Characteristics of Study Population
| Characteristic | Derivation group | Validation group | Overall | P value |
|---|---|---|---|---|
| Males* (%) | 41/50 (82) | 30/40 (75) | 71/90 (79) | NS |
| Age (y) | 53.3 ± 11.4 | 52.5 ± 10.3 | 52.9 ± 10.9 | NS |
| Resting HR | 62.7 ± 8.2 | 61.3 ± 8.2 | 62.1 ± 8.2 | NS |
| Resting SBP | 126.0 ± 16.1 | 130.4 ± 17.2 | 127.9 ± 16.6 | NS |
| Resting DBP | 77.0 ± 8.3 | 76.8 ± 8.1 | 76.9 ± 8.1 | NS |
| MPHR (%) | 95.6 ± 5.9 | 94.1 ± 6.1 | 94.9 ± 6.0 | NS |
| (+) Clinical response | 0/50 | 2/40 | 2/90 | NS |
| (+) ECG response | 2/50 | 2/40 | 4/90 | NS |
↵* Values in parentheses are percentages.
NS = not significant; SBP = systolic blood pressure (mm Hg); DBP = diastolic blood pressure (mm Hg).