Estimates and confidence interval for the mixed-effect “location” and the end point pulsatility indexa
| Estimate | SD | 95% CI | T | P | |
|---|---|---|---|---|---|
| (Intercept) | 1.01 | 0.03 | (0.9–1.07) | 33.8 | <.001 |
| I | 0.14 | 0.03 | (0.08–0.2) | 4.67 | <.001 |
| III | −0.22 | 0.03 | (−0.27–0.16) | −7.42 | <.001 |
↵a Location II is taken as base. This means that the estimate of the decrease from I (respectively III) to II is calculated by comparing the pulsatility index at segment I (respectively III) with the pulsatility index at segment II (Intercept), which explains the negative sign for the estimate in sections II to III. The estimated variances between volunteers and those between left and right side measurements are negligible.