Table 4.

Multivariable logistic regression for odds of a major (grade ≥ 3) postoperative complication

Variable	OR (95% CI)	P
ASA (3 vs. 2)	2.82 (0.84–9.541)	0.095
BMI	1.00 (0.97–1.03)	0.9
History of asthma	4.12 (1.99–8.53)	0.0001
Estimated blood loss, L	1.75 (1.11–2.76)	0.015
RBCs per 100 mL	1.19 (1.09–1.30)	0.0001
Total fluid, per L increase	1.19 (0.92–1.23)	0.4
Preoperative chemoradiation	0.36 (0.24–0.55)	<0.0001
Surgical duration, per h	1.02 (0.88–1.19)	0.8

ASA, American Society of Anesthesiologists physical status classification; BMI, body mass index; CI, confidence interval; OR, odds ratio; RBCs, red blood cells transfused.