Table 3 Comparison of subjective evaluation of image quality, diagnostic confidence, and grading of infrapopliteal vessels in three groups.
Group A (n = 45) | Group B (n = 45) | Group C (n = 45) | Statistics | P value | ||
|---|---|---|---|---|---|---|
Subjective image quality | ||||||
AIS* score | Reader 1 | 5 (3.5) | 5 (3.5) | 5 (3.5) | 4.99 | 0.082 |
Reader 2 | 5 (3.5) | 5 (3.5) | 5 (3.5) | 4.68 | 0.096 | |
Kappa | 0.933 | 0.908 | 0.927 | |||
FPS* score | Reader 1 | 5 (2.5) | 5 (4.5) | 5 (4.5) | 17.71 | < 0.001ab |
Reader 2 | 5 (2.5) | 5 (4.5) | 5 (4.5) | 19.79 | < 0.001ab | |
Kappa | 0.775 | 0.726 | 0.895 | |||
LKS* score | Reader 1 | 3 (1.5) | 4 (3.5) | 5 (4.5) | 76.15 | < 0.001abc |
Reader 2 | 3 (1.5) | 4 (3.5) | 5 (4.5) | 76.2 | < 0.001abc | |
Kappa | 0.897 | 0.896 | 0.911 | |||
LKS*Vascular grading | Reader 1 | 3 (1.5) | 4 (1.5) | 5 (3.5) | 45.73 | < 0.001bc |
Reader 2 | 3 (1.5) | 4 (1.5) | 5 (3.5) | 46.81 | < 0.001bc | |
Kappa | 0.962 | 0.952 | 0.965 | |||
Diagnostic confidence | ||||||
AIS*score | Reader 3 | 3 (2.3) | 3 (2.3) | 3 (2.3) | 0.51 | 0.774 |
Reader 4 | 3 (2.3) | 3 (2.3) | 3 (2.3) | 0.29 | 0.861 | |
Kappa | 0.656 | 0.656 | 0.789 | |||
FPS* score | Reader 3 | 3 (1.3) | 3 (2.3) | 3 (2.3) | 2.14 | 0.334 |
Reader 4 | 3 (1.3) | 3 (2.3) | 3 (2.3) | 0.78 | 0.675 | |
Kappa | 0.902 | 0.656 | 0.845 | |||
LKS* score | Reader 3 | 2 (1.3) | 3 (1.3) | 3 (2.3) | 51.24 | < 0.001abc |
Reader 4 | 2 (1.3) | 3 (1.3) | 3 (2.3) | 56.46 | < 0.001abc | |
Kappa | 0.942 | 0.967 | 0.789 | |||
