Table 3.

Logistic regression analysis evaluating the primary outcome (death) adjusted for variables significantly associated with a higher risk of mortality on admission.

Baseline exposure variable	Mortality rate (95% CI)	Adjusted odds ratio (95% CI)	P
Age, years
<50	6.4 (4.8−8.4)	–	–
50–65	14.7 (11.5−18.3)	1.8 (1.2−2.8)	0.003
>65	31.3 (26.9−36.0)	5.4 (3.7−8.0)	<.0001
Gender
Male	17.0 (14.6−19.5)	1.5 (1.1−2.1)	0.006
Female	12.6 (10.2−15.4)	–
Diabetes mellitus
Yes	27.3 (22.2−32.3)	1.6 (1.1−2.2)	0.007
No	12.5 (10.8−14.4)	–
Body mass index >30
Yes	20.9 (16.3−26.2)	1.4 (1.02−2.1)	0.04
No	13.9 (12.0−15.8)
Pneumonia
Yes	21.6 (18.9−24.5)	2.3 (1.6−3.2)	<.0001
No	7.6 (5.8−9.8)
Abnormal liver tests
Yes	18.7 (15.9−21.7)	1.4 (1.06−1.9)	0.02
No	12.2 (10.1−14.6)

Note: Calibration (P = 0.07, Hosmer-Lemeshow test). ROC curve 0.76 (CI 0.74−0.78).