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Estimation of salt intake by questionnaire.

R Shepherd, C A Farleigh, D G Land

    Appetite
    |September 1, 1985
    PubMed
    Summary

    This study validated a new questionnaire for assessing dietary salt intake. The questionnaire provides a useful estimate of total salt intake, particularly for group analysis.

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    Area of Science:

    • Nutrition Science
    • Dietary Assessment
    • Public Health

    Background:

    • Accurate assessment of dietary salt intake is crucial for public health initiatives.
    • Existing methods for measuring salt consumption can be complex or burdensome.
    • Developing reliable and user-friendly tools for salt intake assessment is essential.

    Purpose of the Study:

    • To develop and validate a questionnaire for assessing dietary salt intake.
    • To evaluate the reliability and predictive accuracy of the questionnaire.
    • To determine the utility of the questionnaire for estimating total salt consumption.

    Main Methods:

    • Principal components analysis (PCA) was used to analyze responses from 155 subjects.
    • Validation involved comparing questionnaire data with 7-day urinary sodium excretion in 33 subjects.
    • Measures included table salt usage and cooking salt usage over 7 days.

    Main Results:

    • The questionnaire showed good prediction for total salt intake (r = 0.66) and table salt use (r = 0.70).
    • Prediction for cooking salt use was less accurate (r = 0.17).
    • Test-retest reliability for total intake estimation was strong (r = 0.75).

    Conclusions:

    • The developed questionnaire offers a practical and useful method for estimating population-level salt intake.
    • It is particularly suitable for studies requiring group mean estimates rather than precise individual measurements.
    • Further refinement may be needed to improve the accuracy of cooking salt usage prediction.

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