Table 4.
Qualitative analysis of each reviewer
| Readers | LAD |
LCX |
RCA |
|||||
|---|---|---|---|---|---|---|---|---|
| Proximal | Mid | Distal | Proximal | Distal | Proximal | Mid | Distal | |
| Image quality score | ||||||||
| R-1 | ||||||||
| Group 1 | 3.5 ± 0.5a | 3.3 ± 0.5a | 3.2 ± 0.5 | 3.4 ± 0.5 | 3.3 ± 0.5 | 3.5 ± 0.5 | 3.3 ± 0.4a | 3.1 ± 0.4a,b |
| Group 2 | 3.9 ± 0.5 | 3.8 ± 0.4 | 3.8 ± 0.5 | 3.9 ± 0.4 | 3.7 ± 0.4a | 3.9 ± 0.4 | 3.8 ± 0.4 | 3.8 ± 0.5 |
| R-2 | ||||||||
| Group 1 | 3.6 ± 0.5a | 3.2 ± 0.5a | 3.2 ± 0.4 | 3.3 ± 0.4 | 3.2 ± 0.6 | 3.3 ± 0.2 | 3.2 ± 0.5 | 3.1 ± 0.4a |
| Group 2 | 3.9 ± 0.4 | 3.9 ± 0.3 | 3.8 ± 0.4 | 3.9 ± 0.4 | 3.8 ± 0.4 | 3.9 ± 0.4 | 3.9 ± 0.4 | 3.8 ± 0.4 |
| Final | ||||||||
| Group 1 | 3.5 ± 0.5 | 3.2 ± 0.5a | 3.2 ± 0.4a | 3.3 ± 0.4 | 3.2 ± 0.6a | 3.3 ± 0.2 | 3.2 ± 0.5a | 3.1 ± 0.4a |
| Group 2 | 3.9 ± 0.4 | 3.8 ± 0.4 | 3.8 ± 0.4 | 3.9 ± 0.4 | 3.7 ± 0.4 | 3.9 ± 0.4 | 3.8 ± 0.4 | 3.8 ± 0.4 |
| p- value | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 |
| Kappa value | ||||||||
| Group 1 | 0.67 | 0.62 | 0.70 | 0.65 | 0.65 | 0.46 | 0.67 | 0.78 |
| Group 2 | 0.71 | 0.68 | 0.71 | 0.78 | 0.70 | 0.78 | 0.68 | 0.72 |
Group 1, 100 kVp; Group 2, 80 kVp; LAD, left anterior descending artery; LCX, left circumflex artery; R-1, Reader 1; R-2, Reader 2; RCA, right coronary artery.
a
Significant difference compared with proximal vessel.
b
Significant difference compared with mid vessel.