PMID- 28879594 OWN - NLM STAT- MEDLINE DCOM- 20180925 LR - 20181113 IS - 1433-7347 (Electronic) IS - 0942-2056 (Linking) VI - 26 IP - 6 DP - 2018 Jun TI - Body mass index changes after unicompartmental knee arthroplasty do not adversely influence patient outcomes. PG - 1691-1697 LID - 10.1007/s00167-017-4703-7 [doi] AB - PURPOSE: The objective of this study is to evaluate the prevalence of patients who lost or gained weight following unicompartmental knee arthroplasty (UKA), the effect of post-operative body mass index (BMI) changes on functional outcomes and quality of life (QoL), and predictive factors associated with BMI changes. METHODS: Prospectively collected data of 1043 patients who underwent UKA between 2000 and 2014 were reviewed. BMI, Knee Society Knee Score and Function Score, Oxford Knee Score (OKS), Short-Form 36 (SF-36) Physical Component Score (PCS) and Mental Component Score and proportion of patients attaining OKS/SF-36 minimal clinically important differences (MCID) were recorded preoperatively and at 2 years post-operatively. The patients were stratified into three groups based on weight changes for further analysis. RESULTS: Following UKA, 138 (13.3%) patients had lost weight, 695 (66.6%) maintained their weight, and 210 (20.1%) gained weight. Patients in all groups demonstrated significant improvements in functional and SF-36 PCS scores at 2 years post-operatively. There were no significant differences in functional outcomes, QoL or revision rate between the groups. Post-operative BMI changes were not correlated with any outcome scores or attainment of MCID (n.s.). CONCLUSIONS: This is the first study that evaluates change in BMI following UKA. It demonstrated a higher proportion of patients who gained weight as compared to those who lost weight. Post-operative BMI changes did not appear to affect outcomes of UKA. These findings will provide important information to surgeons when counselling patients regarding BMI change and its effect on outcomes after UKA. LEVELS OF EVIDENCE: Level III. FAU - Xia, Zhan AU - Xia Z AUID- ORCID: 0000-0002-5888-0042 AD - Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Singapore, 169608, Singapore. williamxia0402@gmail.com. FAU - Liow, Ming Han Lincoln AU - Liow MHL AD - Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Singapore, 169608, Singapore. FAU - Goh, Graham Seow-Hng AU - Goh GS AD - Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Singapore, 169608, Singapore. FAU - Chong, Hwei Chi AU - Chong HC AD - Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Singapore, 169608, Singapore. FAU - Lo, Ngai Nung AU - Lo NN AD - Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Singapore, 169608, Singapore. FAU - Yeo, Seng Jin AU - Yeo SJ AD - Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Singapore, 169608, Singapore. LA - eng PT - Journal Article DEP - 20170906 PL - Germany TA - Knee Surg Sports Traumatol Arthrosc JT - Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA JID - 9314730 SB - IM MH - Aged MH - Arthroplasty, Replacement, Knee/*adverse effects MH - *Body Mass Index MH - Female MH - Humans MH - Male MH - Middle Aged MH - Osteoarthritis, Knee/physiopathology/*surgery MH - Quality of Life MH - Recovery of Function MH - Treatment Outcome MH - Weight Gain MH - Weight Loss OTO - NOTNLM OT - Body mass index OT - Functional outcomes OT - Quality of life OT - Unicompartmental knee arthroplasty EDAT- 2017/09/08 06:00 MHDA- 2018/09/27 06:00 CRDT- 2017/09/08 06:00 PHST- 2017/03/16 00:00 [received] PHST- 2017/08/30 00:00 [accepted] PHST- 2017/09/08 06:00 [pubmed] PHST- 2018/09/27 06:00 [medline] PHST- 2017/09/08 06:00 [entrez] AID - 10.1007/s00167-017-4703-7 [pii] AID - 10.1007/s00167-017-4703-7 [doi] PST - ppublish SO - Knee Surg Sports Traumatol Arthrosc. 2018 Jun;26(6):1691-1697. doi: 10.1007/s00167-017-4703-7. Epub 2017 Sep 6.