Baseline characteristics of patients with a zero CAC and absence or presence of ≥50% stenosis on CTCA
| Variable | CAD <50% (n=737) | CAD ≥50% (n=14) | P value |
| Age (years), mean±SD | 51.73±11.24 | 54.49±8.13 | 0.3619 |
| Male gender, N (%) | 311 (42.2%) | 8 (57.1%) | 0.2624 |
| Hypertension, N (%) | 166 (22.5%) | 5 (35.7%) | 0.2436 |
| Diabetes mellitus, N (%) | 30 (4.1%) | 1 (7.1%) | 0.5670 |
| Obesity, N (%) | 71 (9.6%) | 4 (28.6%) | 0.0192 |
| Smoking history, N (%) | 165 (22.4%) | 8 (57.1%) | 0.0022 |
| Family history, N (%) | 230 (31.2%) | 6 (42.9%) | 0.3523 |
CAC, coronary artery calcification; CAD, coronary artery disease;CTCA, CT coronary angiography; N, number.