Adherence
Higher body mass index (BMI) is strongly associated with greater underreporting of sodium intake, particularly when using Food Frequency Questionnaires (FFQs).
If you have a higher BMI, be aware that your self-reported sodium intake is likely to be significantly underestimated (by 28-39% on average). This bias is stronger when using Food Frequency Questionnaires. Consider using 24-hour recalls or objective biomarkers if precise sodium tracking is critical for your health goals.
Higher body mass index was related to underreporting of sodium.
Why this rating
Consistent finding across studies, though the magnitude varies.
Source
Pooled Results From 5 Validation Studies of Dietary Self-Report Instruments Using Recovery Biomarkers for Potassium and Sodium Intake
Laurence S. Freedman et al. · American Journal of Epidemiology · 2015
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