Table 2.
Intra-reader reproducibility and inter-reader variability.
| Intra-reader ICC for SFA Velocities |
Intra-reader ICC for Background Correction Tracings |
|||||
|---|---|---|---|---|---|---|
| N (patients) | ICC | CI (95%) | N (patients) | ICC | CI (95%) | |
|
|
|
|||||
| Individual ICC, mean | 10 | 0.996 | 0.996 – 0.997 | 10 | 0.99 | 0.986 – 0.992 |
| Average ICC, mean | 10 | 0.998 | 0.998 – 0.998 | 10 | 0.995 | 0.993 – 0.996 |
| Individual ICC, maximum | 10 | 0.999 | 0.999 – 0.999 | 10 | 0.972 | 0.961 – 0.980 |
| Average ICC, maximum | 10 | 0.999 | 0.999 – 0.999 | 10 | 0.986 | 0.980 – 0.989 |
|
| ||||||
| Inter-reader ICC for background correction tracings |
||||||
| Individual ICC, mean | 20 | 0.988 | 0.986 – 0.989 | |||
| Average ICC, mean | 20 | 0.994 | 0.993 – 0.994 | |||
| Individual ICC, maximum | 20 | 0.948 | 0.921 – 0.964 | |||
| Average ICC, maximum | 20 | 0.973 | 0.959 – 0.981 | |||
ICC and confidence interval were calculated using a two-way model. SFA: Superficial Femoral Artery. ICC: intra-class correlation. CI: Confidence interval.