Investigation of a Dietary Behavior Questionnaire as a Predictor of Dietary Sodium Intake
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Sodium intake in the United States population exceeds the physiologic need. Excessive salt intake is associated with hypertension, kidney stone formation, osteoporosis and cardiovascular accidents. A lifestyle modification, such as dietary salt restriction, is an inexpensive, effective disease prevention option. There is currently no questionnaire available to assess an individual's sodium intake. The purpose ofthis study was to detemline if a researcher developed Dietary Behavior Questionnaire reflects an individual's sodium intake. Thirty-nine subjects participating in a Kidney Stone Research study completed a Dietary Behavior Questionnaire and a commercial Food Frequency Questionnaire. Responses to the Dietary Behavior Questionnaire were compared with sodium intake estimated from the Food Frequency Questionnaire, the sodium previously calculated from a 24-hour dietary record, and the 24-hour urinary sodium level previously measured during the Kidney Stone Research study. No significant correlations were found between either individual question or a totaled score and the urinary and dietary measures of sodium. Although results of the analysis showed few statistically significant correlations among the variables, certain behaviors from the questionnaire were clinically significant.