Table 1 Assessment of intra- and inter-observer variability of ascending and descending aortic measurements
INTRA-OBSERVER | ||||||
|---|---|---|---|---|---|---|
Location | Ascending aorta (n = 15) | Descending aorta (n = 15) | ||||
Variable | c (m/s) | peak FCW (×10-5 m/s) | peak FEW (×10-5 m/s) | c (m/s) | peak FCW (×10-5 m/s) | peak FEW (×10-5 m/s) |
ICC | 0.961 | 0.894 | 0.391 | 0.976 | 0.869 | 0.88 |
95 % CI | 0.887-0.987 | 0.715-0.963 | −0.153-0.754 | 0.929-0.992 | 0.654-0.984 | 0.680-0.958 |
Bias | 0.03 | −0.2 | −0.1 | −0.1 | 0.3 | 0.2 |
Limits of agreement | −0.7-0.76 | −5.9-5.5 | −2.9-2.6 | −0.4-0.2 | −6.6-7.2 | −1.2-1.6 |
INTER-OBSERVER | ||||||
Location | Ascending aorta (n = 15) | Descending aorta (n = 15) | ||||
Variable | c (m/s) | peak FCW (×10-5 m/s) | peak FEW (×10-5 m/s) | c (m/s) | peak FCW (×10-5 m/s) | peak FEW (×10-5 m/s) |
ICC | 0.937 | 0.84 | 0.315 | 0.635 | 0.694 | 0.863 |
95 % CI | 0.903-0.989 | 0.588-0.943 | −0.238-0.713 | 0.201-0.860 | 0.301-0.886 | 0.641-0.952 |
Bias | −0.07 | 3.8 | 0.02 | −0.2 | 4.2 | 0.3 |
Limits of agreement | −0.96-0.83 | −2.1-9.6 | −1.8-1.9 | −1.5-1.1 | −5.1-13.5 | −1.2-1.9 |