Table 3.

Cox proportional hazards models for hospital mortality

	No frailty		Frailty
Variables	HR (95% CI)	p-value	HR (95% CI)	p-value
Gender (male)	1.268 (1.13; 1.42)	<0.001	1.272 (1.14; 1.43)	<0.001
Age (years)	1.013 (1.01; 1.02)	<0.001	1.013 (1.01; 1.02)	<0.001
Type of admission (urgent)	1.699 (1.43; 2.02)	<0.001	1.592 (1.33; 1.91)	<0.001
Type of DRG (surgical)	0.569 (0.47; 0.69)	<0.001	0.560 (0.46; 0.68)	<0.001
Number of diagnoses	1.018 (1.00; 1.03)	0.012	1.020 (1.01; 1.04)	0.012
Number of procedures	0.997 (0.98; 1.01)	0.580	0.994 (0.98;1.01)	0.360
Pneumonia	1.428 (1.29; 1.59)	<0.001	1.431 (1.29; 1.59)	<0.001
Tuberculosis	0.779 (0.69; 0.88)	<0.001	0.783 (0.69; 0.88)	<0.001
Hepatitis C	1.013 (0.90; 1.14)	0.820	1.011 (0.90; 1.14)	0.850
Hospital size (>500 beds)	1.118 (1.01; 1.24)	0.033	1.145 (0.93; 1.41)	0.210
Live in catchment area	1.032 (0.92; 1.15)	0.590	1.011 (0.90; 1.14)	0.850
Central hospital	0.798 (0.72; 0.89)	<0.001	0.808 (0.68; 0.97)	0.002
Frailty variance	0.032			0.002