Table 2.
Proportion of CRT patients receiving CRT-D compared to CRT-P device, stratified by age group
| % CRT-D | |||
|---|---|---|---|
| Age 18-74 (n=157,258) | Age ≥75 (n=100,643) | Difference, % (95% CI) | |
| Overall | 90.8 | 79.3 | 11.6 (8.5 to 12.6) |
| Type of admission | |||
| Elective | 91.2 | 81.7 | 9.3 (8.2 to 10.5) |
| Acute | 90.5 | 76.6 | 13.7 (12.4 to 15.1) |
| Cardiac history | |||
| Ventricular arrhythmia | 96.5 | 92.1 | 4.4 (3.5 to 5.2) |
| Ischemic heart disease | 93.2 | 83.3 | 9.9 (9.0 to 10.9) |
| Atrial fibrillation | 84.6 | 73.3 | 11.3 (10.1 to 12.6) |
| Complete AV block | 72.7 | 65.9 | 6.8 (4.3 to 9.3) |
| Elixhauser comorbidities* | |||
| 0 | 90.3 | 82.0 | 8.3 (6.8 to 9.7) |
| 1-2 | 91.5 | 80.1 | 11.4 (10.3 to 12.6) |
| 3-4 | 90.4 | 77.2 | 13.2 (11.7 to 14.8) |
| ≥5 | 89.1 | 75.5 | 13.6 (11.2 to 16.0) |
| Heart failure comorbidities† | |||
| 0 | 90.2 | 77.8 | 12.4 (10.3 to 14.6) |
| 1-2 | 90.9 | 78.7 | 12.2 (11.0 to 13.5) |
| 3-4 | 90.4 | 80.6 | 10.6 (9.4 to 11.8) |
| ≥5 | 89.2 | 79.9 | 9.3 (6.3 to 12.3) |
*
Measures 28 comorbidities of the Elixhauser index.14
†
Measures seven comorbidities associated with high mortality rate and reduced ICD efficacy among heart failure patients: ischemic heart disease, atrial fibrillation, diabetes, chronic lung disease, chronic kidney disease, peripheral vascular disease, and smoking.15
‡All comparisons between age 18-74 and age ≥75 had p<0.05.