Table 4.

Multivariate Cox Proportional Hazards Model: Factors Predicting 2-year mortality

Factor (reference group)	Hazard Ratio	95% Confidence Interval
Cholecystectomy during initial hospitalization (no cholecystectomy)	1.56	1.47 – 1.65
Age (5 year increments)	1.39	1.36 – 1.41
Male (female)	1.19	1.23 – 1.26
CBD stones (no stones)	0.85	0.80 – 0.91
Congestive heart failure (no)	1.79	1.67 – 1.91
Valvular disease (no)	1.15	1.05 – 1.25
Paralysis (no)	1.17	1.00 – 1.37
Other neurologic disease (no)	1.51	1.38 – 1.65
Peripheral vascular disease (no)	1.23	1.15 – 1.33
Chronic pulmonary disease (no)	1.41	1.32 – 1.51
Depression (no)	1.18	1.06 – 1.31
Hypertension (no)	0.91	0.86 – 0.96
Electrolyte abnormalities	1.29	1.20 – 1.39
Deficiency anemia	1.22	1.14 – 1.31
Coagulopathy	1.16	1.03 – 1.31
Weight loss	1.24	1.07 – 1.43
Diabetes mellitus (no)	1.34	1.26 – 1.43
Metastatic Cancer (no)	2.90	2.46 – 3.40
Renal Failure (no)	1.74	1.55 – 1.96
Liver disease (no)	1.91	1.55 – 2.36