Table 6. Cox proportional-hazards regression analysis of risk factors for hospital readmission.

Variable	Regression coefficient	Standard error	Wald	P value	Hazard ratio (95% CI)
Age	−0.009	0.008	1.17	0.280	0.99 (0.98–1.01)
Gender	−0.026	0.137	0.04	0.849	0.97 (0.75–1.27)
DRG weight	0.177	0.073	5.85	0.016	1.19 (1.03–1.38)
Low albumin	1.184	0.178	44.16	<0.001	3.27 (2.30–4.63)
Low TLC	0.254	0.159	2.57	0.109	1.29 (0.95–1.76)