Table 2.
Inter-study reproducibility of aortic parameters (n = 25)
| Aortic parameters | Exam 1 | Exam 2 | P-valuea | Mean difference | ICC | SEM | SDC | Sample sizes |
|---|---|---|---|---|---|---|---|---|
| Max. Asc. area (cm2) | 10.53 ± 1.91 | 10.61 ± 1.89 | 0.663 | −0.07 ± 0.83 | 0.91** | 0.25 | 0.70 | 7 |
| Min. Asc. area (cm2) | 9.47 ± 1.72 | 9.59 ± 1.48 | 0.452 | −0.12 ± 0.77 | 0.89** | 0.26 | 0.72 | 8 |
| Max. Desc. area (cm2) | 5.56 ± 1.24 | 5.57 ± 1.25 | 0.911 | −0.01 ± 0.25 | 0.98** | 0.03 | 0.09 | 4 |
| Min. Desc. area (cm2) | 5.14 ± 1.19 | 5.14 ± 1.16 | 0.891 | −0.01 ± 0.26 | 0.98** | 0.04 | 0.11 | 4 |
| Transit time (ms) | 16.52 ± 5.00 | 16.80 ± 5.44 | 0.721 | −0.28 ± 3.87 | 0.73** | 1.99 | 5.53 | 45 |
| Transit distance (mm) | 148.25 ± 27.59 | 146.90 ± 26.44 | 0.827 | 1.34 ± 30.43 | 0.38* | 23.92 | 66.32 | 36 |
| Asc. aortic strain (%) | 11.53 ± 6.44 | 10.55 ± 6.64 | 0.443 | 0.99 ± 6.32 | 0.53* | 4.29 | 11.89 | 260 |
| Desc. aortic strain (%) | 8.65 ± 5.30 | 8.35 ± 5.26 | 0.706 | 0.30 ± 3.90 | 0.74** | 2.01 | 5.56 | 168 |
| PWV (m/s) | 9.92 ± 4.18 | 9.94 ± 4.55 | 0.968 | −0.02 ± 3.03 | 0.77** | 1.46 | 4.04 | 76 |
| VD (mm) | 27.91 ± 12.52 | 28.52 ± 13.21 | 0.845 | −0.61 ± 15.42 | 0.30 | 12.91 | 35.78 | 237 |
Values are mean ± SD. SD, standard deviation; ICC, intraclass correlation coefficient; SEM, standard error of measurement; SDC, smallest detectable change; Max., maximum; Min., minimum; Asc., ascending; Desc., descending; PWV, pulse wave velocity; VD, vertical distance between plane and aortic arch. Sample sizes were calculated by a power of 80%, an α error of 0.05 and a SD of the mean difference.
aPaired t-test.
*P < 0.05.
**P < 0.001.