The USDA Automated Multiple-Pass Method accurately assesses population sodium intakes

Area of Science:

• Nutrition Science
• Dietary Assessment
• Public Health

Background:

• Accurate sodium intake monitoring is essential for public health, particularly for sodium-reduction strategies.
• The 24-hour urine collection is the gold standard but rarely used to validate dietary instruments.
• This study addresses the need for practical and accurate sodium intake assessment methods.

Purpose of the Study:

• To validate the accuracy of the USDA Automated Multiple-Pass Method (AMPM) for self-reported sodium intake.
• To compare self-reported dietary sodium with 24-hour urinary sodium excretion.

Main Methods:

• Utilized data from 465 healthy volunteers (aged 30-69) in the USDA AMPM Validation Study.
• Collected 24-hour dietary recalls and complete 24-hour urine samples from participants.
• Calculated reporting accuracy by comparing self-reported sodium intake with urinary sodium excretion.

Main Results:

• Overall reporting accuracy was 0.93 for men and 0.90 for women.
• Accuracy was highest in normal-weight individuals (BMI < 25).
• Older women (50-69 years) demonstrated higher reporting accuracy than younger women.

Conclusions:

• The USDA AMPM is a valid tool for estimating population-level sodium intake in adults.
• Findings support the use of AMPM for dietary sodium assessment in public health surveillance.
• The method provides practical and accurate data for guiding sodium-reduction initiatives.