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No clinically meaningful weight changes in a young cohort following total joint arthroplasty at 3‐year follow‐up
Author(s) -
Formby Peter M.,
Purcell Richard L.,
Baird Michael,
Wagner Matthew,
Goodlett Ronald P.,
Mack Andrew W.
Publication year - 2016
Publication title -
anz journal of surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.426
H-Index - 70
eISSN - 1445-2197
pISSN - 1445-1433
DOI - 10.1111/ans.13765
Subject(s) - medicine , joint arthroplasty , cohort , body mass index , weight gain , arthroplasty , weight change , weight loss , retrospective cohort study , total knee arthroplasty , obesity , cohort study , surgery , physical therapy , body weight
Background Total joint arthroplasty ( TJA ) is one of the most successful operations. There is little in the literature regarding weight change following TJA , particularly in a young cohort. Methods Retrospective analysis of 181 primary total hip arthroplasty ( THA ) and 185 primary total knee arthroplasty ( TKA ) patients was conducted. We reviewed preoperative and post‐operative weights and post‐operative body mass index at 3 and 6 months, 1 year, 2 and 3 years. We evaluated expected versus actual weight gain, and performed subgroup analyses of obese versus non‐obese patients and active duty versus civilian patients. We used a minimal clinically meaningful weight change from baseline of ≥5%. Results One hundred and fifty‐one (41.3%) patients were active duty military service members with the mean age of 53 ± 11.1 years. In TKA patients, statistically significant differences were found in mean weights at 3 months (−1.8%, P ≤ 0.0001) and 2 years (+1.9%, P = 0.0006). In THA patients, statistically significant weight gains were found at 6 months (+1.1%, P = 0.006). For obese TKA patients, significant weight changes were observed at 3 months (−2.5%, P ≤ 0.0001), and none in the obese THA group. There were no statistical or clinically meaningful weight changes in the non‐obese TKA or THA groups. There was a clinically meaningful weight gain in active duty TKA patients at 3 years (5.18%, P = 0.17). Conclusion Despite a theoretical ability to lose weight following TJA , patients maintain their preoperative weight following TJA . We found a clinically meaningful weight gain at 3 years post‐operatively only in active duty TKA patients. Overall, however, we found no clinically significant weight changes following TJA at 3‐year follow‐up.