Table 1.
Descriptive statistics for quantitative data measured in coronary CT angiograms
| n | Mean | 95% CI | SD | Median | IQR | Range | |
|---|---|---|---|---|---|---|---|
| Spatial position of the great vessels: delta angle (Fig. 3 ) | |||||||
| Delta angle | 50 | 16.1 | 11.7 to 20.4 | 15.2 | 17 | 10 to 25 | − 36 to 48 |
| Localization of the main coronary arteries in the aortic sinus: gamma angle (Fig. 4 ) | |||||||
| LCA | 41 | − 24.2 | − 38.2 to − 10.3 | 44.1 | − 36 | − 46 to − 27 | − 72 to 128 |
| LCA+ (from the LCS) | 36 | − 39.3 | − 44 to − 34.6 | 13.8 | − 39.5 | − 48 to − 30.5 | − 72 to − 15 |
| RCA | 42 | 46.4 | 37.9 to 54.9 | 27.4 | 48 | 40 to 60 | − 55 to 124 |
| RCA+ (from the RCS) | 39 | 52.1 | 46.3 to 57.8 | 17.7 | 49 | 42 to 60 | 9 to 124 |
| LAD | 6 | − 16.7 | − 28.2 to − 5.11 | 11 | − 17.5 | − 21 to − 5 | − 34 to − 5 |
| RCA + Cx | 5 | 83.2 | 71.9 to 94.5 | 9.1 | 81 | 76 to 87 | 75 to 97 |
| The branching angle of the coronary arteries along the short axis: alpha angle (Fig. 5 ) | |||||||
| LCS | 46 | 48.3 | 40.4 to 56.3 | 26.9 | 45 | 26 to 66 | 12 to 129 |
| LCA+ (from the LCS) | 36 | 47.1 | 37.9 to 56.3 | 27 | 43 | 26 to 66 | 12 to 129 |
| RCS | 52 | 79.2 | 70.4 to 88 | 31.7 | 84.5 | 57 to 106 | 12 to 136 |
| RCA+ (from the RCS) | 39 | 85 | 75.4 to 94.6 | 29.7 | 88 | 63 to 108 | 14 to 135 |
| LAD | 6 | 43.5 | 17.1 to 69.9 | 25.2 | 37.5 | 25 to 57 | 18 to 86 |
| RCA + Cx | 5 | 71.4 | 51.4 to 91.4 | 16.1 | 64 | 60 to 81 | 57 to 95 |
| The branching angle of the coronary arteries along the long axis: beta angle (Fig. 6 ) | |||||||
| LCS | 46 | 56.4 | 46.8 to 65.9 | 32.2 | 49 | 31 to 86 | 10 to 134 |
| LCA+ (from the LCS) | 36 | 55 | 44.2 to 65.8 | 31.8 | 46.5 | 31.5 to 84.5 | 10 to 134 |
| RCS | 52 | 85.2 | 75.8 to 94.5 | 33.6 | 94 | 72.5 to 103.5 | 3 to 157 |
| RCA+ (from the RCS) | 39 | 92.1 | 83.4 to 100.8 | 26.7 | 97 | 81 to 104 | 17 to 157 |
| LAD | 6 | 38.5 | 14.2 to 62.8 | 23.1 | 37.5 | 17 to 51 | 15 to 73 |
| RCA + Cx | 5 | 94 | 44 to 144 | 40.3 | 102 | 80 to 122 | 32 to 134 |
| The ellipticity index (height-to-width ratio; Fig. 7 ) | |||||||
| LCA or LADa | 50 | 1.3 | 1.2 to 1.4 | 0.4 | 1.2 | 1.1 to 1.6 | 1 to 2.5 |
| RCA | 50 | 1.1 | 1.1 to 1.2 | 0.2 | 1.1 | 1 to 1.2 | 1 to 1.7 |
| Position of the coronary arteries in the neoaortic sinus (height; Fig. 8 ) | |||||||
| LCS | 46 | 17 | 15.9 to 18.2 | 3.8 | 16 | 15 to 19 | 10 to 31 |
| RCS | 52 | 20.1 | 18.7 to 21.5 | 5 | 19 | 16.5 to 23 | 12 to 34 |
RCA right coronary artery, LCA left coronary artery, LAD left anterior descending coronary artery, Cx circumflex coronary artery, RCS right coronary sinus, LCS left coronary sinus, n number of measurements, CI confidence interval, SD standard deviation, IQR interquartile range
aIn cases of an absent LCA, measurements of the isolated LAD were taken for the analysis of the height-to-width ratio