Selected demographic characteristics and radiation dose exposures according to the type of CTCA scanning procedure, sex and investigation of native coronaries (native) or including coronary artery bypass grafting (CABG)
| Low-dose group | High-dose group | |||||||
| Male | Female | Male | Female | |||||
| Native | CABG | Native | CABG | Native | CABG | Native | CABG | |
| No. patients, n (%) | 321 (86.3) | 51 (13.7) | 186 (94.9) | 10 (5.1) | 89 (91.7) | 8 (8.2) | 83 (98.8) | 1 (1.2) |
| Age (years) | 58.1 (11.1), 59 (52–66) | 64.8 (10.9), 67 (57–72) | 58.8 (10.8), 59 (62–67) | 66.5 (9.5), 66 (63–71) | 59.6 (11.5), 61 (55–67) | 62.8 (9.7), 63 (56–71) | 61.5 (10.9), 61 (54–70) | 62.0 |
| Heart rate (beats per minute) | 58.0 (5.9) | 59.1 (5.7) | 58.1 (6.1) | 57.1 (6.2) | 61.4 (5.7) | 62.3 (6.8) | 62.8 (6.7) | 48.0 |
| BMI (kg/m2) | 26.6 (3.6) | 27.2 (4.5) | 25.3 (4.7) | 25.3 (6.7) | 27.2 (3.7) | 27.6 (3.9) | 24.9 (4.7) | 36.6 |
| Radiation dose without calcium score (mSv) | 3.5 (1.4), 3.2 (2.6–4.3) | 5.9 (1.9), 5.9 (4.6–6.8) | 3.0 (1.3), 2.8 (2.0–3.5) | 5.0 (2.2), 4.6 (3.5–6.3) | 22.3 (2.4), 22.8 (21.4–24.0) | 32.0 (4.4), 32.6 (28.0–35.4) | 22.2 (2.2), 22.6 (21.0–24.0) | 29.8 |
| Radiation dose with calcium score (mSv) | 6.0 (1.8), 5.7 (4.9–6.5) | 8.4 (2.9), 8.4 (4.6–9.7) | 5.2 (1.8), 4.9 (4.3–5.9) | 7.5 (2.4), 7.2 (5.4–9.0) | 25.3 (4.1), 25.2 (23.8–26.4) | 34.4 (4.8), 34.9 (30.3–38.0) | 24.3 (2.1), 24.7 (23.2–25.9) | 32.2 |
Continuous variables are summarised as mean (SD) and/or median (25th–75th percentiles).