Table 2 Comparisons of intraoperative parameters among different BMI groups
From: Obesity paradox among patients undergoing total knee arthroplasty: a retrospective cohort study
Underweight | Normal weight | Overweight | Obese | P | |||
|---|---|---|---|---|---|---|---|
(n = 27) | (n = 905) | I(n = 863) | II(n = 615) | I(n = 500) | II(n = 59) | ||
Duration of surgery(minutes) | 130 ± 55 | 119 ± 54 | 124 ± 54 | 125 ± 55 | 130 ± 57 | 142 ± 65 | 0.001 |
Duration of tourniquet(minutes) | 94 ± 46 | 98 ± 48 | 106 ± 49 | 106 ± 49 | 111 ± 51 | 109 ± 52 | < 0.001 |
Anesthesia method | 0.120 | ||||||
General anesthesia | 24(88.9%) | 843(93.1%) | 818(94.8%) | 584(95.0%) | 482(96.4%) | 56(94.9%) | |
Intrathecal anesthesia | 3(11.1%) | 62(6.9%) | 45(5.2%) | 31(5.0%) | 18(3.6%) | 3(5.1%) | |
The type of surgery | 0.010 | ||||||
Unilateral TKA | 19(70.4%) | 644(71.2%) | 555(64.3%) | 402(65.4%) | 314(62.8%) | 36(61%) | |
Bilateral TKA | 8(29.6%) | 261(28.8%) | 308(35.7%) | 213(34.6%) | 186(37.2%) | 23(39.0%) | |