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Table 2 Within-subjects BMI change after TKA surgery

From: Weight changes after total knee arthroplasty in Chinese patients: a matched cohort study regarding predictors and outcomes

Parameters Preoperative (BMI) 2 years postoperative (BMI) Change in BMI, mean (95% CI) p value
All TKA patients (n = 202) 26.40 ± 3.12 25.93 ± 2.87 0.470 (0.322 to 0.618) < 0.001*
Simultaneous bilateral TKA patients (n = 49) 26.15 ± 2.74 25.20 ± 2.37 0.950 (0.673 to 1.226) < 0.001*
Staged bilateral TKA patients (n = 52) 26.45 ± 3.43 26.40 ± 3.19 0.046 (− 0.201 to 0.293) 0.712
Unilateral TKA patients (n = 101) 26.49 ± 3.14 26.03 ± 2.87 0.456 (0.237 to 0.676) < 0.001*
  1. CI confidence interval
  2. *Significant difference