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Salt-sensitive phenotypes: A community-based exploratory study from northeastern India.

Prasanta K Borah1, Meenakshi Sharma2, Hem C Kalita3

  • 1Regional Medical Research Centre, North East Region (ICMR), Dibrugarh 786001, Assam, India.

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|May 3, 2019
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This summary is machine-generated.

High salt intake significantly increases cardiovascular disease risk. Many individuals in Northeast India exhibit salt sensitivity, highlighting the need for dietary salt restriction to manage hypertension.

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Area of Science:

  • Cardiovascular Health
  • Hypertension Research
  • Nutritional Science

Background:

  • Salt sensitivity is a known risk factor for cardiovascular diseases in both normal and high blood pressure individuals.
  • Northeastern India's population consumes excessive dietary salt, but their salt-sensitive phenotype remains unknown.
  • Understanding salt sensitivity is crucial for public health initiatives in regions with high salt consumption.

Purpose of the Study:

  • To determine the prevalence of salt-sensitive (SS) and salt-resistant (SR) phenotypes in the population of Northeast India.
  • To investigate the association between dietary salt intake and salt sensitivity.
  • To provide evidence for salt restriction as a hypertension management strategy.

Main Methods:

  • A community-based exploratory study was conducted with 374 participants (206 normotensive, 168 hypertensive).
  • Participants underwent a 7-day low-salt diet (2.9 g/day) followed by a 7-day high-salt diet (15.2 g/day).
  • Salt sensitivity was defined as an increase in mean arterial blood pressure of ≥9 mmHg after the high-salt diet.

Main Results:

  • A significant increase in systolic blood pressure was observed after the high-salt diet (9.3 mmHg in normotensive, 10.7 mmHg in hypertensive).
  • The salt-sensitive phenotype was prevalent in 40.8% of normotensive and 47.6% of hypertensive subjects.
  • Increased salt consumption was independently associated with salt sensitivity (adjusted OR 1.99).

Conclusions:

  • A substantial proportion of both normotensive and hypertensive individuals in Northeast India exhibit salt sensitivity.
  • Dietary salt restriction emerges as a potentially effective intervention for managing hypertension in salt-sensitive individuals.
  • These findings underscore the importance of public health strategies focused on reducing dietary salt intake in this region.