Session on sodium and calcium in the management of hypertension summary of remarks of discussant and chairman.

The evidence favouring a link between sodium and blood pressure, namely the interpopulation comparisons, the experimental animal models, and clinical trials of high sodium intake and very low sodium diets, appears to outweigh the evidence disputing this relationship. Differences between studies on the effect of sodium restriction on blood pressure may be explained by differences in a large number of factors including the nature of the study population, dietary sodium intake, amount of reduction of sodium, concurrent dietary intake of other ions and alcohol, and blood pressure at entry into the study. Further research is needed in order to answer the questions raised herein and to provide additional information on sodium and calcium management of hypertension.