Jane Watson|Clare E. Collins|David Sibbritt|Michael J. Dibley|Manohar L. Garg
Reproducibility and comparative validity of a food frequency questionnaire for Australian children and adolescents
University of Newcastle Australia|University of Newcastle Australia|University of Newcastle Australia|The George Institute for Global Health|University of Sydney|University of Newcastle Australia
dietary intake childhood adolescence increasing interest due influence adult health particularly obesity cardiovascular disease diabetes need develop validate dietary assessment methods suitable large epidemiologic studies children adolescents limited large scale dietary studies youth undertaken australia due partly lack suitable dietary intake tool selfadministered semiquantitative foodfrequency questionnaire ffq australian child adolescent eating survey acaes developed youth aged 916 years study evaluated reproducibility comparative validity acaes ffq using assisted food records frs reference method acaes ffq completed twice ffq1 ffq2 interval 5 months along four oneday assisted frs validity evaluated comparing average frs ffq2 n 113 well average ffq1 ffq2 n 101 reproducibility evaluated comparing ffq1 ffq2 n 101 two methods compared using correlations kappa statistics blandaltman plots correlation coefficients comparative validity ranged 003 retinol 056 magnesium transformed energyadjusted deattenuated nutrient data correlation coefficients greater 040 total fat saturated fat monounsaturated fat carbohydrate sugars riboflavin vitamin c folate betacarotene magnesium calcium iron correlation coefficients reproducibility ranged 018 vitamin 050 calcium transformed energyadjusted deattenuated nutrient data acaes ffq ranked individuals reasonably accurately comparative validity analysis showing 50 participants classified within one quintile nutrients small percentage grossly misclassified 07 acaes ffq first child adolescent specific ffq available ranking dietary intakes australian children adolescents range nutrients epidemiologic research public health interventions