It is crucial to understand weight trends in patients undergoing total hip arthroplasty (THA).
OBJECTIVE:
To evaluate preoperative and postoperative weight trends for patients undergoing primary THA and factors associated with clinically significant weight change.
METHODS:
A prospective cohort who underwent primary unilateral THA ( 3,011) at a tertiary healthcare system (January 2016 to December 2019) were included in the study. The primary outcomes were clinically significant weight change ( 5% change in body mass index [BMI]) during the one-year preoperative and one-year postoperative periods.
RESULTS:
Preoperatively, 66.6% maintained a stable weight, 16.0% gained and 17.4% lost weight, respectively. Postoperatively, 64.0% maintained a stable weight, while 22.6% gained and 13.4% lost weight, respectively. Female sex, Black race, obesity, higher Charlson Comorbidity Index (CCI) scores, and older age were associated with preoperative weight loss. Female sex, obesity, higher CCI scores, and Medicare insurance were associated with postoperative weight loss. Preoperative weight loss was associated with postoperative weight gain (OR 3.37 [CI: 2.67 to 4.25]; 0.001), and preoperative weight gain was associated with postoperative weight loss (OR 1.74 [CI: 1.30 to 2.3]; 0.001).
CONCLUSION:
Most patients maintained a stable BMI one-year before and one-year after THA. Several factors are associated with weight loss before and after THA. Preoperative weight changes were associated with a reciprocal rebound in BMI post-operatively.
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