Table 2.

Multivariable Logistic Regression of Predictors for Postoperative Pneumonia

Variable	OR	95% CI	P value
Age, years	1.03	0.99, 1.07	0.126
BMI, Kg/m2	0.76	0.70, 0.84	<0.001
Serum albumin, g/dL	0.86	0.79, 0.93	<0.001
C-reactive protein, mg/L	1.01	1.00, 1.02	0.011
ASA classification
1	Ref.
2	0.59	0.16, 2.16	0.423
3	1.46	0.39, 5.44	0.575
4	0.94	0.20, 4.53	0.941
Functional status
Independent	Ref.
Dependent	2.94	1.69, 5.10	<0.001
Time to surgery
Less than 48 h	Ref.
More than 48 h	4.56	2.64, 7.88	<0.001
COPD
No	Ref.
Yes	0.76	0.37, 1.58	0.469

Note: Data are presented as the odds ratio with the confidence interval in parenthesis.

Abbreviations: BMI, body mass index; COPD, chronic obstructive pulmonary disease; OR, odds ratio; CI, confidence interval.