Table 3.

Multivariate logistic regression analysis: independent risk factors of postoperative hypothermia after brachial plexus block

Variable	Odds ratio	95% CI	P
Baseline core temperature	0.355	0.185-0.682	0.002
Alcohol abuse	2.658	1.105-6.398	0.029
Arthroscopic shoulder surgery	2.007	1.428-2.820	< 0.001
Fentanyl	1.486	1.059-2.087	0.022
Midazolam + dexmedetomidine	1.816	1.268-2.599	0.001
Fluid administered	1.001	1.000-1.002	0.035
Duration of surgery	1.010	1.004-1.017	0.002

CI, confidence interval.