003-2004) is a registry of prospectively collected data of all patients undergoing spinal surgery at the University of Washington Medical Center and Harborview Medical Center. Insurance data were prospectively collected and used in multivariate analysis to determine risk of perioperative complications. OBJECTIVE Given the negative financial impact of surgical site infections (SSIs) and the higher overall complication rates of patients with a Medicaid payer status, we hypothesized that a Medicaid payer status would have a significantly higher SSI rate. SUMMARY OF BACKGROUND DATA The medical literature demonstrates lesser outcomes and increased complication rates in patients who have public insurance than those who have private insurance. No one has shown that patients with a Medicaid payer status compared with Medicare and privately insured patients have a significantly increased SSI rate for spine surgery. METHODS The prospectively collected Spine End Results Registry provided data for analysis. SSI was defined as treatment requiring operative debridement. Demographic, social, medical, and the surgical severity index risk factors were assessed against the exposure of payer status for the surgical procedure. RESULTS The population included Medicare (N = 354), Medicaid (N = 334), the Veterans' Administration (N = 39), private insurers (N = 603), and self-pay (N = 42). Those patients whose insurer was Medicaid had a 2.06 odds (95% confidence interval: 1.19-3.58, P = 0.01) of having a SSI compared with the privately insured. CONCLUSION The study highlights the increased cost of spine surgical procedures for patients with a Medicaid payer status with the passage of the Patient Protection and Affordable Care Act of 2010. The Patient Protection and Affordable Care Act of 2010 provisions could cause a reduction in reimbursement to the hospital for taking care of patients with Medicaid insurance due to their higher complication rates and higher costs. This very issue could inadvertently lead to access limitations. LEVEL OF EVIDENCE 3.
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The effect of surgeon and hospital volume on shoulder arthroplasty perioperative quality metrics. J Shoulder Elbow Surg 2014; 23:1187-94. [PMID: 24503522 DOI: 10.1016/j.jse.2013.11.017] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 10/25/2013] [Accepted: 11/06/2013] [Indexed: 02/01/2023]
Abstract
BACKGROUND There has been a significant increase in both the incidence of shoulder arthroplasty and the number of surgeons performing these procedures. Literature regarding the relationship between surgeon or hospital volume and the performance of modern shoulder arthroplasty is limited. This study examines the effect of surgeon or hospital shoulder arthroplasty volume on perioperative metrics related to shoulder hemiarthroplasty, total shoulder arthroplasty, and reverse shoulder arthroplasty. Blood loss, length of stay, and operative time were the main endpoints analyzed. METHODS Prospective data were analyzed from a multicenter shoulder arthroplasty registry; 1176 primary shoulder arthroplasty cases were analyzed. Correlation and analysis of covariance were used to examine the association between surgeon and hospital volume and perioperative metrics adjusting for age, sex, and body mass index. RESULTS Surgeon volume is inversely correlated with length of stay for hemiarthroplasty and total shoulder arthroplasty and with blood loss and operative time for all 3 procedures. Hospital volume is inversely correlated with length of stay for hemiarthroplasty, with blood loss for total and reverse shoulder arthroplasty, and with operative time for all 3 procedures. High-volume surgeons performed shoulder arthroplasty 30 to 50 minutes faster than low-volume surgeons did. CONCLUSIONS Higher surgeon and hospital case volumes led to improved perioperative metrics with all shoulder arthroplasty procedures, including reverse total shoulder arthroplasty, which has not been previously described in the literature. Surgeon volume had a larger effect on metrics than hospital volume did. This study supports the concept that complex shoulder procedures are, on average, performed more efficiently by higher volume surgeons in higher volume centers.
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Spine surgeon specialty is not a risk factor for 30-day complication rates in single-level lumbar fusion: a propensity score-matched study of 2528 patients. Spine (Phila Pa 1976) 2014; 39:E919-27. [PMID: 24827522 DOI: 10.1097/brs.0000000000000394] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN Multicenter retrospective cohort study. OBJECTIVE To investigate the impact of spine surgeon specialty on 30-day complication rates in patients undergoing single-level lumbar fusion. SUMMARY OF BACKGROUND DATA Operative care of the spine is delivered by surgeons who undergo either orthopedic or neurosurgical training. It is currently unknown whether surgeon specialty has an impact on 30-day complication rates in patients undergoing single-level lumbar fusion. METHODS The American College of Surgeons National Surgical Quality Improvement Program database was retrospectively reviewed to identify all patients who underwent single-level lumbar fusion procedures during 2006-2011. Propensity score matching analysis was employed to reduce baseline differences in patient characteristics. Univariate and multivariate analyses were performed to assess the impact of spine surgeon specialty on 30-day complication rates. RESULTS A total of 2970 patients were included for analysis. After propensity matching, 1264 pairs of well-matched patients remained in the cohort. Overall complication rates in the unadjusted data set were 7.3% and 7.1% for the neurosurgery and orthopedic surgery cohort, respectively. Our multivariate analysis revealed that compared with the neurosurgery cohort, the orthopedic surgery cohort did not have statistically significant differences in odds ratios (OR) for development of any complication (OR, 0.95; 95% confidence interval [CI], 0.69-1.30; P = 0.740). Similarly, spine surgeon specialty was not a risk factor in any of the specific complications studied, including medical complications (OR, 1.11; 95% CI, 0.77-1.60; P = 0.583), surgical complications (OR, 0.76; 95% CI, 0.46-1.26; P = 0.287), or reoperation (OR, 1.10; 95% CI, 0.76-1.60; P = 0.618). CONCLUSION Our analysis demonstrates that spine surgeon specialty is not a risk factor for any of the reported 30-day complications in patients undergoing single-level lumbar fusion. These data support the currently dichotomous paradigm of training for spine surgeons. Further research is warranted to validate this relationship in other spine procedures and for other outcomes. LEVEL OF EVIDENCE 4.
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Vogel LA, Moen TC, Macaulay AA, Arons RR, Cadet ER, Ahmad CS, Levine WN. Superior labrum anterior-to-posterior repair incidence: a longitudinal investigation of community and academic databases. J Shoulder Elbow Surg 2014; 23:e119-26. [PMID: 24496049 DOI: 10.1016/j.jse.2013.11.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Revised: 10/11/2013] [Accepted: 11/06/2013] [Indexed: 02/01/2023]
Abstract
BACKGROUND Superior labrum anterior-to-posterior (SLAP) lesion repair is controversial regarding indications and potential complications. METHODS Databases were used to determine the SLAP repair incidence compared with all orthopaedic procedures over a period of 10 years. In part A, the New York Statewide Planning and Research Cooperative System ambulatory surgery database was investigated from 2002 to 2009. In part B, the California Office of Statewide Health Planning and Development ambulatory surgery database was investigated from 2005 to 2009. In part C, the American Board of Orthopaedic Surgery (ABOS) database was investigated from 2003 to 2010. RESULTS In part A, from 2002 to 2009, there was a 238% increase in SLAP repair volume compared with a 125% increase in all orthopaedic procedures. In part B, from 2005 to 2009, there was a 20.17% increase in SLAP repair volume compared with a decrease of 13.64% in all orthopaedic procedures. In part C, among candidates performing at least 1 SLAP repair, there was no statistically significant difference in likelihood of performing a SLAP repair (95% confidence interval, 0.973-1.003) in 2010 as compared with 2003 (P > .10). CONCLUSIONS There has been a significant increase in the incidence of SLAP repairs in the past 10 years in statewide databases. This pattern was not seen in the ABOS database, in which the annual volume of SLAP repairs remained stable over the same period. This suggests that SLAP lesions have been over-treated with surgical repair but that part II ABOS candidates are becoming more aware of the need to narrow indications. LEVEL OF EVIDENCE Epidemiology study, database analysis.
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Affiliation(s)
- Laura A Vogel
- Department of Orthopaedic Surgery, New York Presbyterian/Columbia University Medical Center, New York, NY, USA
| | - Todd C Moen
- W.B. Carrell Memorial Clinic, Dallas, TX, USA
| | - Alec A Macaulay
- Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Raymond R Arons
- Department of Orthopaedic Surgery, New York Presbyterian/Columbia University Medical Center, New York, NY, USA
| | - Edwin R Cadet
- Department of Orthopaedic Surgery, New York Presbyterian/Columbia University Medical Center, New York, NY, USA
| | - Christopher S Ahmad
- Department of Orthopaedic Surgery, New York Presbyterian/Columbia University Medical Center, New York, NY, USA
| | - William N Levine
- Department of Orthopaedic Surgery, New York Presbyterian/Columbia University Medical Center, New York, NY, USA.
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Jernigan SC, Berry JG, Graham DA, Goumnerova L. The comparative effectiveness of ventricular shunt placement versus endoscopic third ventriculostomy for initial treatment of hydrocephalus in infants. J Neurosurg Pediatr 2014; 13:295-300. [PMID: 24404970 DOI: 10.3171/2013.11.peds13138] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECT The purpose of this study was to compare the effectiveness of CSF diversion with endoscopic third ventriculostomy (ETV) versus shunt therapy in infants with hydrocephalus. METHODS The authors conducted a retrospective analysis of 5416 infants 1 year of age or younger with hydrocephalus (congenital or acquired) in whom CSF diversion was performed using either ETV or shunt placement at 41 children's hospitals between 2004 and 2009. Data were obtained from the Pediatric Health Information Systems database. Surgical failure was defined as the need for a repeat diversion operation within 1 year of initial surgery. The authors compared failure rates of ETV and shunt, as well as patient demographics and clinical characteristics, using hierarchical regression according to treatment group. RESULTS During the period examined, 872 infants (16.1%) initially underwent ETV and 4544 (83.9%) underwent ventricular shunt placement. The median infant age was 37 days (IQR 11-122 days) for both ETV and shunt placement. More infants who underwent ETV rather than shunt placement were born prematurely (41.6% vs 23.9%, respectively; p < 0.01) and had intraventricular hemorrhage (45.4% vs 17.5%, respectively; p < 0.01). Higher operative failure rates at 1 year were observed in infants who underwent ETV as opposed to shunt surgery (64.5% vs 39.6%, respectively; OR 2.9 [95% CI 2.3-3.5], p < 0.01). After controlling for prematurity, intraventricular hemorrhage, and spina bifida, ETV remained associated with a higher risk of failure (OR 2.6 [95% CI 2.1-3.2]). CONCLUSIONS In infants with hydrocephalus, a greater 1-year CSF diversion failure rate may occur after ETV compared with shunt placement. This risk is most significant for procedures performed within the first 90 days of life. Further investigation of the need for multiple reoperations, cost, and impact of surgeon and hospital experience is necessary to distinguish which treatment is more effective in the long term.
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Abstract
STUDY DESIGN Multivariate analysis of prospectively collected registry data. OBJECTIVE To determine the effect of payor status on complication rates after spine surgery. SUMMARY OF BACKGROUND DATA Understanding the risk of perioperative complications is an essential aspect in improving patient outcomes. Previous studies have looked at complication rates after spine surgery and factors related to increased perioperative complications. In other areas of medicine, there has been a growing body of evidence gathered to evaluate the role of payor status on outcomes and complications. Several studies have found increased complication rates and inferior outcomes in the uninsured and Medicaid insured. METHODS The Spine End Results Registry (2003-2004) is a collection of prospectively collected data on all patients who underwent spine surgery at our 2 institutions. Extensive demographic data, including payor status, and medical information were prospectively recorded as described previously by Mirza et al. Medical complications were defined in detail a priori and were prospectively recorded for at least 2 years after surgery. Using univariate and multivariate analysis, we determined risk of postoperative medical complications dependent on payor status. RESULTS A total of 1591 patients underwent spine surgery in 2003 and 2004 that met our criteria and were included in our analysis. With the multivariate analysis and by controlling for age, patients whose insurer was Medicaid had a 1.68 odds ratio (95% confidence interval: 1.23-2.29; P = 0.001) of having any adverse event when compared with the privately insured. CONCLUSION After univariate and multivariate analyses, Medicaid insurance status was found to be a risk factor for postoperative complications. This corresponds to an ever-growing body of medical literature that has shown similar trends and raises the concern of underinsurance.
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Acosta CD, Knight M, Lee HC, Kurinczuk JJ, Gould JB, Lyndon A. The continuum of maternal sepsis severity: incidence and risk factors in a population-based cohort study. PLoS One 2013; 8:e67175. [PMID: 23843991 PMCID: PMC3699572 DOI: 10.1371/journal.pone.0067175] [Citation(s) in RCA: 133] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Accepted: 05/14/2013] [Indexed: 01/17/2023] Open
Abstract
OBJECTIVE To investigate the incidence and risk factors associated with uncomplicated maternal sepsis and progression to severe sepsis in a large population-based birth cohort. METHODS This retrospective cohort study used linked hospital discharge and vital statistics records data for 1,622,474 live births in California during 2005-2007. Demographic and clinical factors were adjusted using multivariable logistic regression with robust standard errors. RESULTS 1598 mothers developed sepsis; incidence of all sepsis was 10 per 10,000 live births (95% CI = 9.4-10.3). Women had significantly increased adjusted odds (aOR) of developing sepsis if they were older (25-34 years: aOR = 1.29; ≥35 years: aOR = 1.41), had ≤high-school education (aOR = 1.63), public/no-insurance (aOR = 1.22) or a cesarean section (primary: aOR = 1.99; repeat: aOR = 1.25). 791 women progressed to severe sepsis; incidence of severe sepsis was 4.9 per 10,000 live births (95% CI = 4.5-5.2). Women had significantly increased adjusted odds of progressing to severe sepsis if they were Black (aOR = 2.09), Asian (aOR = 1.59), Hispanic (aOR = 1.42), had public/no-insurance (aOR = 1.52), delivered in hospitals with <1,000 births/year (aOR = 1.93), were primiparous (aOR = 2.03), had a multiple birth (aOR = 3.5), diabetes (aOR = 1.47), or chronic hypertension (aOR = 8.51). Preeclampsia and postpartum hemorrhage were also significantly associated with progression to severe sepsis (aOR = 3.72; aOR = 4.18). For every cumulative factor, risk of uncomplicated sepsis increased by 25% (95% CI = 17.4-32.3) and risk of progression to severe sepsis/septic shock increased by 57% (95% CI = 40.8-74.4). CONCLUSIONS The rate of severe sepsis was approximately twice the 1991-2003 national estimate. Risk factors identified are relevant to obstetric practice given their cumulative risk effect and the apparent increase in severe sepsis incidence.
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Affiliation(s)
- Colleen D Acosta
- National Perinatal Epidemiology Unit, University of Oxford, Oxford, United Kingdom.
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Abstract
STUDY DESIGN Retrospective case series. OBJECTIVE The objective of this study was to share our experience in the surgical treatment of adolescent idiopathic scoliosis (AIS), specifically the rate of revision surgeries and their indications. SUMMARY OF BACKGROUND DATA Minimizing AIS surgical morbidity includes prevention of short- and long-term complications that could require an unanticipated revision. There have been an increasing number of reports about revision rates and their causes in AIS. This study summarizes the experience of a large patient population treated by a single surgeon in a single institution. METHODS All patients who underwent surgical treatment for AIS between 10 and 20 years of age during 1983 to 2005 were reviewed. All revision surgeries performed during the same period were searched. The indications for revision and type of procedure performed were recorded. RESULTS A total of 502 patients with AIS underwent spinal fusion with instrumentation at an average age of 14.3 years at initial surgery. In 485 patients, the surgery consisted of posterior-only spinal fusion. A total of 24 revision surgeries were performed for 23 patients (4.9%; cumulative probability of revision = 8%). The primary indications for revision were residual rib deformity (n = 8), instrumentation dislodgement (n = 4), compensatory curve progression (n = 3), junctional kyphosis (n = 3), and symptomatic implants (n = 3). One patient had a late infection. There was 1 case of pseudoarthrosis. One patient requested scar revision. There were no cases of neurological deficit. CONCLUSION In this single-surgeon series, revision after the index spinal fusion was required for a relatively low proportion of patients. The main indications for revision were residual rib deformity, hook dislodgment, and progression of the unfused compensatory curve.
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Axt JR, Murphy AJ, Arbogast PG, Lovvorn HN. Volume-outcome effects for children undergoing resection of renal malignancies. J Surg Res 2012; 177:e27-33. [PMID: 22541281 DOI: 10.1016/j.jss.2012.03.065] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2012] [Revised: 03/17/2012] [Accepted: 03/28/2012] [Indexed: 11/16/2022]
Abstract
INTRODUCTION Adults undergoing oncologic resections at low-volume centers experience increased perioperative morbidity and mortality. The volume-outcome effect has not been extensively studied in pediatric oncologic resections. METHODS To clarify volume-outcome effects in pediatric oncologic resections, we analyzed resection of renal malignancies in children less than 15 y of age. We conducted a cross-sectional analysis of hospital discharges included in the health care utilization project kids' inpatient database from 1997 to 2009, examining in-hospital operative complications, length of stay (LOS), and inflation-adjusted hospital charges. Hospital volume was expressed as low (n = 1-2), medium (n = 3-4), and high (n > 4) annual volume of resections. RESULTS One thousand five hundred thirty-eight patients underwent renal malignancy resection. Of these, 527 patients had resection in low-, 422 in medium-, and 589 in high-volume hospitals. Relative to low-volume hospitals, those resected in medium-volume hospitals had an odds ratio of 0.62 (95% confidence interval 0.39-0.99, P = 0.046) for operative complication and those in high-volume hospitals had an odds ratio of 1.02 (95% confidence interval 0.63-1.65, P = 0.95). There was no detectable association with LOS (P = 0.113) or inflation-adjusted charges (P = 0.331). CONCLUSIONS The number of complications, total charges, and LOS attributable to resection of a childhood renal malignancy did not differ among high-, medium-, or low-operative volume hospitals, although oncologic outcomes could not be determined because of the limited nature of this administrative database.
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Affiliation(s)
- Jason R Axt
- Department of Pediatric Surgery, Monroe Carell Jr. Children's Hospital at Vanderbilt, Nashville, Tennessee 37232-9780, USA.
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Gutierrez JC, Cheung MC, Zhuge Y, Koniaris LG, Sola JE. Does Children's Oncology Group hospital membership improve survival for patients with neuroblastoma or Wilms tumor? Pediatr Blood Cancer 2010; 55:621-8. [PMID: 20806361 DOI: 10.1002/pbc.22631] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
PURPOSE To determine prognostic significance of hospital surgical volume and Children's Oncology Group (COG) membership on neuroblastoma (NBL) and Wilms tumor (WT) survival. METHODS The Florida Cancer Data System was queried from 1981 to 2004. RESULTS Of 869 NBL patients, 463 were treated at COG/HVC, 246 at COG/LVC, and 160 at non-COG/LVC. COG hospitals treated a larger proportion of patients <1 year of age (P = 0.002) and relatively more patients with adrenal and mediastinal tumors (P = 0.005). COG centers more frequently administered chemotherapy (72% vs. 51%, P < 0.001). Five- and 10-year survival rates were higher at COG/HVC (70.6%, 67.7%) and COG/LVC (75.8%, 72.6%) than non-COG/LVC (59.5%, 54.4%, P < 0.05). Of 790 WT patients, 395 were treated at COG/HVC, 210 at COG/LVC, and 185 at non-COG/LVC. COG hospitals treated younger patients and lower staged tumors (P < 0.05). COG centers more frequently administered chemotherapy (88% vs. 59%, P < 0.001). Five- and 10-year survival rates were higher at COG/HVC (91.3%, 89.9%) and COG/LVC (96.7%, 94.7%) than non-COG/LVC (82.4%, 81.7%, P < 0.05). Multivariate analysis demonstrated WT patients treated at non-COG hospitals, but not NBL patients, had worse survival (HR 3.107, P = 0.01). CONCLUSION Children treated at COG hospitals had higher overall use of chemotherapy. This translated into a significantly improved survival benefit for WT.
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Affiliation(s)
- Juan C Gutierrez
- Division of Pediatric Surgery and Surgical Oncology, DeWitt Daughtry Family Department of Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
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Vitale MA, Arons RR, Hurwitz S, Ahmad CS, Levine WN. The rising incidence of acromioplasty. J Bone Joint Surg Am 2010; 92:1842-50. [PMID: 20686058 DOI: 10.2106/jbjs.i.01003] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Acromioplasty is considered a technically simple procedure but has become controversial with regard to its indications and therapeutic value. METHODS Two complementary databases were used to ascertain the frequency of acromioplasty over a recent span of time. In Part A, the New York Statewide Planning and Research Cooperative System (SPARCS) ambulatory surgery database was searched from 1996 to 2006 to identify all ambulatory surgery acromioplasties as well as all orthopaedic ambulatory surgery procedures. In Part B, the American Board of Orthopaedic Surgery (ABOS) database was searched from 1999 to 2008 to identify all arthroscopic acromioplasties as well as all orthopaedic procedures. RESULTS Part A revealed that in 1996 there were 5571 acromioplasties in New York State, representing a population incidence of 30.0 per 100,000. In 2006 there were 19,743 acromioplasties, representing a population incidence of 101.9 per 100,000. Over these eleven years, the volume of acromioplasties increased by 254.4%, compared with only a 78.3% increase in the volume of all orthopaedic ambulatory surgery procedures. In 2006, as compared with 1996, patients were 2.4 times more likely to have an acromioplasty compared with all other orthopaedic ambulatory procedures (p < 0.0001). Part B revealed that, in 1999, a mean of 2.6 arthroscopic acromioplasties were reported per candidate for Board certification. In 2008 a mean of 6.3 arthroscopic acromioplasties per candidate were reported. Over these ten years, the mean number of arthroscopic acromioplasties reported increased by 142.3%, compared with only a 13.0% increase in the mean number of all orthopaedic surgery procedures. In 2008, as compared with 1999, candidates were 2.2 times more likely to report an arthroscopic acromioplasty compared with all other orthopaedic procedures (p < 0.0001). CONCLUSIONS There has been a substantial increase in the overall volume and the population-based incidence of acromioplasties in recent years on both the state and national levels in the United States. The reasons for this increase have yet to be determined and are likely multifactorial, with patient-based, surgeon-based, and systems-based factors all playing a role.
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Affiliation(s)
- Mark A Vitale
- Center for Shoulder, Elbow and Sports Medicine, Department of Orthopaedic Surgery, New York-Presbyterian Medical Center, Columbia University, 622 West 168th Street, PH-1117, New York, NY 10032, USA.
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Kamerlink JR, Quirno M, Auerbach JD, Milby AH, Windsor L, Dean L, Dryer JW, Errico TJ, Lonner BS. Hospital cost analysis of adolescent idiopathic scoliosis correction surgery in 125 consecutive cases. J Bone Joint Surg Am 2010; 92:1097-104. [PMID: 20439654 DOI: 10.2106/jbjs.i.00879] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Although achieving clinical success is the main goal in the surgical treatment of adolescent idiopathic scoliosis, it is becoming increasingly important to do so in a cost-effective manner. The goal of the present study was to determine the surgical and hospitalization costs, charges, and reimbursements for adolescent idiopathic scoliosis correction surgery at one institution. METHODS We performed a retrospective review of 16,536 individual costs and charges, including overall reimbursements, for 125 consecutive patients who were managed surgically for the treatment of adolescent idiopathic scoliosis by three different surgeons between 2006 and 2007. Demographic, surgical, and radiographic data were recorded for each patient. Stepwise multiple linear regression analysis was employed to assess independent correlation with total cost and charge. Nonparametric descriptive statistics were calculated for total cost with use of the Lenke curve-classification system. RESULTS The mean age of the patients was 15.2 years. The mean main thoracic curve measured 50 degrees, and the thoracolumbar curve measured 41 degrees. The cost varied with Lenke curve type: $29,955 for type 1, $31,414 for type 2, $31,975 for type 3, $60,754 for type 4, $32,652 for type 5, and $33,416 for type 6. Independently significant increases for total cost were found in association with the number of pedicle screws placed, the total number of vertebral levels fused, and the type of surgical approach (R(2) = 0.35, p <or= 0.03). Independently significant increases for reimbursement were found in association with the number of pedicle screws placed and the type of surgical approach (R(2) = 0.12, p <or= 0.02). The hospital was reimbursed 53% of total charges and 120% of total costs. Reimbursement was highly correlated with charge (r = 0.45, p < 0.001). For rehospitalizations, the hospital was reimbursed 65% of charges and 93% of costs. CONCLUSIONS The largest contributors to overall cost were implants (29%), intensive care unit and inpatient room costs (22%), operating room time (9.9%), and bone grafts (6%). There were three significant independent predictors of increased total cost: the surgical approach used, the number of pedicle screws placed, and the number of vertebral levels fused. This study characterizes the relative contributions of factors that contribute to total costs, charges, and reimbursements that can, in time, identify potential areas for cost reduction or redistribution of resources in the surgical treatment of adolescent idiopathic scoliosis.
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Affiliation(s)
- Jonathan R Kamerlink
- Department of Orthopaedic Surgery, NYU Hospital for Joint Diseases, NYU Medical Center, New York, NY 10017, USA
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Joint Replacement Rehabilitation Outcomes on Discharge From Skilled Nursing Facilities and Inpatient Rehabilitation Facilities. Arch Phys Med Rehabil 2009; 90:1284-96. [DOI: 10.1016/j.apmr.2009.02.009] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2008] [Revised: 01/15/2009] [Accepted: 02/15/2009] [Indexed: 11/17/2022]
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Grushka JR, Laberge JM, Puligandla P, Skarsgard ED. Effect of hospital case volume on outcome in congenital diaphragmatic hernia: the experience of the Canadian Pediatric Surgery Network. J Pediatr Surg 2009; 44:873-6. [PMID: 19433160 DOI: 10.1016/j.jpedsurg.2009.01.023] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2009] [Accepted: 01/15/2009] [Indexed: 10/20/2022]
Abstract
PURPOSE Despite advances in neonatal care of congenital diaphragmatic hernia (CDH), a significant variation exists in the mortality rates reported by individual centers. Center experience (reflected by case volume) may contribute to this variation in outcome. The aim of the study was to determine whether CDH mortality is affected by hospital case volume. METHODS The CDH cases were abstracted from a disease-specific, 16-hospital, national network. Thirteen hospitals participated in this study. Anonymized hospitals were categorized as either high (>6 cases) or low-volume (<or=6 cases) centers (HVC, n = 6; LVC, n = 7) according to the median case number per center. Risk-adjusted (Score for Neonatal Acute Physiology, version II [SNAP-II] score) mortality rates were compared between HVC and LVC. RESULTS One hundred twenty-one CDH cases were identified. Overall in-hospital survival was 81%. No significant difference in SNAP-II score was observed between HVC and LVC. Of 97 (15%) infants treated in 6 HVC, 15 (15%) died compared to 8 (33%) of 24 in 7 LVC (P < .05). CONCLUSION Hospital case volume may be partially responsible for mortality rate variation in CDH. This result requires careful analysis, as case volume may merely be a surrogate for other predictive variables.
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Affiliation(s)
- Jeremy R Grushka
- Division of Pediatric Surgery, The Montreal Children's Hospital, Montreal, Quebec, Canada
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Abstract
STUDY DESIGN Retrospective cohort study of consecutive patients undergoing primary fusion with segmental fixation for adult spinal deformity. OBJECTIVE We sought to determine the survivorship of primary fusion for adult spinal deformity and identify patient-specific predictors of complications requiring reoperation. SUMMARY OF BACKGROUND DATA Compared with the adolescent population, surgery for adult deformity is often more complex and technically difficult, contributing to a high reported rate of complications that can result in the need for reoperation. Reported complication rates vary widely. METHODS From 1999-2004 all patients who underwent primary instrumented fusion for nonparalytic adult spinal deformity at a single center were included. Inclusion criteria included minimum age at surgery of 20 years and minimum fusion length of 4 motion segments. Surgical, demographic, and comorbidity data were recorded. Reoperation was defined as any additional surgery involving levels of the spine operated on during the index procedure and/or adjacent levels. Comparisons were performed between patients who required reoperation and those who did not. RESULTS Eighty-nine patients met inclusion criteria. Endpoint (minimum 2 years follow-up or reoperation) was reached for 91%. Mean follow-up was 3.8 years. Cumulative reoperation rate was 25.8%. Survival was 86.4% at 1 year, 77.2% at 2 years, and 75.2% at 3 years. Reasons for reoperation included infection (n = 8), pseudarthrosis (n = 3), adjacent segment problems (n = 5), implant failure (n = 4), and removal of painful implants (n = 3). Multivariate analysis showed smoking was significantly higher in the reoperation group. CONCLUSION Using a strict definition of reoperation for a well-defined cohort, in the presence of relevant risk factors, many patients undergoing primary fusion for adult spinal deformity required reoperation. The results indicate that complex medical and surgical factors contribute to the treatment challenges posed by patients with adult spinal deformity. This represents the largest cohort reported to date of patients undergoing primary fusion using third-generation instrumentation techniques.
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Abstract
BACKGROUND Current data on the association between surgeon and hospital volumes and patient outcomes after hip fracture surgery is inconclusive. We hypothesized that surgeons and hospitals with higher caseloads of hip fracture care have better outcomes as measured by decreased postoperative complications and mortality, shorter length of stay in the hospital, routine disposition of patients on discharge, and decreased cost of care. METHODS This is a retrospective cohort study using the Nationwide Inpatient Sample database. Data were extracted on 97,894 patients surgically treated for a hip fracture for the years 1988 through 2002. Multiple linear regression models were used to estimate the adjusted association between surgeon and hospital volume and outcomes for femoral neck and pertrochanteric hip fracture care. RESULTS The in-hospital mortality rate for those patients who had hip fracture fixation by a low-volume surgeon (<7 procedures/yr) was significantly higher than for those whose procedure was performed by a high-volume surgeon (>15 cases/yr) (p = 0.005). The incidence of transfusion, pneumonia, and decubitus ulcer were also higher in those patients managed by a low-volume surgeon (p = <0.05). Conversely, hospital volume was not associated with significant differences in mortality although low-volume hospitals (<57 cases/yr) were associated with higher rates of postoperative infection, pneumonia, transfusion, and nonroutine discharge (p = <0.05). Both low-volume hospitals and surgeons were associated with longer lengths of stay (p = <0.05). CONCLUSIONS This study provides evidence that surgeon volume, but not hospital volume, is associated with decreased mortality in the treatment of hip fractures. Both surgeon and hospital volume seem to be associated with nonfatal morbidity and length of stay.
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Gutierrez JC, Koniaris LG, Cheung MC, Byrne MM, Fischer AC, Sola JE. Cancer care in the pediatric surgical patient: a paradigm to abolish volume-outcome disparities in surgery. Surgery 2008; 145:76-85. [PMID: 19081478 DOI: 10.1016/j.surg.2008.08.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2007] [Accepted: 08/01/2008] [Indexed: 11/29/2022]
Abstract
BACKGROUND The objective of this study was to define the prognostic significance of hospital surgical volume on outcomes for pediatric neuroblastoma and Wilms tumor. METHODS The Florida Cancer Data System was examined for all pediatric patients treated between 1981 and 2004. RESULTS Of the 869 patients with neuroblastoma identified, 463 were treated at 5 high-volume centers (HVC) and 406 were treated at 61 low-volume centers (LVC). There were no differences in sex, age at diagnosis, race, ethnicity, or stage of disease between the 2 groups. The 5- and 10-year survival rates were identical between treatment groups (70.6% and 67.7% at HVC vs 69.3% and 65.2% at LVC, P = .243). Multivariate analysis identified age at diagnosis and tumor stage as independent prognostic factors. Of the 790 patients with Wilms tumor identified, 395 were treated at 5 HVC and 395 were treated at 50 LVC. There were no differences in sex, age of diagnosis, or stage of disease between the 2 groups. The 5- and 10-year survival rates were identical between treatment groups (91.3% and 89.9% at HVC vs 89.7% and 88.5% at LVC, P = .698). Multivariate analysis identified ethnicity, tumor stage, and use of chemotherapy as independent prognostic factors. CONCLUSION Survival rates for patients with neuroblastoma and Wilms tumor are unrelated to the hospital surgical volume or patient race. This result stands in stark contrast to a variety of adult malignancies. Models used for pediatric patient care for cancer may provide insight into ways to improve the treatment of adult patients in need of complex cancer care.
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Affiliation(s)
- Juan C Gutierrez
- DeWitt Daughtry Family Department of Surgery, University of Miami Miller School of Medicine, Miami, FL, USA
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Abstract
The discipline of health services research, often loosely referred to as outcomes research, is primarily focused on the study of access to care, costs of care, and quality of care. Access to care includes everything that facilitates or impedes the actual use of medical services. Costs of care include financial and nonfinancial payments by insurers and individuals for medical services as well as the opportunity cost of lost wages and the societal cost of decreased productivity. Quality of care encompasses elements of the structure, process, and outcome of medical care.
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Affiliation(s)
- Mark S Litwin
- David Geffen School of Medicine, School of Public Health, Jonsson Comprehensive Cancer Center, University of California, Los Angeles. Los Angeles, CA 90095-1738, USA.
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Berry JG, Hall MA, Sharma V, Goumnerova L, Slonim AD, Shah SS. A multi-institutional, 5-year analysis of initial and multiple ventricular shunt revisions in children. Neurosurgery 2008; 62:445-53; discussion 453-4. [PMID: 18382323 DOI: 10.1227/01.neu.0000316012.20797.04] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE To evaluate risk factors and predictors of cerebrospinal ventricular shunt revisions in children. METHODS A retrospective, longitudinal cohort of 1307 children ages 0 to 18 years undergoing initial ventricular shunt placement in the year 2000, with follow-up through 2005, from 32 freestanding children's hospitals within the Pediatric Health Information Systems database was studied. Rates of ventricular shunt revision were compared with patient demographic, clinical, and hospital characteristics with use of bivariate and multivariate regression accounting for hospital clustering. RESULTS Thirty-seven percent of children required at least one shunt revision within 5 years of initial shunt placement; 20% of children required two or more revisions. Institutional rates of first shunt revision ranged from 20 to 70% of initial shunts placed among the 32 hospitals in the cohort. Hospitals where one to 20 initial shunt placements per year experienced the highest initial shunt revision rate (42%). Hospitals performing over 83 initial shunt placements per year experienced the lowest revision rate (22%). We found that children undergoing shunt placement in the Midwest were more likely to experience multiple shunt revisions (odds ratio, 1.25; 95% confidence interval, 1.06-1.47) after controlling for hospital volume, shunt type, age, and diagnosis associated with initial shunt placement. CONCLUSION Higher hospital volume of initial shunt placement was associated with lower revision rates. Substantial hospital variation in the rates of ventricular shunt revision exists among children's hospitals. Future prospective studies are needed to examine the reasons for the variability in shunt revision rates among hospitals, including differences in specific processes of care.
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Affiliation(s)
- Jay G Berry
- Department of Medicine, Complex Care Service, Children's Hospital Boston, Harvard Medical School, Boston, Massachusetts 02115, USA.
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Abstract
STUDY DESIGN We used the Climent Quality of Life for Spinal Deformities Scale prospectively in a nonrandomized prospective comparative cohort of operative versus observational management of adolescent idiopathic scoliosis. OBJECTIVE To compare the change in disease-specific quality of life associated with operating on adolescents with idiopathic scoliosis, to the change in disease-specific quality of life among observed scoliosis patients with a similar 2-year follow-up period. SUMMARY OF BACKGROUND DATA The immediate effect of scoliosis surgery on quality of life from a patient perspective has not been properly documented but should play a role in the patient's decision to operate. METHODS At a single tertiary referral children's hospital spinal clinic, 119 patients undergoing scoliosis surgery and 42 patients undergoing observation only for scoliosis were enrolled in a prospective study, including preoperative and postoperative spine-specific quality of life. Change in quality of life after 2 years of follow-up among operated versus observed patients (adjusted for baseline quality of life) was used to estimate the short-term benefit of scoliosis surgery. RESULTS The operated group experienced an increase in quality of life of 4.3 points (95% confidence interval, 0.69-7.88) on the 115-point Climent scale. Although statistically significant, this increase was lower than the 5.5-point cutoff we had defined a priori as clinically significant. CONCLUSION Scoliosis surgery results in a small increase in spine-related quality of life at 2 years. This increase is of questionable clinical significance. Decisions to operate on adolescents with scoliosis should acknowledge modest expectations about short-term gains in quality of life.
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Shah AD, Kohli N, Rajan SS, Hoyte L. Racial characteristics of women undergoing surgery for pelvic organ prolapse in the United States. Am J Obstet Gynecol 2007; 197:70.e1-8. [PMID: 17618763 DOI: 10.1016/j.ajog.2007.02.042] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2006] [Revised: 12/29/2006] [Accepted: 02/27/2007] [Indexed: 10/23/2022]
Abstract
OBJECTIVE This study was undertaken to compare the prevalence, demographics, and complications of pelvic organ prolapse surgery across races in the United States. STUDY DESIGN Data from the 2003 National Census and the 2003 National Hospital Discharge Survey were used to determine rates of prolapse surgery, demographic characteristics, morbidity, and mortality across races. RESULTS In 2003, 199,698 women underwent prolapse surgery. Rates of prolapse surgery per 10,000 women were 14.8, 5.6, and 8.7 in women of white, black, and other races. By geographic region, surgical rates per 10,000 white vs black women differed most in the West (16.0 vs 0.8). Of black women, 27% were on public assistance, compared with 5.9% and 9.6% women of white and other races. Complications occurred in 19.4%, 34.1%, and 27.4% of women of white, black, other races. Mortality was uncommon for all races. CONCLUSION Racial disparities between white and black women undergoing prolapse surgery appear to exist.
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Affiliation(s)
- Aparna D Shah
- Division of Urogynecology, Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
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