Table 2.
Characteristics in men and women in relation to CCTA and follow-up
| Women (n=1920) | Men (n=1621) | p Value | |
|---|---|---|---|
| CCTA | |||
| Volume of contrast (mL) | 60 (60–80) | 80 (60–90) | <0.001 |
| Radiation dose (mSv) | 2.6 (1.2–6.4) | 3.3 (1.6–8.3) | <0.001 |
| CAC score (Hounsfield units) | 0 (0–351) | 33 (0–701) | <0.001 |
| CAC score 0 | 57.0 | 37.6 | |
| CAC score 1–99 | 21.8 | 26.5 | |
| CAC score 100–399 | 11.8 | 17.1 | |
| CAC score 400–999 | 5.6 | 12.4 | |
| CAC score ≥1000 | 3.7 | 6.5 | <0.001 |
| Consequence of CCTA | |||
| Referred for coronary angiography | 15.5% | 24.4% | <0.001 |
| Referred for perfusion scan | 4.0% | 5.3% | 0.07 |
| Proportion having coronary angiography or coronary revascularisation during follow-up | |||
| Coronary angiography | 18.3% | 28.5% | <0.001 |
| Percutaneous coronary revascularisation | 4.0% | 8.9% | <0.001 |
| Coronary artery bypass surgery | 1.3% | 3.2% | <0.001 |
Values are medians with 10th and 90th centiles in parentheses for continuous variables and percentages for categorical variables. The test used for categorical variables was Pearson's χ2 test. The test used for continuous variables was the Mann–Whitney test. Number of missing values: volume of contrast, 171; radiation dose, 87; CAC score, 356; consequence of CCTA, 101.
CAC, coronary artery calcium; CCTA, coronary CT angiography.