Table 1.
Patient characteristics
| Characteristic - no. (%) unless noted | Derivation cohort (n = 5486) | Validation cohort (n = 910) |
| Age (mean ± SD) | 59.1 ± 15.8 | 58.6 ± 15.2 |
| 18-29 | 265 (4.8) | 30 (3.3) |
| 30-39 | 408 (7.4) | 91 (10.0) |
| 40-49 | 708 (12.9) | 105 (11.5) |
| 50-59 | 1295 (23.6) | 224 (24.6) |
| 60-69 | 1358 (24.8) | 242 (26.6) |
| 70 + | 1452 (26.5) | 218 (24.0) |
| Male sex | 2869 (52.3) | 448 (49.2) |
| Body mass index | ||
| mean ± SD | 28.0 ± 6.6 | 28.5 ± 6.5 |
| Median (range) | 26.9 (12.9-75.2) | 27.5 (15.8-66.1) |
| Left ventricular mass by echocardiogram | ||
| mean ± SD | 167.2 ± 62.1 | 173.3 ± 64.8 |
| Median (intraquartile range) | 155.4 (123.3-200.4) | 163.0 (124.1-205.0) |
| Left ventricular hypertrophy present by echocardiogram | 333 (6.1) | 80 (8.6) |
| Time between echocardiogram and electrocardiogram in days (mean, intraquartile range) | 6.7 (0-13) | 5.9 (0-11) |