Table 7. Multivariate logistic regression analysis of the risk factors of pneumonia among the studied cardiac patients.

CI, confidence interval; ESR, erythrocyte sedimentation rate; CRP, C-reactive protein; ICU, intensive care unit

Variable	B	Wald	P-value	Odds ratio (95% CI)
Gender	0.19	0.16	0.686	0.82 (0.32-2.11)
Autoimmune diseases	1.46	1.89	0.169	4.31 (0.53-34.69)
Exposure to immunosuppressives	0.99	0.176	0.184	2.69 (0.62-11.62)
Glucocorticoid use	0.17	0.1	0.752	0.84 (0.29-2.43)
Initial chest X-ray	0.74	1.02	0.312	0.47 (0.11-2.01)
Second chest X-ray during hospitalization: abnormal "consolidation"	2.13	5.71	0.017	8.44 (1.46-48.63)
Nasogastric tube use	3.42	1.09	0.002	30.78 (3.57-65.25)
Pulmonary diseases	1.42	7.08	0.008	4.15 (1.45-11.87)
Leukocyte (WBC) count	1.01	3.52	0.06	0.36 (0.12-1.04)
ESR	1.76	4.92	0.026	0.17 (0.03-0.81)
CRP	0.44	0.18	0.667	0.15 (0.2-3.71)
Respiratory culture	0.02	0.13	0.76	0.1 (0.02-1.1)
Number of hospitalization within the last six months	2.07	10.94	0.001	7.98 (2.33-27.53)
Number of ICU admission within the last six months	0.25	0.26	0.61	1.29 (0.47-3.5)