Table 2. Incidence Rates of All-Cause Mortality and SCD in the ICD and Control Groups in Each EF Category.
| EF Group | No. | 100 Follow-up Person-years | Incidence Rate Mortality per 100 Person-year Follow-up (95% CI) | |
|---|---|---|---|---|
| Patients | Deaths | |||
| All-Cause Mortality | ||||
| EF ≤35% | ||||
| ICD | 438 | 89 | 11.5 | 7.7 (6.3-9.5) |
| Placebo | 464 | 125 | 11.7 | 10.7 (8.9-12.7) |
| EF >35% | ||||
| ICD | 186 | 12 | 4.6 | 2.6 (1.5-4.6) |
| Placebo | 185 | 22 | 4.9 | 4.5 (3.0-6.8) |
| SCD | ||||
| EF ≤35% | ||||
| ICD | 438 | 14 | 11.5 | 1.2 (0.7-2.0) |
| Placebo | 464 | 46 | 11.7 | 3.9 (2.9-5.2) |
| EF >35% | ||||
| ICD | 186 | 3 | 4.6 | 0.6 (0.2-2.0) |
| Placebo | 185 | 4 | 4.9 | 0.8 (0.3-2.2) |
Abbreviations: EF, ejection fraction; ICD, implantable cardioverter defibrillator; SCD, sudden cardiac death.