Table 3.
Multivariate logistic regression for inadvertent intraoperative hypothermia rates
| β | Wald | Adjusted odds ratio | 95% confidence interval | P value | ||
|---|---|---|---|---|---|---|
| Age (per decade) | .206 | 15.898 | 1.229 | 1.111 | 1.360 | .000* |
| BMI < 24 kg/m2 | .606 | 23.351 | 1.833 | 1.434 | 2.345 | .000* |
| Surgery in the morning | .497 | 14.915 | 1.644 | 1.278 | 2.117 | .000* |
| Duration of Preparation (min) | .010 | 5.995 | 1.011 | 1.002 | 1.019 | .014* |
| Duration of Surgery> 2 h | .742 | 33.426 | 2.099 | 1.633 | 2.699 | .000* |
| OR temperature (°C) | −.401 | 11.243 | .670 | .530 | .847 | .001* |
| Type of Anesthesia | ||||||
| general anesthesia alone | / | 10.797 | / | / | / | .005 |
| PVB before intubation | −.084 | .309 | .920 | .685 | 1.235 | .579 |
| PVB after intubation | .832 | 8.441 | 2.298 | 1.311 | 4.029 | .004* |
Method = Backward Stepwise (Likelihood Ratio)
BMI body mass index, OR operating room, PVB paravertebral block
*p-value less than 0.05 was considered statistically significant