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European Heart Journal 1983 4(9):608-613;
Copyright © 1983 by the European Society of Cardiology.
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© 1983, by the European Society of Cardiology

Characteristics of the association between salt intake and blood pressure in a sample of male working population in southern Italy

P. STRAZZULLO, M. TREVISAN, E. FARINARO, F. P. CAPPUCCIO, L. A. FERRARA, E. DE CAMPORA and M. MANCINI

Institute of Internal Medicine and Metabolic Diseases, Center for Atherosclerosis and Metabolic Disorders, 2nd Medical School, University of Naples Naples, Italy

Received 21 July 1982; revised 30 November 1982; .

Correspondence to. Dr P. Strazzullo, Semeiotica Medica, Nuovo Policlinico, Via S. Pansini 5, 80131—Napoli, Italy.

Abstract

A possible association between dietary salt intake and blood pressure was investigated in an unselected sample of 188 healthy Neapolitan men.

In umvariate analysis diastolic pressure was positively correlated with age, body mass index and 24-h excretion of sodium, potassium and crealinine, but not with urine volume or sodium: potassium ratio. Systolic pressure was also related to age, body mass index and 24-h sodium, but to a lesser degree.

As a high level of intercorrelation was apparent, multivariate analysis was also carried out. Body mass index was shown to be the variable having the largest influence on diastolic pressure variability: nevertheless a significant independent role was still found for 24-h urinary sodium when the latter was included in a regression along with body mass index, age, urine volume and potassium excretion.

These results seem to support the possibility that dietary salt has a substantial influence on blood pressure levels.

Key Words: Dietary salt intake • blood pressure


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