Table 1.
Before and after matching sample characteristics
| |
Sub-sample 1 |
Sub-sample 2 |
||||
|---|---|---|---|---|---|---|
| |
Before matching |
After-matching |
Before matching |
After-matching |
||
| Mean case (sd) | Mean control (sd) | Standardized difference | Mean case (sd) | Mean control (sd) | Standardized difference | |
|
Covariates |
||||||
| Age |
65.90 (12.02) |
70.40 (10.09) |
−0.01 |
66.30 (10.58) |
70.12 (9.83) |
−0.01 |
| Gender (Female) |
0.15 (0.35) |
0.16 (90.38) |
0 |
0.14 (0.35) |
0.15 (0.35) |
0 |
| Charlston Index = 0 |
|
|
|
0.53 (0.49) |
0.54 (0.50) |
0 |
| Charlston Index = 1 |
|
|
|
0.24 (0.43) |
0.30 (0.46) |
0 |
| Charlston Index = 2 |
|
|
|
0.14 (0.35) |
0.21 (0.41) |
0 |
|
Outcomes |
||||||
| LOS |
9.15 (11.9) |
9.05 (9.72) |
0.152 |
8.86 (11.24) |
9.07 (9.40) |
0.154 |
| Re-hospitalization rate |
2.11 (3.51) |
1.54 (2.52) |
0.202 |
2.14(3.60) |
1.57(2.42) |
0.227 |
| Mortality |
0.29 (0.45) |
0.47 (0.50) |
−0.109 |
0.30 (0.46) |
0.46(0.50) |
−0.067 |
| Expenditure for index hospitalisation (€) |
15020.92 (5780.23) |
4259.72 (5780.95) |
1.44 |
14815.56 (7343.40) |
4307.13(6443.55) |
1.347 |
| Total hospital expenditure during follow up (€) |
24944.31 (19558.93) |
10881.34 (13230.06) |
0.156 |
24829.44 (19863.8) |
11269.01 (14044.27) |
0.618 |
| Patients | 1050 | 11976 | 905 | 5962 | ||
Legend: Sub-sample 1: ICD and non ICD patients with the same primary diagnosis (+ other controls); Sub-sample 2: ICD and non ICD patients with the same primary diagnosis and Charlson index (+ other controls; Case: Patients with ICD; Controls: Patients without ICD; Standardized difference = After-matching standardized differences between case and control groups; LOS = Length of Stay in day.