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Revista médica de Chile

Print version ISSN 0034-9887

Abstract

DOMINGUEZ CANCINO, Karen  and  PAREDES ESCOBAR, María Cristina. Impact of high salt consumption of blood pressure on a non-hypertensive population. Rev. méd. Chile [online]. 2017, vol.145, n.12, pp.1597-1604. ISSN 0034-9887.  http://dx.doi.org/10.4067/s0034-98872017001201597.

Background

There is conflicting evidence regarding the role of salt intake in blood pressure (BP).

Aim

To estimate the impact of salt consumption on the BP level of a non-hypertensive population aged between 15 and 64 years.

Material and Methods

Analytical-observational study using data from the National Health Survey 2009-2010. A BP cut-off point at 120/80 mmHg BP was considered to determine risk. Salt consumption was divided into four strata. The prevalence ratios (PR) were determined using the Poisson model with robust variance. The formulas of the studies of Dal Grande and Walter for the estimation of population attributable fraction (PAF) were used.

Results

The sample was constituted by 1,263 individuals and 24.3% had BP at risk. A statistically significant association was observed between high salt intake and risk BP with PR of 1.91 (95% confidence intervals (CI) 1.44-2.57) in the consumption stratum of 11 g / day and more. It was estimated that 4.7% (95% CI 4.2-5.2) of BP risk can be attributed to salt consumption, when controlling by age group, sex and educational level.

Conclusions

The 4.7% PAF is lower than the figure of 30% reported abroad. Interventions to reduce salt consumption in the entire population and the identification of risk groups are recommended.

Keywords : Arterial Pressure; Public Health; Sodium; Dietary.

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