Table 4. Preoperative clinical conditions associated with the development of pulmonary events during the intraoperative and postoperative periods, according to logistic regression.

Variable	Coefficient	Standard error	Z	p	Odds ratio (OR)	95% CI (confidence interval)
Constant	-3.35144	0.248305	-13.50	0.000
Sex (female)	0.437314	0.129951	3.37	0.001	1.55	[1.20; 2.00]
Age (in decades)
[40-60]	0.299963	0.160255	1.87	0.061	1.35	[0.99; 1.85]
[60-70]	0.297074	0.196757	1.51	0.131	1.35	[0.92; 1.98]
≥ 70	0.501835	0.197508	2.54	0.011	1.65	[1.12; 2.43]
Smoking habit	0.544807	0.160062	3.40	0.001	1.72	[1.26; 2.36]
COPD	0.626441	0.266214	2.35	0.019	1.87	[1.11; 3.15]

COPD = chronic obstructive pulmonary disease.