Table 1.
Patient demographics and anesthesia/surgery data (N = 833).
| IOH (N = 344) | No IOH (N = 489) | P-value | |
|---|---|---|---|
| Age | 54 ± 15 | 48 ± 15 | < 0.01 |
| Female | 182 (53) | 313 (64) | < 0.01 |
| BMI, mean ± SD | 26 ± 6 | 27 ± 7 | < 0.01 |
| Diabetes | 40 (12) | 46 (9) | 0.36 |
| ASA | 0.33 | ||
| 1 | 6 (2) | 5 (11) | |
| 2 | 252 (73) | 384 (79) | |
| 3 | 85 (25) | 99 (20) | |
| 4 | 1 (< 1) | 1 (< 1) | |
| Anesthesia induction time | < 0.01 | ||
| Morning | 195 (57) | 190 (39) | |
| Afternoon | 102 (30) | 198 (40) | |
| Evening | 47 (14) | 101 (21) | |
| Surgical site (%) | < 0.01 | ||
| Abdominal | 239 (69) | 351 (72) | |
| Thoracic | 65 (19) | 53 (11) | |
| Thyroid | 40 (12) | 85 (17) | |
| Surgical duration (min) | 224 ± 90 | 200 ± 72 | < 0.01 |
| Baseline core temperature | 36.1 ± 0.3 | 36.6 ± 0.3 | < 0.01 |
| Room temperature | 23.7 ± 1.1 | 23.8 ± 1.1 | 0.17 |
Data are summarized as the mean ± SD or N (%).
IOH, inadvertent intraoperative hypothermia; BMI, body mass index; ASA, American Society of Anesthesiologists; SD, standard deviation.