Appendix Table.
Comparison of patients who were (‘“With resting ECGs”) and were not (“Without resting ECGs”) included in the study.
| Characteristic | Value | |||
|---|---|---|---|---|
| With resting ECGs (n=18,964) |
Without resting ECGs (n=14,256) |
|||
| Demographic and clinical | ||||
| Age, y | 52 | (44, 60) | 54 | (45, 62) |
| Male, n (%) | 12,478 | (66) | 8,004 | (56) |
| Current or recent smoking, n (%) | 3,251 | (17) | 2,426 | (17) |
| Non-insulin treated diabetes mellitus, n (%) | 921 | (5) | 899 | (6) |
| Insulin-treated diabetes mellitus, n (%) | 347 | (2) | 318 | (2) |
| Hypertension, n (%) | 8,491 | (45) | 7,659 | (54) |
| Typical angina, n (%) | 157 | (1) | 201 | (1) |
| Exercise | ||||
| Predicted Metabolic Equivalents Achieved *, % | 103 | (90, 117) | 102 | (88, 116) |
| ST-segment depression (10th, 90th percentiles), mm | 0 | (0, 1) | 0 | (0, 1) |
| Test angina, n (%) | 256 | (1) | 230 | (2) |
| Abnormal heart rate recovery, n (%) | 3,194 | (17) | 2,441 | (17) |
| Frequent ventricular ectopy in recovery, n (%) | 687 | (4) | 515 | (4) |
Continues variables are medians (25th to 75th percentiles), unless otherwise indicated.
*
Predicted metabolic equivalents (METS) achieved was calculated with previously validated models17: for men -- observed METS / (18 − [0.15 × age]) × 100, and for women – observed METS / (14.7 − [0.13 × age]) × 100. See text for details.