Table 4 Intra- and interobserver reproducibility of the entire process (acquisition including analysis) and of solely the analysis of ultrasound measurements
Parameter | Location | Time point | Process (n = 26) | Analysis (n = 10) | |
|---|---|---|---|---|---|
Intra-observer ICC (95% CI) | Intra-observer ICC (95% CI) | Inter-observer ICC (95% CI) | |||
IMT (mm) | Distal CCA | Diastole | 0.972 (0.956–0.983) | 0.930 (0.833–0.972) | 0.939 (0.853–0.976) |
ICA | 0.657 (0.510–0.778) | 0.570 (0.167–0.726) | 0.272 (− 0.100–0.607) | ||
PWV (m/s) | Mid-CCA | Begin-systole | 0.725 (0.554–0.852) | n/a1 | n/a1 |
End-systole | 0.707 (0.551–0.828) | n/a1 | n/a1 | ||
SWV (m/s) | Proximal CCA | Averaged | A: 0.873 (0.804–0.922) | A: 0.998 (0.994–0.999) | A: 0.991 (0.977–0.997) |
P: 0.745 (0.628–0.837) | P: 0.995 (0.979–0.998) | P: 0.978 (0.867–0.994) | |||
Mid-CCA | A: 0.919 (0.874–0.950) | A: 0.997 (0.992–0.999) | A: 0.995 (0.986–0.998) | ||
P: 0.876 (0.811–0.923) | P: 0.997 (0.984–0.999) | P: 0.986 (0.885–0.996) | |||
Distal CCA | A: 0.899 (0.846–0.937) | A: 0.997 (0.992–0.999) | A: 0.996 (0.989–0.998) | ||
P: 0.881 (0.820–0.926) | P: 0.998 (0.984–0.999) | P: 0.992 (0.976–0.997) | |||
ICA | A: 0.916 (0.866–0.950) | A: 0.994 (0.986–0.998) | A: 0.988 (0.970–0.995) | ||
P: 0.859 (0.773–0.919) | P: 0.974 (0.928–0.990) | P: 0.963 (0.898–0.986) | |||