Assessing the outcomes of implantable cardioverter defibrillator treatment in a real world setting: results from hospital record data

Table 2 Average treatment effect on patients with ICDs (adjusted t -test)

	Average treatment effect on ICD patients	95% confidence interval
		Lower	Upper
*Matching 1*
Mortality 1 year	−0.106	−0.131	−0.082
Mortality 2 years	−0.083	−0.114	−0.053
Mortality 3 years	−0.084	−0.120	−0.049
Life years gained	1.190	0.657	1.723
LOS	0.112	−0.853	1.078
Re-hospitalization	0.533	0.325	0.742
Expenditure for index hospitalization (€)	9459.64	8793.73	10,125.54
Total hospital expenditure during follow up (€)	1707.29	539.25	2875.33
*Matching 2*
Mortality 1 year	−0.088	−0.114	−0.062
Mortality 2 years	−0.065	−0.097	−0.032
Mortality 3 years	−0.060	−0.099	−0.021
Life years gained	0.762	0.202	1.323
LOS	0.089	−0.648	1.112
Re-hospitalization	0.591	0.360	0.818
Expenditure for index hospitalization (€)	9103.54	8543.86	9981.10
Total hospital expenditure during follow up (€)	1747.94	379.70	2997.16

Legend: Matching 1: exact matching on subsample 1; Matching 2: exact matching on subsample 2; Average treatment effect: average treatment effect on patients with ICDs (mean difference between treatment and matched controls, adjusted for number of matches); Mortality 3 years: patients hospitalized in 2007 excluded.

ISSN: 1472-6963