Table 4.

Univariable and Multivariable Analysis of Factors Associated with Postoperative Morbidity

Variables	Univariate			Multivariate
	OR	95% CI	p Value	OR	95% CI	p Value
Randomization, standard	1.07	0.53-2.17	0.848
Sex, male	2.72	1.31-5.91	0.009	2.89	1.22-7.24	0.019
Age, y	1.03	1.00-1.06	0.077	1.03	1.00-1.07	0.054
Combined liver and colon resection, yes	3.42	1.53-7.84	0.003	2.85	1.16-7.19	0.024
Length of surgery, h	1.32	1.04-1.68	0.024
Estimated blood loss, 100 mL	1.10	1.01-1.21	0.035
Total fluids in OR, mL	1.64	1.20-2.29	0.002	1.50	1.04-2.20	0.034
Urine output in OR per 100 mL	1.03	1.00-1.05	0.035
Fluid bolus for UOP/SBP in PACU	2.88	1.29-6.54	0.010	3.38	1.36-8.79	0.010
BMI				1.00	0.98-1.03	0.925