Table 2.
Coronary artery calcium characteristics as detected by cardiac CT and stratified by major coronary heart disease events
| All n=1268 | No major CHD n=1226 | Major CHD n=42 | P value | |
|---|---|---|---|---|
| Total CAC score (median, 25th–75th percentile) | 71 (15, 256) | 68 (14, 233) | 484 (158, 730) | <0.001 |
| CAC score categories (%) | <0.001 | |||
| 1–100 | 721 (56.9) | 713 (58.2) | 8 (19.1) | |
| 101–300 | 269 (21.2) | 260 (21.2) | 9 (21.4) | |
| >300 | 278 (21.9) | 253 (20.6) | 25 (59.5) | |
| Number of segments with CAC (median, 25th–75th percentile) | 2 (1, 5) | 2 (1, 5) | 4 (6, 8) | <0.001 |
| Number of coronary segments with CAC (%) | <0.001 | |||
| 1–2 segments | 650 (51.3) | 647 (52.8) | 3 (7.1) | |
| 3–4 segments | 279 (22.0) | 269 (21.9) | 10 (23.8) | |
| 5–8 segments | 264 (20.8) | 242 (19.7) | 22 (52.4) | |
| >8 segments | 75 (5.9) | 68 (5.5) | 7 (16.7) | |
| Number of coronary arteries with CAC (%) | <0.001 | |||
| 1 vessel | 546 (43.1) | 545 (44.5) | 1 (2.4) | |
| 2 vessel | 294 (23.2) | 284 (23.2) | 10 (23.8) | |
| 3 vessel | 239 (18.9) | 225 (18.4) | 14 (33.3) | |
| 4 vessel | 189 (14.9) | 172 (14.0) | 17 (40.5) | |
| Coronary dominance (%) | ||||
| Right | 1177 (92.8) | 1136 (92.7) | 41 (97.6) | 0.71 |
| Left | 49 (3.9) | 48 (3.9) | 1 (2.4) | |
| Co-dominant | 42 (3.3) | 42 (3.4) | 0 (0) | |
| Proximal dominant coronary artery CAC (%) | <0.001 | |||
| Yes | 442 (34.9) | 411 (33.5) | 31 (73.8) | |
| No | 826 (65.1) | 815 (66.5) | 11 (26.2) | |
| Right proximal segments CAC (%) | ||||
| Yes | 620 (48.9) | 585 (47.7) | 35 (83.3) | <0.001 |
| No | 648 (51.1) | 641 (52.3) | 7 (16.7) | |
| Left proximal segments CAC (%) | ||||
| Yes | 1079 (85.1) | 1038 (84.7) | 41 (97.6) | 0.02 |
| No | 189 (14.9) | 188 (15.3) | 1 (2.4) | |