Table 1.
Patient demographics
| Derivation cohort (n = 75) | Validation cohort (n = 50) | p-value | |
|---|---|---|---|
| Patient characteristics | |||
| Sex | 0.41 | ||
| Female | 26/75 (35) | 21/50 (42) | |
| Male | 49/75 (65) | 29/50 (58) | |
| Age (years)a | 79 ± 8 (range, 58–94) | 78 ± 8 (range, 60–94) | 0.18 |
| Body mass index (kg/m2)a | 26.4 ± 5.1 (range, 16.8–40.6) | 25.8 ± 4.8 (range, 16.6–43.0) | 0.36 |
| Heart rate during scan acquisition (bpm) | 76 ± 20 (range, 51–171) | 74 ± 16 (range, 48–119) | 0.60 |
| Medical history | |||
| Arterial hypertension | 58/75 (77) | 30/50 (60) | |
| Dyslipidemia | 42/75 (56) | 24/50 (48) | |
| Diabetes | 37/75 (49) | 11/50 (22) | |
| Smoking | 31/75 (41) | 13/50 (26) | |
| Chronic kidney disease | 27/75 (36) | 14/50 (28) | |
| Blood test | |||
| Hematocrit (L/L) | 0.381 ± 0.058 | 0.387 ± 0.043 | 0.52 |
| Radiation dose parameters | |||
| Coronary CT angiography | |||
| CTDIvol (mGy)b | 14.0 (11.1, 20.4) | ||
| DLP (mGy·cm)b | 198 (142, 276) | ||
| Late enhancement scan | |||
| CTDIvol (mGy)b | 7.3 (5.9, 9.0) | 6.8 (5.9, 8.2) | 0.23 |
| DLP (mGy·cm)b | 105 (85, 120) | 94 (80, 116) | 0.15 |
Unless otherwise stated, data are numbers of participants, with percentages in parentheses bpm beats per minute, CTDIvol volume CT dose index, DLP dose length product
aData are means ± SDs
bData are medians and interquartile ranges within parentheses