Validation of a diet history questionnaire for use with Costa Ricanadults

[摘要] ObjectiveTo validate a diet history questionnaire (DHQ) using a weighed food record(WFR) as the standard method in the estimation of food consumption andnutrient intake in a group of adults.DesignWFR: all foods consumed by subjects during 7 consecutive days were weighedand recorded by nutrition students. Two DHQ interviews were carried out ondays 1 (first diet history questionnaire, DHQ1) and 28 (second diet historyquestionnaire, DHQ2).SettingCosta Rica.SubjectsSixty adults: 30 men and 30 women; 30 living in urban and 30 in ruralareas.ResultsIn comparison to the WFR, the DHQ1 gave statistically significant higherestimates of the mean intake of 19 nutrients for men and of three nutrientsfor women. The uncorrected correlation coefficients for nutrient intakeaccording to both methods ranged from 0.40 to 0.83 for males and from 0.22to 0.62 for females. Percentage of subjects classified in the same quartilesof nutrient intake according to each method ranged from 33.3% to 63.3% formales and from 23.3% to 53.3% for females. Misclassification in extremequartiles ranged from 0% to 13.3% for both sexes. The mean food groupconsumption, according to the DHQ1, when compared with the WFR, gavestatistically significant differences for three of the 18 food groups formen and for two groups in the case of women. The two applications of the DHQgave similar results.ConclusionValidation of a DHQ using a WFR as the standard method gave results thatcompare favourably with those reported by other authors. This study foundimportant differences in the response of men and women to the DHQ: amongmen, the estimates of mean nutrient intake from DHQ1 were significantlygreater than those of the WFR, while in the case of women, the mean nutrientintake estimates from both methods were not significantly different. Therewas a higher degree of correlation between the DHQ1 and the WFR meannutrient intakes among men than among women. The DHQ showed goodreproducibility.

[学科分类] 卫生学

[关键词] Diet History Questionnaire;Dietary assessment methods;Nutritional epidemiology