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      Trainee Surgeons Affect Operative Time but not Outcome in Minimally Invasive Total Hip Arthroplasty

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          Abstract

          Training of young surgeons in total hip arthroplasty (THA) is crucial, but might affect operative time and outcome especially in minimally invasive (MIS) THA. We asked whether the learning curve of orthopaedic residents trained on MIS THA has an impact on (1) operative time (2) complication rates and (3) early postoperative outcome. In a retrospective analysis of over 1000 MIS THAs from our institutional joint registry, operative time, complication rates, patient reported outcome measures (Western Ontario and McMaster Universities Arthritis Index [WOMAC] and Euro-Qol 5D-5L [EQ-5D]) within the first year and responder rates for positive outcome as defined by the Outcome Measures in Rheumatology and Osteoarthritis Research Society International consensus responder (OMERACT-OARSI) criteria were compared between trainee and senior surgeons. Mean operative time was nine minutes longer for trainees compared to senior surgeons (78.1 ± 25.4 min versus 69.3 ± 23.8 min, p < 0.001). Dislocation (p = 0.21), intraoperative fracture (p = 0.84) and infection rates (p = 0.58) were comparably low in both groups. Both trainee and senior THAs showed excellent improvement of EQ-5D (0.34 ± 0.26 versus 0.32 ± 0.23, p = 0.40) and WOMAC (45.9 ± 22.1 versus 44.9 ± 20.0, p = 0.51) within the first year after surgery without clinical relevant differences. Similarly, responder rates for positive outcome were comparable between trainees with 92.9% and senior surgeons with 95.2% (p = 0.17). MIS THA seems to be a safe procedure during the learning curve of young orthopaedic specialists, but requires higher operative time.

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          The effect of age on pain, function, and quality of life after total hip and knee arthroplasty.

          As utilization rates for total joint arthroplasty increase, there is a hesitancy to perform this surgery on very old patients. The objective of this prospective study was to compare pain, functional, and health-related quality-of-life outcomes after total hip and total knee arthroplasty in an older patient group (> or =80 years) and a representative younger patient group (55-79 years). In an inception community-based cohort within a Canadian health care system, 454 patients who received primary total hip arthroplasty (n = 197) or total knee arthroplasty (n = 257) were evaluated within a month prior to surgery and 6 months postoperatively. Pain, function, and health-related quality of life were evaluated with the Western Ontario and McMaster Universities (WOMAC) Osteoarthritis Index and the 36-Item Short-Form Health Survey (SF-36). There were no age-related differences in joint pain, function, or quality-of-life measures preoperatively or 6 months postoperatively. Furthermore, after adjusting for potential confounding effects, age was not a significant determinant of pain or function. Although those in the older and younger groups had comparable numbers of comorbid conditions and complications, those in the older group were more likely to be transferred to a rehabilitation facility than younger patients. Regardless of age, patients did not achieve comparable overall physical health when matched with the general population for age and sex. With increasing life expectancy and elective surgery improving quality of life, age alone is not a factor that affects the outcome of joint arthroplasty and should not be a limiting factor when considering who should receive this surgery.
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            Predictors of patient relevant outcome after total hip replacement for osteoarthritis: a prospective study.

            To investigate prospectively long term patient relevant outcomes after unilateral total hip replacement (THR) for osteoarthritis (OA). To identify non-responders to this intervention and patient related predictors of unsatisfactory outcome. A case-control study comparing health related quality of life of 219 patients (mean age 71) after THR with that of a matched reference group of 117 subjects without hip complaints recruited from the community. Patients and reference group answered SF-36 and WOMAC questionnaires preoperatively, at 3, 6, 12 months, and at 3.6 years (range 26-65 months) postoperatively. Supplementary questions were asked at the final follow up. 198/211 (94%) of the patients and 83/109 (76%) of the reference group participated at the final follow up. At follow up, the only difference between the two groups in the SF-36 was physical function, where patients scored worse. Patients also reported worse WOMAC function. 31% of the patients had improved by <10/100 WOMAC score points for pain and/or function at final follow up, compared with preoperatively. More pain preoperatively and higher age and postoperative low back pain predicted a worse outcome in WOMAC function. 3.6 years after THR for OA, health related quality of life was similar for patients and reference group except for function, where patients had worse function. Higher age and more pain preoperatively predicted a poor outcome. Patients with hip OA with musculoskeletal comorbidities, such as low back pain and OA of the non-operated hip, have less long term functional improvement after THR.
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              Responsiveness and clinically important differences for the WOMAC and SF-36 after hip joint replacement.

              To study responsiveness and establish the minimal clinically important differences (MCID) and minimal detectable change (MDC) in patients undergoing total hip replacement (THR) using the Short Form 36 (SF-36) and the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC). We conducted a prospective observational study in three public hospitals of all consecutive patients with a diagnosis of hip osteoarthritis (OA) on waiting lists to undergo THR. Patients completed the SF-36 and the WOMAC (subscales transformed to 0 to 100), which measured the health-related quality of life (HRQoL), before intervention and 6 months and 2 years later, and additional transitional questions, which measured the changes in the joint 6 months postoperatively. Improvements at 6 months after a THR were between 37 (stiffness) and 39 points (pain), depending on the WOMAC domain. The SF-36 domains also showed improvements: physical function (31.91), physical role (33.71), and bodily pain (29.77). From 6 months to 2 years, improvements ranged from 2 to 5 points, except for role physical (13.25). A ceiling effect was detected on some WOMAC domains as well as a floor effect on the SF-36. The MCID ranged from 25.91 (stiffness) to 29.26 (pain) on the WOMAC and from 10.78 (physical role) to 20.40 (physical function) on the SF-36. The MDC ranged from 21.38 (pain) to 27.98 (stiffness) on the WOMAC and from 18.99 (physical function) to 42.05 (social function) on the SF-36. These values indicate expected gains after THR. However, the MCID and MDC values must be viewed cautiously due to the uncertainty of these estimators and should not be considered as absolute thresholds.
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                Author and article information

                Contributors
                markus.weber@klinik.uni-regensburg.de
                Journal
                Sci Rep
                Sci Rep
                Scientific Reports
                Nature Publishing Group UK (London )
                2045-2322
                21 July 2017
                21 July 2017
                2017
                : 7
                : 6152
                Affiliations
                [1 ]ISNI 0000 0001 2190 5763, GRID grid.7727.5, Department of Orthopedic Surgery, , Regensburg University, Medical Centre, ; Bad Abbach, Germany
                [2 ]ISNI 0000 0001 2190 5763, GRID grid.7727.5, Department of Haematology and Oncology, , Regensburg University, Medical Centre, ; Regensburg, Germany
                Article
                6530
                10.1038/s41598-017-06530-3
                5522387
                28733672
                310185be-b1ca-4702-a331-bff3e93b0031
                © The Author(s) 2017

                Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

                History
                : 7 March 2017
                : 14 June 2017
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