Table 1 Demographic and clinical characteristics of the patients (n = 1467)
Variable | Hypothermia (n = 1067) | Normothermia (n = 400) | P value |
|---|---|---|---|
Age (yr) | 60 [53–67] | 56 [48–64] | < 0.001* |
Sex | 0.057 | ||
female | 577 (54.1%) | 194 (48.5%) | |
male | 490 (45.9%) | 206 (51.5%) | |
BMI (kg/m2) | 23.81 [21.80–25.80] | 24.75 [22.68–26.89] | < 0.001* |
< 24 | 563 (52.8%) | 164 (41.0%) | |
≥ 24 | 504 (47.2%) | 236 (59.0%) | |
BSA (m2) | 1.80 [1.69–1.92] | 1.86 [1.73–2.01] | < 0.001* |
≤ 1.83 | 626 (58.7%) | 186 (46.5%) | |
> 1.83 | 441 (41.3%) | 214 (53.5%) | |
ASA | 0.516 | ||
I | 175 (16.4%) | 73 (18.3%) | |
II | 811 (76.0%) | 302 (75.5%) | |
III | 81 (7.6%) | 25 (6.3%) | |
Duration of Preparation (min) | 60 [49–72] | 54 [46–66] | < 0.001* |
≤ 1 h | 551 (51.6%) | 263 (65.8%) | |
> 1 h | 516 (48.4%) | 137 (34.3%) | |
Time of Surgery | < 0.001* | ||
Morning | 616 (57.7%) | 162 (40.5%) | |
Afternoon | 451 (42.3%) | 238 (59.5%) | |
Duration of Surgery (min) | 122 [94–156] | 100.5 [74–130] | < 0.001* |
≤ 2 h | 511 (47.9%) | 267 (66.8%) | |
> 2 h | 556 (52.1%) | 133 (33.3%) | |
Time in OR (min) | 201 [168–237] | 174 [140.5–210] | < 0.001* |
≤ 3 h | 378 (35.4%) | 227 (56.8%) | |
> 3 h | 689 (64.6%) | 173 (43.3%) | |
OR temperature (°C) | 22.6 [22.3–23.0] | 22.7 [22.4–23.1] | < 0.001* |
OR humidity (%) | 40 [36–51] | 39 [36–48] | < 0.001* |
Type of Surgery | < 0.001* | ||
wedge resection | 281 (26.3%) | 153 (38.3%) | |
lobectomy | 667 (62.5%) | 189 (47.3%) | |
mediastinum | 98 (9.2%) | 46 (11.5%) | |
others | 21 (2.0%) | 12 (3.0%) | |
Type of Anesthesia | < 0.001* | ||
general anesthesia alone | 289 (27.1%) | 99 (24.8%) | |
PVB before intubation | 632 (59.2%) | 283 (70.8%) | |
PVB after intubation | 146 (13.7%) | 18 (4.5%) | |
LOS in the hospital (day) | 9 [7–11] | 8 [7–10] | < 0.001* |