1
|
Pavlovic N, Harris IA, Boland R, Brady B, Genel F, Naylor J. The effect of body mass index and preoperative weight loss in people with obesity on postoperative outcomes to 6 months following total hip or knee arthroplasty: a retrospective study. Arthroplasty 2023; 5:48. [PMID: 37777817 PMCID: PMC10544191 DOI: 10.1186/s42836-023-00203-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Accepted: 07/25/2023] [Indexed: 10/02/2023] Open
Abstract
BACKGROUND Few studies have investigated the association between obesity, preoperative weight loss and postoperative outcomes beyond 30- and 90-days post-arthroplasty. This study investigated whether body mass index (BMI) and preoperative weight loss in people with obesity predict postoperative complications and patient-reported outcomes 6 months following total knee or hip arthroplasty. METHODS Two independent, prospectively collected datasets of people undergoing primary total knee or hip arthroplasty for osteoarthritis between January 2013 and June 2018 at two public hospitals were merged. First, the sample was grouped into BMI categories, < 35 kg/m2 and ≥ 35 kg/m2. Subgroup analysis was completed separately for hips and knees. Second, a sample of people with BMI ≥ 30 kg/m2 was stratified into participants who did or did not lose ≥ 5% of their baseline weight preoperatively. The presence of postoperative complications, Oxford Hip Score, Oxford Knee Score, EuroQol Visual Analogue Scale and patient-rated improvement 6 months post-surgery were compared using unadjusted and adjusted techniques. RESULTS From 3,552 and 9,562 patients identified from the datasets, 1,337 were included in the analysis after merging. After adjustment for covariates, there was no difference in postoperative complication rate to 6 months post-surgery according to BMI category (OR 1.0, 95%CI 0.8-1.4, P = 0.8) or preoperative weight loss (OR 1.1, 95%CI 0.7-1.8, P = 0.7). There was no between-group difference according to BMI or preoperative weight change for any patient-reported outcomes 6 months post-surgery. CONCLUSION Preoperative BMI or a 5% reduction in preoperative BMI in people with obesity was not associated with postoperative outcomes to 6 months following total knee or hip arthroplasty.
Collapse
Affiliation(s)
- Natalie Pavlovic
- South Western Sydney Clinical School, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW, 2170, Australia.
- Fairfield Hospital, South Western Sydney Local Health District, Sydney, NSW, 2176, Australia.
| | - Ian A Harris
- South Western Sydney Clinical School, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW, 2170, Australia
- Whitlam Orthopaedic Research Centre, Ingham Institute for Applied Medical Research, Sydney, NSW, 2170, Australia
- School of Clinical Medicine, UNSW Medicine and Health, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Robert Boland
- Fairfield Hospital, South Western Sydney Local Health District, Sydney, NSW, 2176, Australia
- Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Bernadette Brady
- Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, 2006, Australia
- Liverpool Hospital, South Western Sydney Local Health District, Sydney, NSW, 2170, Australia
- School of Health Sciences, Western Sydney University, Sydney, NSW, 2560, Australia
| | - Furkan Genel
- Whitlam Orthopaedic Research Centre, Ingham Institute for Applied Medical Research, Sydney, NSW, 2170, Australia
- Faculty of Medicine and Health, St George and Sutherland Clinical School, University of New South Wales, Sydney, NSW, 2217, Australia
| | - Justine Naylor
- South Western Sydney Clinical School, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW, 2170, Australia
- Whitlam Orthopaedic Research Centre, Ingham Institute for Applied Medical Research, Sydney, NSW, 2170, Australia
| |
Collapse
|