Table 5.
Simple regression of SBP changes on changes in individual biological and vascular variables at week one.
| Variable | Week one | |
|---|---|---|
| Slope | P value | |
| Urinary sodium | 0.123 | 0.030 |
| Urinary potassium | −0.194 | 0.018 |
| Urinary sodium/potassium ratio | 1.987 | 0.003* |
| Urinary norepinephrine/creatinine | −685 | 0.197 |
| Urinary epinephrine/creatinine | −2256 | 0.376 |
| Plasma renin activity | −15.80 | 0.0003* |
| Plasma aldosterone | −0.473 | 0.312 |
| Plasma nitrite after hyperemia, % | −0.301 | 0.035* |
| Brachial artery flow-mediated dilation | 0.021 | 0.982 |
| Augmentation index, % | 0.736 | 0.174 |
| Pulse wave velocity, m/s | −0.184 | 0.905 |
*Since urinary sodium and urinary potassium are closely related with urinary sodium/potassium ratio, only urinary sodium/potassium ratio, plasma renin activity, and % change in plasma nitrite after hyperemia were further included in a multivariate regression model. All three variables remained significantly associated with SBP change at week one (P < 0.05 for all).