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Validation and calibration of a semiquantitative food frequency questionnaire designed for adolescents.
J Am Diet Assoc. 2010 Aug; 110(8):1170-7.JA

Abstract

BACKGROUND

Epidemiologic studies must have a reliable method for evaluating food intake; therefore, valid, precise, and practical instruments are essential.

OBJECTIVE

To assess the relative validity and estimate the calibration factors of a semiquantitative food frequency questionnaire (FFQ) for adolescents.

DESIGN

Validation and calibration study.

SUBJECTS/SETTINGS

This study enrolled 169 adolescents from Rio de Janeiro, Brazil. A set of three food records was used as the reference method.

STATISTICAL ANALYSES PERFORMED

The relative validity was analyzed according to weighted kappa values for the quartile categorization of energy and nutrient intakes, Pearson correlation coefficients, and the Bland-Altman method. To estimate the calibration factors for the FFQ, linear regression models, including the food record means as dependent variables and the FFQ estimations as independent variables were developed for boys and girls.

RESULTS

The weighted kappa values ranged from 0.28 to 0.44 for the raw data and from 0.16 to 0.39 for the deattenuated and energy-adjusted data. The Pearson correlation coefficients ranged from 0.33 to 0.46, and the mean agreement varied from 62% to 143%. The calibration factors estimated for boys ranged from 0.15 to 0.48, and the factors estimated for girls ranged from 0.14 to 0.47. The mean energy and nutrient intakes estimated by the calibrated FFQ were similar to the means estimated by the food records; however, the standard deviations were smaller for the calibrated FFQ estimations.

CONCLUSIONS

The tested FFQ is a suitable tool for ranking energy and nutrients intake in the studied group. Calibration factors are needed to estimate energy and nutrient intake means and should be used to correct raw data as well as association measurements based on FFQ data.

Authors+Show Affiliations

Department of Nutrition, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Validation Study

Language

eng

PubMed ID

20656092

Citation

Araujo, Marina Campos, et al. "Validation and Calibration of a Semiquantitative Food Frequency Questionnaire Designed for Adolescents." Journal of the American Dietetic Association, vol. 110, no. 8, 2010, pp. 1170-7.
Araujo MC, Yokoo EM, Pereira RA. Validation and calibration of a semiquantitative food frequency questionnaire designed for adolescents. J Am Diet Assoc. 2010;110(8):1170-7.
Araujo, M. C., Yokoo, E. M., & Pereira, R. A. (2010). Validation and calibration of a semiquantitative food frequency questionnaire designed for adolescents. Journal of the American Dietetic Association, 110(8), 1170-7. https://doi.org/10.1016/j.jada.2010.05.008
Araujo MC, Yokoo EM, Pereira RA. Validation and Calibration of a Semiquantitative Food Frequency Questionnaire Designed for Adolescents. J Am Diet Assoc. 2010;110(8):1170-7. PubMed PMID: 20656092.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Validation and calibration of a semiquantitative food frequency questionnaire designed for adolescents. AU - Araujo,Marina Campos, AU - Yokoo,Edna Massae, AU - Pereira,Rosangela Alves, PY - 2009/09/16/received PY - 2010/03/01/accepted PY - 2010/7/27/entrez PY - 2010/7/27/pubmed PY - 2010/8/20/medline SP - 1170 EP - 7 JF - Journal of the American Dietetic Association JO - J Am Diet Assoc VL - 110 IS - 8 N2 - BACKGROUND: Epidemiologic studies must have a reliable method for evaluating food intake; therefore, valid, precise, and practical instruments are essential. OBJECTIVE: To assess the relative validity and estimate the calibration factors of a semiquantitative food frequency questionnaire (FFQ) for adolescents. DESIGN: Validation and calibration study. SUBJECTS/SETTINGS: This study enrolled 169 adolescents from Rio de Janeiro, Brazil. A set of three food records was used as the reference method. STATISTICAL ANALYSES PERFORMED: The relative validity was analyzed according to weighted kappa values for the quartile categorization of energy and nutrient intakes, Pearson correlation coefficients, and the Bland-Altman method. To estimate the calibration factors for the FFQ, linear regression models, including the food record means as dependent variables and the FFQ estimations as independent variables were developed for boys and girls. RESULTS: The weighted kappa values ranged from 0.28 to 0.44 for the raw data and from 0.16 to 0.39 for the deattenuated and energy-adjusted data. The Pearson correlation coefficients ranged from 0.33 to 0.46, and the mean agreement varied from 62% to 143%. The calibration factors estimated for boys ranged from 0.15 to 0.48, and the factors estimated for girls ranged from 0.14 to 0.47. The mean energy and nutrient intakes estimated by the calibrated FFQ were similar to the means estimated by the food records; however, the standard deviations were smaller for the calibrated FFQ estimations. CONCLUSIONS: The tested FFQ is a suitable tool for ranking energy and nutrients intake in the studied group. Calibration factors are needed to estimate energy and nutrient intake means and should be used to correct raw data as well as association measurements based on FFQ data. SN - 1878-3570 UR - https://www.unboundmedicine.com/medline/citation/20656092/Validation_and_calibration_of_a_semiquantitative_food_frequency_questionnaire_designed_for_adolescents_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0002-8223(10)00528-6 DB - PRIME DP - Unbound Medicine ER -