Findings of CTCA
| Non-anginal | Possible angina | |
| n | 592 | 1027 |
| Coronary calcium score | ||
| Low (<100 AU), | 478 (80.7) | 646 (63.0) |
| Medium (100–400 AU) | 68 (11.5) | 197 (19.2) |
| High (>400 AU) | 46 (7.8) | 183 (17.8) |
| CTCA findings | ||
| Normal | 295 (50.0) | 339 (33.3) |
| Mild (<50%) | 158 (26.8) | 195 (19.1) |
| Moderate (50%–70%) | 81 (13.7) | 182 (17.9) |
| Obstructive | 56 (9.5) | 303 (29.7) |
| Prognostic CHD | 8 (1.4) | 86 (8.4) |
CHD, coronary heart disease; CTCA, CT coronary angiography.