BMC Health Services Research

Table 1 Characteristics of IQI 11 abdominal aortic aneurysm repair mortality rate and IQI 09 pancreatic resection mortality rate

From: Improving hospital quality risk-adjustment models using interactions identified by hierarchical group lasso regularisation

AHRQ QI	Event	Popul.(N)	Mean Age	Male	Mean LOS	Admit Type
	rate(%)		(yrs)	(%)	±Std.(Days)	(%)
IQI 11
OPEN RUPT	38.73	1,322	72.4±9.8	75.0	12.4±14.5	Em: 69.3
						U:16.6
						El:5.0
						O:9.1
ENDO RUPT	20.94	2,082	74.2±10.0	78.3	8.3±10.8	Em:66.9
						U:18.3
						El:8.2
						O:6.7
OPEN UNRUP	5.73	4,154	69.9±9.0	71.4	9.9±9.0	Em:14.8
						U:7.8
						El:75.1
						O:2.3
ENDO UNRUP	0.84	29,611	74.3±8.7	80.4	2.9±4.4	Em: 10.9
						U:6.8
						El:81.0
						O:1.3
Composite	3.86	37,169	73.7±9.0	79.1	4.27±6.8	Em: 16.6
						U: 7.9
						El: 73.6
						O: 2.0
IQI 09
WITH	2.11	12,177	66.5±11	52.0	11.2±9.6	Em:7.6
CANCER						U: 5.2
						El:85.7
						O: 1.6
WITHOUT	2.49	10,017	58.2±15.2	47.8	10.9±13.1	Em: 9.7
CANCER						U: 5.9
						El:80.4
						O: 4.1
Composite	2.28	22,194	62.8±13.8	50.1	11.1±11.3	Em: 8.5
						U: 5.5
						El: 83.3
						O: 2.7
PSI 14
OPEN	0.24	530,751	59.7±16	45.6	8.7±12.9	NA
NON-OPEN	0.01	438,531	55.0±18	41.2	5.2± 8.5	NA
Composite	0.13	969,282	57.6±17	43.6	7.1±11.3	NA

Abbreviations: RUPT Ruptured, UNRUP Unruptured, Em Emergency, U Urgent, El Elective, O Other admission types, Composite non-stratified model

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