Table 6 Results of unadjusted regression models for postoperative complications and patient-reported outcome measures according to BMI and preoperative weight change
BMI ≥ 35 kg/m2 vs. BMI < 35 kg/m2 | Lost 5% of baseline weight vs. weight unchanged or increased | ||||
|---|---|---|---|---|---|
Overall sample (n = 1,337) | THA (n = 399) | TKA (n = 938) | Overall sample (n = 809) | TKA (n = 616) | |
Overall complications to 6 months post-surgery OR (95% CI) | 1.1 (0.9, 1.5), P = 0.3 | 1.4 (0.8, 2.2), P = 0.2 | 1.0 (0.8, 1.3), P = 0.9 | 1.1 (0.7, 1.7), P = 0.6 | 0.7 (0.4, 1.2), P = 0.2 |
Major complications to 6 months post-surgery OR (95% CI) | 1.0 (0.7, 1.4), P = 1.0 | 1.1 (0.5, 2.2), P = 0.8 | 1.0 (0.6, 1.5), P = 0.9 | 1.1 (0.6, 2.1), P = 0.7 | 0.6 (0.2, 1.3), P = 0.2 |
Major complications to discharge OR (95% CI) | 1.0 (0.6, 1.6), P = 1.0 | 1.7 (0.6, 4.1), P = 0.3 | 0.8 (0.4, 1.5), P = 0.6 | 1.2 (0.4, 2.6), P = 0.7 | 0.5 (0.1, 1.8), P = 0.4 |
Oxford Score at 6 months post-surgery Mean (95% CI) | -0.9 (-1.9, 0.02), P = 0.05 | - | - | 0.3 (-1.5, 2.0), P = 0.8 | - |
EQ-VAS at 6 months post-surgery Mean (95% CI) | -4.0 (-6.2, -1.8), P < 0.05 | - | - | 0.6 (-3.5, 4.6), P = 0.8 | - |
Patient-rated improvement from surgery OR (95% CI) | 1.0 (0.7, 1.3), P = 0.9 | - | - | 0.9 (0.5, 1.5), P = 0.6 | - |