[Estimate of corrected values and the effect of correction for measurement error in dietary data obtained by the Food Frequency Questionnaire for Adolescents (AFFQ)].

Abstract:

:The scope of this study was to estimate calibrated values for dietary data obtained by the Food Frequency Questionnaire for Adolescents (FFQA) and illustrate the effect of this approach on food consumption data. The adolescents were assessed on two occasions, with an average interval of twelve months. In 2004, 393 adolescents participated, and 289 were then reassessed in 2005. Dietary data obtained by the FFQA were calibrated using the regression coefficients estimated from the average of two 24-hour recalls (24HR) of the subsample. The calibrated values were similar to the the 24HR reference measurement in the subsample. In 2004 and 2005 a significant difference was observed between the average consumption levels of the FFQA before and after calibration for all nutrients. With the use of calibrated data the proportion of schoolchildren who had fiber intake below the recommended level increased. Therefore, it is seen that calibrated data can be used to obtain adjusted associations due to reclassification of subjects within the predetermined categories.

journal_name

Cien Saude Colet

journal_title

Ciencia & saude coletiva

authors

Voci SM,Enes CC,Romero A,Slater B

doi

10.1590/s1413-81232012000200019

subject

Has Abstract

pub_date

2012-02-01 00:00:00

pages

463-71

issue

2

eissn

1413-8123

issn

1678-4561

pii

S1413-81232012000200019

journal_volume

17

pub_type

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