[OP.8E.02] SALT AND POTASSIUM INTAKE IN SOUTH AFRICA: AN EVALUATION OF 24-HOUR URINE COLLECTIONS IN THREE ETHNIC GROUPS

    loading  Checking for direct PDF access through Ovid

Abstract

Objective:

Because of the overwhelming effect of sodium, as reflected in the high prevalence of hypertension in South Africans, the South African Department of Health is in the process of implementing a nationwide sodium reduction strategy, which will come into effect in June 2016. An establishment of a data platform which will provide a basis for the on-going monitoring of the impact of the proposed sodium reduction regulation, is much needed. The overall purpose of this research paper is the establishment of the 24-hour sodium excretion of three different populations divergent in geographical regions to provide a baseline of the sodium (salt) intake of South Africans prior to the reduction legislation.

Design and method:

We obtained data from three on-going studies between the periods of 2013 to 2015. One of the studies is a prospective 10-year study and the other two was cross-sectional of nature. In total, data was collected from 693 White, Black and Indian individuals. 24-hour urine collections were done according the WHO standards. Sodium and potassium were analysed by means of ion-selective electrode potentiometry on the Cobas Integra® 400 plus (Roche, Basal Switzerland).

Results:

The mean sodium and potassiumin excretion of the population was 152.1 mmol/day (3498 mg/day OR 8.7 g salt/day) and 43.4 mmol/day (1692 mg/day) respectively. Overall men had higher sodium as well potassium excretion than women (p = 0.001). The Black population showed higher sodium and potassium excretion compared to Whites and Indians (p = 0.003). Sodium excretion is the highest in men under the age of 30 years (172.7 mmol/day). The highest potassium (51.6 mmol/day) and sodium (200.8 mmol/day) excretion were observed in men with a BMI of above 30 kg/m2. The mean Na:K in this study is 2:3.

Conclusions:

Only 7.2% of the population is reaching the recommended potassium intake of 90 mmol/day. With regards to the sodium excretion, 76.2% of the population is above the recommended 86 mmol/day. This research supports the governement's initiave of implementing a sodium reduction legislation and provides valuable information with regards to South African's salt intake and the effect it will have on the public health system in terms of blood pressure.

Related Topics

    loading  Loading Related Articles