Cadernos de Saúde Pública | |
Assessing the validity of a food frequency questionnaire among low-income women in São Paulo, southeastern Brazil | |
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
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
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