Table 2.

Demographics and Elixhauser Comorbidities in Overall Cohort, Cholecystectomy, and No Cholecystectomy Groups

Variables	Overall cohort, n=29,818	Cholecystectomy, n=22,367	No cholecystectomy, n=7,451	p Value
Demographics
Age, y (mean)	77.7±7.3	77.0±6.9	79.8±7.9	<0.0001
Female, %	58	57	61	<0.0001
White, %	89	89	87	<0.0001
African American, %	6	6	7
Other race, %	5	5	5
Admission type, %
Emergency admission	64	63	66	<0.0001
Urgent admission	36	37	34
Weekend admission	24	24	25	0.14
Diagnosis, %
Acute cholecystitis without CBD stones	80	86	63	<0.0001
Acute cholecystitis with CBD stones	20	14	37
Teaching status, %
Major teaching hospital	16	15	19	<0.0001
Minor teaching hospital	22	23	20
Non-teaching hospital	62	62	61
Other procedures, cholecystostomy tube, %	0.5	0.05	1.7	<0.0001
Comorbidities, %
Congestive heart failure	15	12	22	<0.0001
Valvular disease	7	6	9	<0.0001
Peripheral vascular disease	11	10	15	<0.0001
Hypertension	52	52	54	0.0004
Other neurological disorders than paralysis	6	5	8	<0.0001
Chronic pulmonary disease	16	15	20	<0.0001
Diabetes mellitus	22	21	23	<0.0001
Diabetes mellitus w/ complications	6	6	7	0.0011
Hypothyroidism	10	9	11	<0.0001
Renal failure	3	2	4	<0.0001
Solid tumor w/out mets	8	8	9	0.09
Depression	5	4	6	<0.0001

Only comorbidities with >3 % prevalence in cohort shown.

CBD, common bile duct.