Table 6.

Multivariate logistic regression analysis of risk factors influencing postoperative pneumonia in the patients underwent craniotomy for brain tumor.

Variables	B	SE	Wald	P value	Odds ratio (95% CI)
Coronary heart disease	2.374	0.990	5.747	0.017	10.742 (1.542–74.835)
Operation time	0.005	0.002	4.222	0.040	1.005 (1.000–1.010)
Pulmonary imaging abnormalities	2.989	1.048	8.132	0.004	19.862 (2.546–154.936)
Epilepsy	2.125	0.745	8.127	0.004	8.371 (1.942–36.075)

Adjusted for age, diabetes mellitus, postoperative albumin, operative time, intraoperative blood loss, renal failure.

B regression coefficient, SE standard errors of regression coefficient.