Table 5.

Multivariate logistic regression analysis of risk factors of postoperative pulmonary complications after surgery

Variable	Odd ratio value	Lower CI	Upper CI	P value
Minimally invasive surgery	0.25	0.006	0.180	0.0001
COPD	5.27	1.075	25.8	0.004
Prolonged ventilation time	1.704	1.080	2.690	0.022
Operative time	1.007	1.002	1.012	0.011
Duration of ICU stay	1.300	1.086	1.555	0.004

Hypertension, smoking, cardiopulmonary bypass time, aortic cross clamp time, and hospital duration and blood transfusion were included in the multivariable analysis and were not significant

COPD chronic obstructive pulmonary disease, ICU intensive care unit, CI confidence interval