Baseline Characteristics of Studied Population
| Characteristic | Overall, n = 1,160 | Nonobstructive CAD, n = 442 (38.1%) | Obstructive CAD, n = 718 (61.9%) | P |
| Age (y) | 64.3 ± 11.5 | 62.2 ± 12 | 65.6 ± 11.1 | <0.0001 |
| Sex | ||||
| Male | 745 (64.2) | 232 (52.5) | 513 (71.5) | <0.0001 |
| Female | 415 (35.8) | 210 (47.5) | 205 (28.5) | <0.0001 |
| Weight (kg) | 88.5 ± 21.9 | 89.4 ± 23.6 | 87.9 ± 20.8 | 0.278 |
| Body mass index (kg/m2) | 30 ± 6.5 | 30.8 ± 7.5 | 29.5 ± 5.7 | <0.01 |
| Diabetes mellitus | 351 (30.3) | 121 (27.4) | 230 (32) | 0.09 |
| Hypertension | 841 (72.5) | 304 (68.8) | 537 (74.8) | <0.05 |
| Dyslipidemia | 780 (67.2) | 281 (63.6) | 499 (69.5) | <0.05 |
| Smoking | 221 (19.1) | 83 (18.8) | 138 (19.2) | 0.85 |
| Stress test type | ||||
| Exercise | 522 (45) | 196 (44.3) | 326 (45.4) | 0.73 |
| Exercise + pharmacologic | 164 (14.1) | 48 (10.9) | 116 (16.2) | <0.05 |
| Pharmacologic | 474 (40.9) | 198 (44.8) | 276 (38.4) | <0.05 |
| Imaging protocol | ||||
| Stress only | 48 (4.1) | 19 (4.3) | 29 (4) | 0.83 |
| Same day stress and rest | 1,073 (92.5) | 403 (91.2) | 670 (93.3) | 0.18 |
| Stress-first | 261 (22.5) | 84 (19.0) | 177 (24.7) | <0.05 |
| Rest-first | 812 (70.0) | 319 (72.2) | 493 (68.7) | <0.05 |
| Two-day stress and rest | 39 (3.4) | 20 (4.5) | 19 (2.7) | 0.09 |
Qualitative data are expressed as numbers followed by percentages in parentheses; continuous data are expressed as mean ± SD.