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Xu JJ, Tang XT, Fu WC, Zheng JX, Jiang LP, Zhou YW, Yang QN. "Adjacent Bed Effect" of Total Knee Arthroplasty Patients During the Perioperative Period. Pain Manag Nurs 2024; 25:88-92. [PMID: 37867077 DOI: 10.1016/j.pmn.2023.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 09/04/2023] [Accepted: 09/04/2023] [Indexed: 10/24/2023]
Abstract
BACKGROUND Knee osteoarthropathy is one of the most common degenerative joint diseases in the elderly, total knee arthroplasty (TKA) is the most commonly used treatment for end-stage knee osteoarthropathy. Negative emotions such as anxiety have been extensively documented in knee osteoarthropathy patients. AIM This study aimed to investigate the Emotional Contagion during hospitalization in patients undergoing TKA. METHODS Eligible subjects were divided into three case groups according to their anxiety states and bed arrangement. All subjects underwent a unilateral, cemented TKA under general anesthesia. Post-operative recovery outcomes including pain, pain behavior and physical function were recorded pre-operation, 1-day, 1 week, 2-weeks, 1-month and 3-months post-operation. RESULTS A total of 38 subjects were included in the final analysis. Subjects with anxiety had higher Visual Analogue Scale pain scores, PROMIS-Pain Behavior scores than subjects without anxiety in the Contagion Group preoperation (p ≤ .05). Non-anxiety subjects hospitalized in beds physically adjacent to anxiety subjects experienced more severe pain and poorer function (p ≤ .05). After discharge, all clinical outcomes gradually became lower than anxiety subjects in the Contagion Group, reaching levels similar to non-anxiety subjects in the No Contagion Group within 1 month (p>.05). CONCLUSIONS This study showed that patients with anxiety may have an "Adjacent Bed Effect" on patients with TKA in the adjacent bed, which may be associated with poorer postoperative recovery, including pain and physical function. We speculate this phenomenon can be effectively avoided by the nursing team through accurately assessing psychological status and reasonable bed arrangements in the inpatient assessment phase.
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Affiliation(s)
- Jia-Jing Xu
- From the Department of Joint Orthopaedic Surgery, Jinhua Municipal Central Hospital, Zhejiang University, Jinhua City, Zhejiang Province, China
| | | | - Wei-Cong Fu
- From the Department of Joint Orthopaedic Surgery, Jinhua Municipal Central Hospital, Zhejiang University, Jinhua City, Zhejiang Province, China
| | - Jia-Xing Zheng
- From the Department of Joint Orthopaedic Surgery, Jinhua Municipal Central Hospital, Zhejiang University, Jinhua City, Zhejiang Province, China
| | - Lian-Ping Jiang
- From the Department of Joint Orthopaedic Surgery, Jinhua Municipal Central Hospital, Zhejiang University, Jinhua City, Zhejiang Province, China
| | - Yong-Wei Zhou
- From the Department of Joint Orthopaedic Surgery, Jinhua Municipal Central Hospital, Zhejiang University, Jinhua City, Zhejiang Province, China
| | - Qi-Ning Yang
- From the Department of Joint Orthopaedic Surgery, Jinhua Municipal Central Hospital, Zhejiang University, Jinhua City, Zhejiang Province, China.
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Kung JE, Kaveeshwar S, Rocca M, Rivkin D, Hartline J, Packer JD, Meredith SJ, Leong NL, Henn RF. PROMIS cluster analysis predicts two-year outcomes in knee surgery patients. J Orthop 2023; 39:59-65. [PMID: 37125017 PMCID: PMC10139851 DOI: 10.1016/j.jor.2023.04.001] [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: 12/05/2022] [Revised: 03/26/2023] [Accepted: 04/05/2023] [Indexed: 05/02/2023] Open
Abstract
Aims & objectives Meaningful clinical interpretation of orthopaedic patient-reported outcome scores remains challenging. Grouping scores may be more meaningful than individual score analysis. The purpose of this study was to determine if grouping knee surgery patients into four preoperative Patient-Reported Outcomes Measurement Information System (PROMIS) clusters would have prognostic value for two-year postoperative outcomes. Materials & methods 488 of 697 (70%) patients undergoing elective knee surgery at a single urban institution were enrolled in an orthopaedic registry and completed two-year follow up. Patients were administered questionnaires for PROMIS, International Knee Documentation Committee Score (IKDC), Marx Activity Rating Scale (MARS), and Surgical Satisfaction (SSQ-8). A k-means cluster analysis was performed to identify preoperative PROMIS clusters. Chi-square or Kruskal-Wallis tests were conducted for bivariate analyses. Least-squares multiple linear regression models were performed to identify if cluster group was an independent predictor. Results Cluster analysis revealed four clusters of patients. Psychological distress was most significant in determining classification. More impaired clusters were associated with higher rates of arthroplasty, African American race, preoperative opioid use, lower income, higher comorbidity index, and other sociodemographic and operative factors. Worse preoperative cluster status was associated with higher chance of achieving minimally clinically important change (MCID) on all metrics except PROMIS Pain Interference (PI), IKDC, and MARS. Multivariable analysis confirmed better preoperative cluster as predictive of better PROMIS Physical Function (PF), PI, IKDC scores, and satisfaction. Worse preoperative cluster was predictive of greater improvement on PF and PI but not IKDC. Conclusion Preoperative PROMIS clusters have prognostic value in predicting outcomes for knee surgery patients. Better preoperative cluster function predicts superior outcomes. While worse preoperative cluster predicts worse outcome, all clusters still significantly improve, so worse preoperative cluster is not a contraindication to surgery.
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Affiliation(s)
- Justin E. Kung
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
- Orthopedic Surgery, Prisma Health Midlands/University of South Carolina, Columbia, SC, USA
| | - Samir Kaveeshwar
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Michael Rocca
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Daniel Rivkin
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Jacob Hartline
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Jonathan D. Packer
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Sean J. Meredith
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Natalie L. Leong
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - R. Frank Henn
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
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Preoperative Factors Associated with 2-Year Postoperative Survey Completion in Knee Surgery Patients. J Knee Surg 2022; 35:1320-1325. [PMID: 33545724 DOI: 10.1055/s-0041-1723764] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Patient-reported outcomes, such as the Patient-Reported Outcomes Measurement Information System (PROMIS) measures, have become increasingly valued as measures of treatment. The purpose of the study was to determine preoperative factors associated with survey compliance 2 years after elective knee surgery. Five hundred patients, age 17 years and older, undergoing knee surgery from August 2015 and March 2017 were administered questionnaires preoperatively and 2 years postoperatively. Questionnaires included the International Knee Documentation Committee (IKDC) score, Numeric Pain Scales (NPS), International Physical Activity Questionnaire (IPAQ), and six PROMIS Domains for physical function, pain interference, social satisfaction, fatigue, anxiety, and depression. Three hundred sixty-five patients (73.0%) completed both the preoperative and the 2-year surveys. A decreased likelihood of survey completion was significantly associated with black race, lower income, government-sponsored insurance, smoking, opioid use, fewer previous surgeries, lower expectations, lower PROMIS social satisfaction, higher PROMIS pain interference, and lower IPAQ physical activity. Multivariable logistic regression analysis confirmed that black race and lower IPAQ activity level were independent predictors of lower survey completion at 2-year follow-up with an area under the curve (AUC) of 0.62. A more robust multivariable model that included all variables with p < 0.05 in the bivariate analysis had an AUC of only 0.70. This study identified multiple preoperative factors that were associated with lower survey completion 2 years after elective orthopaedic knee surgery; however, all the factors measured in this study were not strong predictors of survey completion.
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Aneizi A, Sajak PMJ, Alqazzaz A, Weir T, Burt CI, Ventimiglia DJ, Leong NL, Packer JD, Henn RF. Impact of Preoperative Opioid Use on 2-Year Patient-Reported Outcomes in Knee Surgery Patients. J Knee Surg 2022; 35:511-520. [PMID: 32898898 DOI: 10.1055/s-0040-1716358] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The objectives of this study are to assess perioperative opioid use in patients undergoing knee surgery and to examine the relationship between preoperative opioid use and 2-year postoperative patient-reported outcomes (PROs). We hypothesized that preoperative opioid use and, more specifically, higher quantities of preoperative opioid use would be associated with worse PROs in knee surgery patients. We studied 192 patients undergoing knee surgery at a single urban institution. Patients completed multiple PRO measures preoperatively and 2-year postoperatively, including six patient-reported outcomes measurement information system (PROMIS) domains; the International Knee Documentation Committee (IKDC) questionnaire, numeric pain scale (NPS) scores for the operative knee and the rest of the body, Marx's knee activity rating scale, Tegner's activity scale, International Physical Activity Questionnaire, as well as measures of met expectations, overall improvement, and overall satisfaction. Total morphine equivalents (TMEs) were calculated from a regional prescription monitoring program. Eighty patients (41.7%) filled an opioid prescription preoperatively, and refill TMEs were significantly higher in this subpopulation. Opioid use was associated with unemployment, government insurance, smoking, depression, history of prior surgery, higher body mass index, greater comorbidities, and lower treatment expectations. Preoperative opioid use was associated with significantly worse 2-year scores on most PROs, including PROMIS physical function, pain interference, fatigue, social satisfaction, IKDC, NPS for the knee and rest of the body, and Marx's and Tegner's scales. There was a significant dose-dependent association between greater preoperative TMEs and worse scores for PROMIS physical function, pain interference, fatigue, social satisfaction, NPS body, and Marx's and Tegner's scales. Multivariable analysis confirmed that any preoperative opioid use, but not quantity of TMEs, was an independent predictor of worse 2-year scores for function, activity, and knee pain. Preoperative opioid use and TMEs were neither independent predictors of met expectations, satisfaction, patient-perceived improvement, nor improvement on any PROs. Our findings demonstrate that preoperative opioid use is associated with clinically relevant worse patient-reported knee function and pain after knee surgery.
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Affiliation(s)
- Ali Aneizi
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland
| | - Patrick M J Sajak
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland
| | - Aymen Alqazzaz
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland
| | - Tristan Weir
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland
| | - Cameran I Burt
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland
| | - Dominic J Ventimiglia
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland
| | - Natalie L Leong
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland
| | - Jonathan D Packer
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland
| | - R Frank Henn
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland
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Yang M, Yan C, Niu N, Lu Y, Yue W, Pan L. Analysis of the Need for Postoperative Drainage Application for Hip Arthroplasty: A Systematic Review and Meta-Analysis. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:2069468. [PMID: 35251296 PMCID: PMC8894062 DOI: 10.1155/2022/2069468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 01/10/2022] [Accepted: 01/15/2022] [Indexed: 11/18/2022]
Abstract
OBJECTIVE To synthesize the evidence regarding the effect and safety of drainage after the hip arthroplasty in randomized control trials. BACKGROUND Although the standard of hip replacement has matured in recent years, the need for postoperative drainage is still controversial which also is a clinical problem that needs to be addressed. DESIGN A systematic review and meta-analysis based on the Cochrane methods and Prisma guideline. Data Resources. A systematic search of the Cochrane Library, PubMed, EMBASE, CINAHL, Ovid, Wan Fang database, CNKI, and CBM database was carried out from January 1, 2000, to December, 2021. Review Methods. The quality of included randomized controlled trials was assessed individually by two reviewers independently using criteria recommended in the Cochrane Handbook for Systematic Reviews of Interventions 5.1.0. RESULTS Nineteen randomized control trials involving 3354 participants were included in this analysis. From the above analysis, we can know that compared with nondrainage, there was a statistically significant difference in VAS score on the postoperative first day (SD = -0.6; 95% CI: -0.79, -0.41) and second day (SD = -0.38, 95% CI: -0.58, -0.18), hematocrit reduction (MD =2.89; 95% CI: 1.3, 4.48), blood transfusion rate (OR =1.47; 95% CI: 1.12, 1.92), change of thigh circumstance (SMD = -0.48; 95% CI: -0.66, -0.31), and hospital stay (MD = 1.06; 95% CI: 0.73, 1.39) in drainage. However, there were no statistically significant differences in hemoglobin and hematocrit level, hip function, total blood loss, transfusion volume, dressing use, and complications between them. CONCLUSION Drainage after hip arthroplasty can reduce swelling in the thigh and relieve pain while no drainage can bring down hematocrit reduction, decrease dressing uses, and shorten the hospital stay which promotes rapid recovery. This review provides a detailed theoretical reference for the proper clinical application of drains and improves the efficient use of resources.
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Affiliation(s)
- Min Yang
- Department of Nursing, Hainan Provincial Hospital of Traditional Chinese Medicine Affiliated to Guangzhou University of Traditional Chinese Medicine, Haikou, Hainan 570203, China
| | - Chunwen Yan
- Department of Nursing, Hainan Provincial Hospital of Traditional Chinese Medicine Affiliated to Guangzhou University of Traditional Chinese Medicine, Haikou, Hainan 570203, China
| | - Nasha Niu
- Department of Nursing, Hainan Provincial Hospital of Traditional Chinese Medicine Affiliated to Guangzhou University of Traditional Chinese Medicine, Haikou, Hainan 570203, China
| | - Yingzi Lu
- School of Nursing, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, China
| | - Wei Yue
- School of Nursing, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, China
| | - Li Pan
- Department of Nursing, Hainan Provincial Hospital of Traditional Chinese Medicine Affiliated to Guangzhou University of Traditional Chinese Medicine, Haikou, Hainan 570203, China
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Karsalia M, Zhang T, Aneizi A, Foster MJ, Schneider MB, Sajak PM, Nadarajah V, Meredith SJ, Henn RF. Predictors of postoperative pain using PROMIS pain interference two-years following knee surgery. J Orthop 2021; 25:271-277. [PMID: 34099956 DOI: 10.1016/j.jor.2021.05.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 05/09/2021] [Indexed: 12/11/2022] Open
Abstract
Introduction The purpose of this study was to identify preoperative factors associated with worse PROMIS Pain Interference (PI) two years following knee surgery. Methods Participants completed surveys preoperatively and two years postoperatively. Data collected included demographics, medical history, and multiple patient-reported outcomes measures, including PROMIS PI. Results After controlling for confounders, lower income, smoking, worse PROMIS Anxiety, worse Numeric Pain Score body pain, and worse Marx Activity Rating Scale were independent predictors for worse PROMIS PI two years after surgery. Conclusion Worse PROMIS PI two years after elective knee surgery is associated with multiple socio-demographic patient identifiers.
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Affiliation(s)
- Moli Karsalia
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Tina Zhang
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Ali Aneizi
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Michael J Foster
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Matheus B Schneider
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Patrick Mj Sajak
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Vidushan Nadarajah
- Department of Orthopedic Surgery and Rehabilitation, SUNY Downstate Health Sciences University, Brooklyn, NY, USA
| | - Sean J Meredith
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
| | - R Frank Henn
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, USA
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Stevens KN, Nadarajah V, Jauregui JJ, Song X, Medina SH, Smuda MP, Packer JD, Henn RF. Preoperative Expectations of Patients Undergoing Knee Surgery. J Knee Surg 2021; 34:612-620. [PMID: 31639850 DOI: 10.1055/s-0039-1698805] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
There is limited validated data regarding the relationship between preoperative expectations and patient-reported outcomes (PROs) in patients undergoing knee surgery. The purpose of this study was to (1) assess the preoperative expectations of patients undergoing knee surgery and (2) determine the relationship between preoperative patient demographics, PROs, and preoperative patient expectations. We hypothesized that younger patients with worse function and worse general health status would have greater expectations of knee surgery. We analyzed data from 399 patients undergoing knee surgery at an urban academic medical center. We utilized the Musculoskeletal Outcomes Data Evaluation and Management System to measure preoperative expectations. Multiple legacy PRO measures were recorded, as well as the new Patient-Reported Outcomes Measurement Information Systems (PROMIS) Computer Adaptive Testing. Nonparametric statistical analyses were performed to determine significance. Overall, patients undergoing knee surgery had high expectations, with a mean of 88.0 (95% confidence interval [CI], 86.7-89.3) and median of 91.7 (95% CI, 89.2-94.3). Greater preoperative expectations of knee surgery were associated with higher income, surgically naïve knee, lower Charlson Comorbidity Index, better PROMIS Depression and Anxiety scores, greater Marx knee activity scores, and lower total body pain (p < 0.05). Preoperative expectations of patients undergoing knee surgery are associated with a history of prior knee surgery, income, general and mental health, activity, and pain. Expectations were also found to be associated with PRO measures of function and psychological well-being. These findings may have implications for patient education and shared decision-making preoperatively. The level of evidence for the study is IV.
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Affiliation(s)
- Kali N Stevens
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland
| | - Vidushan Nadarajah
- Department of Orthopaedic Surgery and Rehabilitation, SUNY Downstate College of Medicine, Brooklyn, New York
| | - Julio J Jauregui
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland
| | - Xuyang Song
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland
| | - Shaun H Medina
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland
| | - Michael P Smuda
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland
| | - Jonathan D Packer
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland
| | - R Frank Henn
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland
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La A, Nadarajah V, Jauregui JJ, Shield WP, Medina SH, Dubina AG, Meredith SJ, Packer JD, Henn RF. Clinical characteristics associated with depression or anxiety among patients presenting for knee surgery. J Clin Orthop Trauma 2020; 11:S164-S170. [PMID: 31992939 PMCID: PMC6977163 DOI: 10.1016/j.jcot.2019.08.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 08/10/2019] [Accepted: 08/12/2019] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Preoperative depression and anxiety in patients undergoing surgery have been shown to be associated with increased postoperative complications, decreased functional improvement, and long-term dissatisfaction. The purpose of this prospective study was to measure the relationship between a diagnosis of depression or anxiety and Patient-Reported Outcomes Measurement Information System (PROMIS) domains, as well as determine which preoperative factors are associated with depression or anxiety in patients undergoing knee surgery. We hypothesized that preoperative depression and/or anxiety would be associated with worse preoperative pain, function, and general health status. METHODS Three-hundred and eighty-six patients undergoing knee surgery between 2015 and 2017 were administered health-related quality of life measures preoperatively, and their medical records were reviewed for relevant medical history. A propensity matched analysis was performed to determine clinical factors independently associated with preoperative depression and/or anxiety. RESULTS The overall study population consisted of 216 males and 170 females, with a mean age of 39.4 ± 16.2 years. From this overall cohort, 43 (11.1%) patients had a positive preoperative diagnosis of depression and/or anxiety. After controlling for covariate imbalances, preoperative depression/anxiety was independently associated with PROMIS Anxiety (p = 0.018), PROMIS Depression (p < 0.019), and Tegner pre-injury (p = 0.013) scores. Regression analysis also determined that preoperative depression/anxiety was independently associated with arthroscopic anterior cruciate ligament reconstruction (ACLR) (p = 0.004), total knee arthroplasty (TKA) (p = 0.019), and uni-compartmental knee arthroplasty (p < 0.05). CONCLUSION The results support our hypothesis that preoperative depression/anxiety is associated with worse preoperative pain, function, and general health status. Furthermore, PROMIS Anxiety and Depression tools offer a reliable means of measuring psychological distress in the orthopaedic knee population. Similar to other studies, we also noted psychological comorbidity to be independently associated with ACLR and TKA.
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Affiliation(s)
- Ashley La
- Department of Orthopaedic Surgery, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Vidushan Nadarajah
- Department of Orthopaedic Surgery, SUNY Downstate Medical Center, Brooklyn, NY, USA
| | - Julio J. Jauregui
- Department of Orthopaedic Surgery, University of Maryland School of Medicine, Baltimore, MD, USA
| | - William P. Shield
- Department of Orthopaedic Surgery, University of Maryland School of Medicine, Baltimore, MD, USA
| | | | - Andrew G. Dubina
- Department of Orthopaedic Surgery, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Sean J. Meredith
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Jonathan D. Packer
- Department of Orthopaedic Surgery, University of Maryland School of Medicine, Baltimore, MD, USA
| | - R. Frank Henn
- Department of Orthopaedic Surgery, University of Maryland School of Medicine, Baltimore, MD, USA
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