Table 5. Multivariate logistic regression for pneumonia.

	Pneumonia			Adjusted for patient age (1-yearincrease)
	OR	95%CI	p-value	OR	95%CI	p-value
Tobacco	2.099	0.601–7.718	0.248	1.033	0.960–1.114	0.368
Alcohol	1.775	0.505–6.366	0.368	1.033	0.960–1.114	0.368
Neoadjuvant therapy	0.503	0.178–1.380	0.185	1.033	0.970–1.107	0.336
Neoadjuvant therapy complete response	2.278	0.346–16.31	0.392	1.066	0.941–1.234	0.342
Clinical T staging	1.002	0.486–2.101	1.000	1.033	0.970–1.108	0.337
Clinical N staging	0.914	0.512–1.553	0.746	1.033	0.970–1.108	0.337
Number of lymph nodes dissected	0.933	0.841–1.021	0.153	1.070	0.998–1.160	0.073
Surgery duration (1-minute increase)	1.026	1.007–1.054	0.022	1.148	1.011–1.360	0.062
Surgery year (1-year increase)	0.612	0.372–1.920	0.029	1.249	1.069–1.529	0.014

OR: odds ratio; CI: confidence interval