"Sodium Excretion and Risk of Developing Coronary Heart Disease"
Circ
http://circ.ahajournals.org/content/129/10/1121.abstract 
"Conclusions—Overall, there was no association between sodium excretion and risk of CHD. The association between sodium excretion and CHD risk was modified by NT-proBNP. Higher sodium excretion was associated with an increased CHD risk among subjects with increased NT-proBNP concentrations or with hypertension."