Assessing the validity of a food frequency questionnaire among low-income women in São Paulo, southeastern Brazil

Cadernos de Saúde Pública

Marly Augusto Cardoso¹  Luciana Yuki Tomita¹  Elaine Cristina Laguna¹ 

[1] ,Universidade de São Paulo Faculdade de Saúde Pública São Paulo,Brasil

关键词: Food Consumption;    Validation Studies;    Questionnaires;    Women;    Consumo de Alimentos;    Estudos de Validação;    Questionários;    Mulheres;   

DOI  :  10.1590/S0102-311X2010001100007

来源: SciELO

【 摘 要 】

This study describes the validity of a food frequency questionnaire (FFQ) in 93 low-income women (20-65 years), participating in a case-control study in São Paulo, Brazil. Two FFQ (FFQ1 and FFQ2, 12 months apart) and three 24-hour dietary recalls (24hR) were conducted between 2003 and 2004 to estimate dietary intake during the past year. The Pearson correlation coefficients (crude, energy-adjusted and de-attenuated) were used for comparisons between FFQ and 24hR. The agreement between the methods was further examined by the Bland-Altman analysis. For the assessment of long-term reliability, the energy-adjusted intra-class correlation coefficients were mostly around 0.40, but higher for vitamin A and folate (0.50-0.56). Energy-adjusted, attenuation-corrected Pearson validity correlations between FFQ and DR ranged from 0.30-0.54 for macronutrients to 0.20-0.48 for micronutrients, with higher value for calcium (0.75). There were small proportions of grossly misclassified nutrient intakes, while Bland-Altman plots indicated that the FFQ is accurate in assessing nutrient intake at a group level.

【 授权许可】

CC BY   
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