Validity of salt intake assessment system based on a 24-h dietary recall method using a touch panel computer

Area of Science:

• Dietary assessment
• Public health
• Hypertension management

Background:

• An electronic system for salt intake assessment using 24-hour dietary recall was developed in Japan.
• The study aimed to evaluate the validity of this system for assessing salt intake.

Purpose of the Study:

• To assess the validity of an electronic salt intake assessment system.
• To determine its utility in clinical treatment and public health initiatives.

Main Methods:

• Prospective data collection from 203 outpatients with essential hypertension.
• Comparison of salt intake estimated by the system with 24-hour urinary sodium chloride excretion (24-hUNaCl).
• Corrections applied for dietary habits, lifestyle factors, and regional differences.

Main Results:

• The system's estimated salt intake showed significant correlation with 24-hUNaCl (r=0.66).
• Correlation coefficients improved after corrections for dietary habits, lifestyle, and regional differences, reaching 0.72 overall.
• Adjusted correlations varied by age and sex, with notable improvements in older men and younger women.

Conclusions:

• The electronic salt intake assessment system is a potentially useful tool in Japan.
• The system can aid in encouraging salt restriction for hypertension management.
• It may contribute to improving public health outcomes related to salt consumption.