Reprodutibilidade e validade de um questionário de frequência alimentar em adultos da cidade de Porto Alegre/RS

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

To assess the reproducibility and validity of a food frequency questionnaire in adults living in south of Brazil. The food frequency questionnaire was administered twice in 83 participants, ages 20 to 69. The reproducibility was tested with Spearman correlations and intra-class correlation coeficients. To validity, average nutrient intake from the three 24h dietary recalls were compared to average intakes from each FFQs (FFQ1 and FFQ2) by calculating Pearson correlation coefficients and adjusting for energy intake and within person variation. The nutrients were categorized into quartiles. The average intake was higher for deal of nutrients in the FFQ1 and FFQ2, when it was compared with average intake from the three IR24h. The average correlation coefficients intra-class was 0,63, while the average, considering, Spearman correlation was 0,62. To the validity, our founds was 0,41, the average of Pearson correlation to a FFQ1 and 0,46 to FFQ2. The average classification percentage in the same quartile for the two methods was 36% for FFQ1 , 37% for FFQ2, and the classification in extreme opposite quartiles were 7% for FFQ1 and 4% for FFQ2. The FFQ showed a good reproducibility and a reasonable relative validity

ASSUNTO(S)

reprodutibilidade reprodutibilility food frequency questionnaire saude coletiva validade validity freqüência alimentar questionário

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