Daisy Lopes Del Pino1, Rogério Friedman. 1. Programa de Pós-Graduação em Ciências Médicas: Endocrinologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
Abstract
OBJECTIVE: To adapt and test the relative validity of an instrument measuring the usual food intake of 6-10-year-old children. DESIGN: An FFQ encompassing the preceding 6 months was adapted and compared with the average of three 24 h dietary recalls. SETTING: Private and public schools in Porto Alegre, capital city of Rio Grande do Sul, the southernmost state in Brazil, with 1·5 million inhabitants. SUBJECTS: Children aged 6-10 years attending grades 1-4 in private and public schools in Porto Alegre. RESULTS: Ninety-one children were studied. The FFQ overestimated all nutrients. Correlations with the values obtained by 24 h dietary recalls were mostly above 0·50. The deattenuated correlations increased for all nutrients. The κ coefficients for the adjusted nutrients varied from 0·12 (weak) to 0·34 (reasonable). Graphically, the FFQ was shown to underestimate some of the parameters and to overestimate others, with a wide CI for all nutrients. CONCLUSIONS: The FFQ does not have the required relative validity to classify the intake levels of schoolchildren, and further investigation is required to understand the sources of error.
OBJECTIVE: To adapt and test the relative validity of an instrument measuring the usual food intake of 6-10-year-old children. DESIGN: An FFQ encompassing the preceding 6 months was adapted and compared with the average of three 24 h dietary recalls. SETTING: Private and public schools in Porto Alegre, capital city of Rio Grande do Sul, the southernmost state in Brazil, with 1·5 million inhabitants. SUBJECTS:Children aged 6-10 years attending grades 1-4 in private and public schools in Porto Alegre. RESULTS: Ninety-one children were studied. The FFQ overestimated all nutrients. Correlations with the values obtained by 24 h dietary recalls were mostly above 0·50. The deattenuated correlations increased for all nutrients. The κ coefficients for the adjusted nutrients varied from 0·12 (weak) to 0·34 (reasonable). Graphically, the FFQ was shown to underestimate some of the parameters and to overestimate others, with a wide CI for all nutrients. CONCLUSIONS: The FFQ does not have the required relative validity to classify the intake levels of schoolchildren, and further investigation is required to understand the sources of error.
Authors: Julia Steinberger; Stephen R Daniels; Nancy Hagberg; Carmen R Isasi; Aaron S Kelly; Donald Lloyd-Jones; Russell R Pate; Charlotte Pratt; Christina M Shay; Jeffrey A Towbin; Elaine Urbina; Linda V Van Horn; Justin P Zachariah Journal: Circulation Date: 2016-08-11 Impact factor: 29.690
Authors: Jessica Marcinkevage; Ana-Lucia Mayén; Clara Zuleta; Ann M DiGirolamo; Aryeh D Stein; Manuel Ramirez-Zea Journal: PLoS One Date: 2015-10-14 Impact factor: 3.240