J.: Epidemiological evidence of an interaction between calcium and sodium intake impacting on blood pressure. A Montréal study

Nutritional calcium and sodium are considered to be important regulators of blood pressure. This study was performed on 182 randomly selected Ca-nadians from Montreal to test the relative contribu-tion of these ions to systolic and diastolic blood pressure, as well as their interaction with other de-mographic indices. Multiple analysis of the total study population revealed that 28 % (P <.001) of systolic blood pressure was predicted by gender, sodium, and calcium interaction (P =.003), weight, and the additive effect of age and weight. The same characteristics contributed to 37 % (P <.001) of dia-stolic blood pressure with an additional contribu-tion of alcohol intake. Analysis by terciles of so-dium and calcium intake indicated that the positiv