- Comparison of mechanical power according to body mass index groups.
| Parameters | BMI groups | P-values | |||
|---|---|---|---|---|---|
| <30 | ≥30 | ||||
| Mean±SD | Median (min-max) | Mean±SD | Median (min-max) | ||
| T1 MP (J/min) | 6.26±1.48 | 5.97 (3.81-11.39) | 6.86±1.06 | 6.87 (4.99-8.9) | 0.011** |
| T2 MP (J/min) | 6.77±1.4 | 6.67 (4.38-10.47) | 7.64±1.13 | 7.36 (5.53-11.05) | 0.001** |
| T3 MP (J/min) | 7.14±1.29 | 7.01 (4.56-11.11) | 8.32±1.19 | 8.08 (6.38-10.76) | <0.001* |
| MP 2H (J/min) | 7.03±1.19 | 7.17 (4.69-9.42) | 8.15±1.15 | 7.82 (6.68-10.47) | 0.002** |
| MP 3H (J/min) | 7.22±1.4 | 7.14 (4.88-9.97) | 8.29±1.74 | 8.05 (5.19-14.86) | 0.023** |
| MP 4H (J/min) | 6.92±0.95 | 7.08 (4.89-8.52) | 7.92±0.79 | 7.79 (6.9-9.2) | 0.012* |
| T4 MP (J/min) | 7.05±1.13 | 7.08 (4.58-10.24) | 8.14±1.6 | 7.69 (5.78-15.52) | <0.001** |
| T5 MP (J/min) | 6.71±1.57 | 6.31 (3.69-10.42) | 7.45±1.26 | 7.34 (5.57-13.03) | 0.008** |
Values are presented as mean ± standard deviation (SD) and median (minimum-maximum).
↵* Independent samples t-test.
↵** Mann Whitney U test.
BMI: body mass index, H: hour, MP: mechanical power, T1: 15th minute in the supine position, T2: 15th minute into the first prone position, T3: at the first hour in the prone position, T4: at the conclusion of the surgery in the final prone position, T5: in the final supine position, 15 minutes after return