Table 2. Logistic regression analysis between independent and dependent variables in thoracic surgery.

Variable	Estimated parameter	P	Odds ratio	Confidence interval
Intercept	- 1.2548	0.4899	-	-
Body mass index	- 0.1437	0.0328	0.87	0.76 - 0.99
Smoking	0.0397	0.0029	1.04	1.01 - 1.07
Wheezing	1.8352	0.0209	6.27	1.32 - 29.7
Duration	0.00686	0.0288	1.01	1.00 - 1.01

Individuals classified according to the PORT (Perioperative Respiratory Therapy) scale as being at moderate risk had four times the chance of having postoperative pulmonary complications, in comparison with the low-risk classification. The high-risk classification had 22 times the chance of those at moderate risk.