Table 1.
Patient characteristics at implantation.
| Characteristic | All patients (n = 5,853) |
Single-brand group (n = 5,615) |
Mixed-brand group (n = 238) |
P-value |
|---|---|---|---|---|
| Age (years) | 72 (64–79) | 70 (65–79) | 73 (63–81) | 0.68 |
| Female | 1424 (24.4%) | 1351 (24.2%) | 73 (30.7%) | 0.027 |
| LVEF (%) | 33 (30–45) | 33 (30–45) | 35 (28–55) | 0.087 |
| Cardiomyopathy | 0.006 | |||
| Ischemic | 1996 (39.0%) | 1928 (39.3%) | 68 (31.5%) | |
|
Non-ischemic None |
1849 (36.1%) 1274 (24.9%) |
1749 (35.7%) 1226 (25.0%) |
100 (46.3%) 48 (22.2%) |
|
| Devices | < 0.001 | |||
| Single-chamber PM | 226 (3.9%) | 215 (3.8%) | 11 (4.6%) | |
| Dual-chamber PM | 1273 (21.7%) | 1216 (21.7%) | 57 (23.8%) | |
| Single-chamber ICD | 793 (13.5%) | 783 (13.9%) | 10 (4.2%) | |
| Dual-chamber ICD | 1416 (24.2%) | 1216 (21.7%) | 17 (7.1%) | |
| CRT-P | 213 (3.6%) | 193 (3.4%) | 20 (8.3%) | |
| CRT-D | 1932 (33.0%) | 1807 (32.2%) | 125 (52.1%) | |
| Comorbidities | ||||
| Hypertension | 3336 (63.8%) | 3189 (63.7%) | 147 (67.4%) | 0.29 |
| Diabetes | 1353(26.6%) | 1293 (26.5%) | 60 (27.6%) | 0.77 |
| Stroke/TIA | 196 (3.9%) | 190 (3.9%) | 6 (2.8%) | 0.48 |
| Renal insufficiency | 665 (13.1%) | 626 (12.9%) | 39 (17.9%) | 0.043 |
| History of AF | 1571 (30.5%) | 1485 (30.1%) | 86 (38.2%) | 0.012 |
| History of VF | 260 (5.1%) | 255 (5.3%) | 5 (2.3%) | 0.069 |
| History of VT | 497 (9.8%) | 485 (10.0%) | 12 (5.5%) | 0.036 |
Data are median (interquartile range) or number (% of available data).
AF, atrial fibrillation; CRT-D, cardiac resynchronization therapy defibrillator; CRT-P, cardiac resynchronization therapy pacemaker; ICD, implantable cardioverter-defibrillator; LVEF, left ventricular ejection fraction; PM, pacemaker; TIA, transient ischemic attack; VF, ventricular fibrillation; VT, ventricular tachycardia.
Significance values are bold.