Table 2.
Typical error and validity correlation of the log-transformed data for main measures of PWA and PWV between the experienced (criterion) and novice (practical) operators.
| Quintile 1 | Quintile 2 | Quintile 3 | Quintile 4 | Quintile 5 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Validity correlation (90% CL) qualitative interpretation | CV (%) | Validity correlation (90% CL) qualitative interpretation | CV (%) | Validity correlation (90% CL) qualitative interpretation | CV (%) | Validity correlation (90% CL) qualitative interpretation | CV (%) | Validity correlation (90% CL) qualitative interpretation | CV (%) | |
| 5 s PWV | 0.5 (−0.2 – 0.9) |
16.1 (10.9 – 33.2) |
0.8 (0.4 – 0.96) |
7.3 (5 – 14.4) |
0.95 (0.8 – 0.99)* |
6.2 (4.4 – 11.5) |
0.9 (0.6 – 0.97) |
4.8 (3.3 – 9.5) |
0.6 (−0.0 – 0.9) |
10.5 (7.1 – 21.0) |
| Moderate | Very large | Extremely large | Very large | Large | ||||||
| 10 s PWV | 0.8 (0.4 – 0.95) |
8.2 (5.6 – 16.3) |
0.8 (0.4 – 0.96) |
10.5 (7.1 – 21.0) |
0.9 (0.7 – 0.98)* |
9.1 (6.2 – 18.1) |
0.9 (0.5 – 0.97) |
4.7 (3.2 – 9.2) |
0.9 (0.6 – 0.97) |
6.2 (4.2 – 12.2) |
| Very large | Very large | Extremely large | Very large | Very large | ||||||
| 20 s PWV | 0.2 (−0.5 – 0.8) |
14.8 (10 – 30.2) |
0.9 (0.7 – 0.98)* |
6.9 (4.7 – 13.7) |
0.9 (0.7 – 0.98)* |
8.6 (5.9 – 17.2) |
0.8 (0.4 – 0.95) |
6 (4.1 – 11.9) |
0.9 (0.5 – 0.97) |
7.4 (5 – 14.6) |
| Small | Extremely large | Extremely large | Very large | Very large | ||||||
| AIx75 | 0.7 (0.1 – 0.9) |
67.5 (42.8 – 168.5) |
0.8 (0.3 – 0.94) |
39.3 (25.7 – 88.7) |
0.8 (0.4 – 0.9) |
25.5 (17.4 – 50.5) |
0.97 (0.88 – 0.99)* |
15 (10.2 – 30.8) |
0.97 (0.87 – 0.99)* |
25.3 (16.9 – 54.1) |
| Large | Very large | Very large | Extremely large | Extremely large | ||||||
*
r > 0.9; Data were arranged chronologically based on the date and time of the participant's assessment, and then divided into quintiles in order to assess the progressive effect of learning on performance. CL, Confidence limits; qualitative interpretation: the magnitude of the agreement between the novice and experienced operator's measurements; CV, coefficient of variation; 5 s PWV, pulse wave velocity measured over a 5-s window; 10 s PWV, pulse wave velocity measured over a 10-s window; 20 s PWV, pulse wave velocity measured over a 20-s window.