TABLE 1.
Demographic and clinical characteristics of subjects at baseline.
| Characteristic | All Patients in Analysis (N = 767) |
|---|---|
| Age (yr), median (25th–75th percentile) | 57 (49–66) |
| Female, n (%) | 227 (30) |
| Race, n (%) | |
| White | 445 (59) |
| Black | 265 (35) |
| Other | 48 (6) |
| Resting systolic blood pressure (mmHg), median (25th–75th percentile) | 112 (102–128) |
| Resting diastolic blood pressure (mmHg), median (25th–75th percentile) | 70 (62–80) |
| Resting seated HR before exercise test (beats•min−1), median (25th–75th percentile) | 69 (61–77) |
| Weight (kg), median (25th–75th percentile) | 91 (77–108) |
| Body mass index (kg•m−2), median (25th–75th percentile) | 30 (26–36) |
| Left ventricular ejection fraction (%), median (25th–75th percentile) | 25 (21–31) |
| History of diabetes, n (%) | 251 (33) |
| History of stroke, n (%) | 68 (9) |
| History of hypertension, n (%) | 454 (60) |
| Etiology of HF, ischemic, n (%) | 375 (49) |
| New York Heart Association Functional Class, n (%) | |
| II | 557 (73) |
| III/IV | 210 (27) |
| Number of HF hospitalizations in previous 6 months, n (%) | |
| 0 | 568 (74) |
| 1 | 152 (20) |
| 2+ | 42 (5) |
| Peak exercise HR (beats•min−1), median (25th–75th percentile) | 125 (111–140) |
| Peak oxygen uptake (mL•kg−1•min−1), median (25th–75th percentile) | 15.7 (12.5–19.0) |
| Peak RER, median (25th–75th percentile) | 1.13 (1.09–1.19) |
| Peak RPE (Borg, 6-20), median (25th–75th percentile) | 17 (15–19) |
| Prior coronary artery bypass graft surgery, n (%) | 154 (20) |
| Prior percutaneous coronary intervention, n (%) | 161 (21) |
| Prior myocardiac infarction, n (%) | 318 (41) |
| History of atrial fibrillation/flutter, n (%) | 71 (9) |
| History of peripheral vascular occlusive disease, n (%) | 39 (5) |
| History of depression, n (%) | 152 (20) |
| Angiotension-coverting enzyme inhibitor, n (%) | 584 (76) |
| Dose of β-adrenergic blocking agent, carvedilol equivalents (mg•d−1), median (25th–75th percentile) | 40 (25–50) |