Table II.
Comparison of surgical variables between the two groups.
| Variable | Group A (n = 86) | Group B (n = 172) | Mean difference (95% CI) | p-value |
|---|---|---|---|---|
| Mean set-up time on operating table, mins (SD) | 15.03 (1.70) | 5.28 (1.00) | 9.75 (9.42 to 10.09) | < 0.001* |
| Mean operating time, mins (SD) | 70.12 (3.13) | 55.12 (4.45) | 15.00 (14.06 to 15.94) | < 0.001* |
| Mean incision length, cm (SD) | 9.01 (0.73) | 7.12 (0.98) | 1.90 (1.68 to 2.10) | < 0.001† |
| Mean acetabular component inclination, ° (SD, range) | 42.31 (1.31, 40 to 46) | 42.46 (1.60, 40 to 47) | 0.721* | |
| Mean acetabular component anteversion, ° (SD, range) | 20.05 (1.78, 16 to 24) | 20.02 (1.81, 15 to 25) | 0.783* | |
| Mean LLD, mm (SD) | 0.78 (2.04) | 0.81 (2.13) | 0.683* |
Group A = patients with BMI ≥ 40 kg/m2
Group B = patients with BMI < 30 kg/m2
*
Mann-Whitney U test
†
ndependent-samples t-test
CI, confidence interval; Group A, morbidly obese; Group B, nonobese; LLD, leg length discrepancy; SD, standard deviation.