Fig. 6. Regression analysis of the relation between sodium reduction and change in plasma renin (R) and change in plasma aldosterone (A) where R=0.020 x [sodium reduction] (95% CI, 0.018–0.022), r²=0.43, and P<0.001; A=0.017 x [sodium reduction] (95% CI, 0.015–0.019), r²=0.41, and P<0.001. Reprinted with permission from Graudal et al. [8].