Impact of index admission cholecystectomy vs interval cholecystectomy on readmission rate in acute cholangitis: National Readmission Database survey

Table 3 Independent predictors of 30-d readmission for patients with gallstone-related acute cholangitis with same admission cholecystectomy

	Bivariate logistic regression			Multivariate logistic regression
	Adjusted HR	95%CI	P value	Adjusted HR	95%CI	P value
Female	1.01	0.82-1.25	0.88	-	-	-
Age (mean)	1.01	0.99-1.01	0.14	0.99	0.98-1.00	0.34
Charlson comorbidity index
1			Reference
2	1.47	1.06-2.04	< 0.01	1.48	0.94-2.33	0.08
3 or more	2.49	1.89-3.27	< 0.01	1.75	1.04-2.94	0.03
Median income based on the zip code
$1-$38999			Reference
$39000-$47999	0.98	0.74-1.30	0.92	-	-	-
$48000-$62999	0.96	0.72-1.29	0.83	-	-	-
> $63000	0.89	0.65-1.21	0.47	-	-	-
Primary payer
Medicare			Reference
Medicaid	0.76	0.52-1.12	0.17	0.85	0.50-1.46	0.57
Private	0.68	0.52-0.90	< 0.01	0.73	0.48-1.10	0.14
Others	0.51	0.26-1.12	0.05	0.69	0.30-1.60	0.39
Comorbidities
Diabetes mellitus	1.45	1.11-1.91	< 0.01	1.07	0.74-1.55	0.69
Hypertension	1.24	1.01-1.52	0.03	1.2	0.88-1.64	0.24
Chronic kidney disease	1.1	1.04-1.16	< 0.01	0.98	0.90-1.07	0.8
End stage renal disease	3.31	2.03-5.39	< 0.01	2.18	1.25-3.81	< 0.01
Congestive heart failure	2.37	1.85-3.02	< 0.01	1.87	1.31-2.66	< 0.01
Chronic pulmonary obstructive disease	1.5	1.18-1.91	< 0.01	1.09	0.79-1.52	0.57
Hospital teaching status
Non-teaching			Reference
Teaching	0.81	0.65-1.01	0.05	1.11	0.69-1.77	0.65
Hospital bed size
Small			Reference
Medium	0.94	0.66- 1.33	0.72	0.64	0.42-0.99	0.04
Large	1.19	0.87-1.63	0.25	0.92	0.64-1.31	0.64
Hospital location
Rural			Reference
Urban	0.76	0.58-0.99	0.04	0.61	0.37-1.02	0.06
Outcomes
Intensive care unit	1.98	1.38-2.83	< 0.01	1.29	0.56-2.96	0.54
Acute respiratory failure	2.45	1.46-4.11	< 0.01	1.51	0.85-2.7	0.15
Septic shock	1.23	0.49-3.09	< 0.64	-	-	-

CI: Confidence interval; HR: Hazard ratio.