Table 1.
Baseline Characteristics
| Total (n = 105) | With Implantable Cardioverter-defibrillator (n = 67) | Without Implantable Cardioverter-defibrillator (n = 38) | P Value | |
|---|---|---|---|---|
| Age (y) | 58 (13) | 58 (12) | 58 (15) | .889 |
| Male (%) | 70 | 78 | 58 | .045 |
| New York Heart Association Class (%) | .696 | |||
| I | 18 | 15 | 24 | |
| II | 42 | 42 | 41 | |
| III | 37 | 39 | 32 | |
| IV | 3 | 3 | 3 | |
| Duration >5 y (%) | 52 | 55 | 47 | .542 |
| Ischemic etiology (%) | 35 | 40 | 24 | .133 |
| Left ventricular ejection fraction (%) | 21 (7) | 20 (6) | 23 (7) | .017 |
| Peak VO2 (mL/kg/min) | 14.8 (4.7) | 14.5 (4.4) | 16.1 (5.8) | .368 |
| Serum sodium (mEq/L) | 139 (3) | 138 (3) | 139 (3) | .572 |
| Blood urea nitrogen (mg/dL) | 34 (21) | 35 (22) | 33 (19) | .688 |
| Serum creatinine (mg/dL) | 1.6 (1.0) | 1.4 (0.5) | 1.8 (1.6) | .270 |
| B-type natriuretic peptide (pg/mL) | 809 (1303) | 622 (954) | 1043 (1646) | .374 |
| Time tradeoff utility | 0.81 (0.32) | 0.83 (0.31) | 0.78 (0.34) | .472 |
P values derived by t-test for continuous variables and Fisher’s exact test of categorical variables.
Continuous variables presented as mean ± SD.