Table 2.
Perioperative Hypothermia
| Variable | 10-min pre-warming group (n = 28) | Control group (n = 28) | Differences (95% CI) | Effect size (95% CI) | P value |
|---|---|---|---|---|---|
| Intraoperative hypothermia (< 36ºC) | 3 (10.7) | 8 (28.6) | –17.9% (–3.4% to 39.6%) | –0.225 (–0.454 to 0.038) | 0.177 |
| Onset of intraoperative hypothermia | 0.378 (0.187 to 0.542) | 0.013 | |||
| Normothermia | 25 (89.3) | 20 (71.4) | |||
| Within 1 h | 1 (3.6) | 8 (28.6) | |||
| After 1 h | 2 (7.1) | 0 (0) | |||
| PACU hypothermia (< 36ºC) | 3 (10.7) | 3 (10.7) | 0% (–18.5% to 18.5%) | 0.000 (–0.272 to 0.258) | 1.000 |
| Shivering grade | 0.192 (0.117 to 0.345) | 0.491 | |||
| Grade 0 | 26 (92.9) | 28 (100.0) | |||
| Grade 1 | 1 (3.6) | 0 (0) | |||
| Grade 2 | 1 (3.6) | 0 (0) |
Values are presented as the number (%). All cases of perioperative hypothermia were mild, falling between 35.0ºC and 36.0ºC. CI: confidence interval, PACU: post-anesthesia care unit. Effect sizes of the chi-squared test are phi or Cramer’s V as appropriate. P value by Fisher's exact test.