Relative validity of a web-based food frequency questionnaire for Danish adolescents

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Relative validity of a web-based food frequency questionnaire for Danish adolescents. / Bjerregaard, Anne Ahrendt; Halldorsson, Thorhallur I; Kampmann, Freja Bach; Olsen, Sjurdur F; Tetens, Inge.

In: Nutrition Journal, Vol. 17, 9, 2018.

Research output: Contribution to journalJournal articleResearchpeer-review

Harvard

Bjerregaard, AA, Halldorsson, TI, Kampmann, FB, Olsen, SF & Tetens, I 2018, 'Relative validity of a web-based food frequency questionnaire for Danish adolescents', Nutrition Journal, vol. 17, 9. https://doi.org/10.1186/s12937-018-0312-7

APA

Bjerregaard, A. A., Halldorsson, T. I., Kampmann, F. B., Olsen, S. F., & Tetens, I. (2018). Relative validity of a web-based food frequency questionnaire for Danish adolescents. Nutrition Journal, 17, [9]. https://doi.org/10.1186/s12937-018-0312-7

Vancouver

Bjerregaard AA, Halldorsson TI, Kampmann FB, Olsen SF, Tetens I. Relative validity of a web-based food frequency questionnaire for Danish adolescents. Nutrition Journal. 2018;17. 9. https://doi.org/10.1186/s12937-018-0312-7

Author

Bjerregaard, Anne Ahrendt ; Halldorsson, Thorhallur I ; Kampmann, Freja Bach ; Olsen, Sjurdur F ; Tetens, Inge. / Relative validity of a web-based food frequency questionnaire for Danish adolescents. In: Nutrition Journal. 2018 ; Vol. 17.

Bibtex

@article{90e072f3335a4c559104810cba07f8da,
title = "Relative validity of a web-based food frequency questionnaire for Danish adolescents",
abstract = "BACKGROUND: With increased focus on dietary intake among youth and risk of diseases later in life, it is of importance, prior to assessing diet-disease relationships, to examine the validity of the dietary assessment tool. This study's objective was to evaluate the relative validity of a self-administered web-based FFQ among Danish children aged 12 to 15 years.METHODS: From a nested sub-cohort within the Danish National Birth Cohort, 124 adolescents participated. Four weeks after completion of the FFQ, adolescents were invited to complete three telephone-based 24HRs; administered 4 weeks apart. Mean or median intakes of nutrients and food groups estimated from the FFQ were compared with the mean of 3x24HRs. To assess the level of ranking we calculated the proportion of correctly classified into the same quartile, and the proportion of misclassified (into the opposite quartile). Spearman's correlation coefficients and de-attenuated coefficients were calculated to assess agreement between the FFQ and 24HRs.RESULTS: The mean percentage of all food groups, for adolescents classified into the same and opposite quartile was 35 and 7.5{\%}, respectively. Mean Spearman's correlation was 0.28 for food groups and 0.35 for nutrients, respectively. Adjustment for energy and within-person variation in the 24HRs had little effect on the magnitude of the correlations for food groups and nutrients. We found overestimation by the FFQ compared with the 24HRs for fish, fruits, vegetables, oils and dressing and underestimation by the FFQ for meat/poultry and sweets. Median intake of beverages, dairy, bread, cereals, the mean total energy and carbohydrate intake did not differ significantly between the two methods.CONCLUSION: The relative validity of the FFQ compared with the 3x24HRs showed that the ranking ability differed across food groups and nutrients with best ranking for estimated intake of dairy, fruits, and oils and dressing. Larger variation was observed for fish, sweets and vegetables. For nutrients, the ranking ability was acceptable for fatty acids and iron. When evaluating estimates from the FFQ among Danish adolescents these findings should be considered.",
keywords = "Dietary assessment, School-age children, Diet, Dietary intake, Cohort study, Food groups, Nutrients",
author = "Bjerregaard, {Anne Ahrendt} and Halldorsson, {Thorhallur I} and Kampmann, {Freja Bach} and Olsen, {Sjurdur F} and Inge Tetens",
note = "CURIS 2018 NEXS 026",
year = "2018",
doi = "10.1186/s12937-018-0312-7",
language = "English",
volume = "17",
journal = "Nutrition Journal",
issn = "1475-2891",
publisher = "BioMed Central",

}

RIS

TY - JOUR

T1 - Relative validity of a web-based food frequency questionnaire for Danish adolescents

AU - Bjerregaard, Anne Ahrendt

AU - Halldorsson, Thorhallur I

AU - Kampmann, Freja Bach

AU - Olsen, Sjurdur F

AU - Tetens, Inge

N1 - CURIS 2018 NEXS 026

PY - 2018

Y1 - 2018

N2 - BACKGROUND: With increased focus on dietary intake among youth and risk of diseases later in life, it is of importance, prior to assessing diet-disease relationships, to examine the validity of the dietary assessment tool. This study's objective was to evaluate the relative validity of a self-administered web-based FFQ among Danish children aged 12 to 15 years.METHODS: From a nested sub-cohort within the Danish National Birth Cohort, 124 adolescents participated. Four weeks after completion of the FFQ, adolescents were invited to complete three telephone-based 24HRs; administered 4 weeks apart. Mean or median intakes of nutrients and food groups estimated from the FFQ were compared with the mean of 3x24HRs. To assess the level of ranking we calculated the proportion of correctly classified into the same quartile, and the proportion of misclassified (into the opposite quartile). Spearman's correlation coefficients and de-attenuated coefficients were calculated to assess agreement between the FFQ and 24HRs.RESULTS: The mean percentage of all food groups, for adolescents classified into the same and opposite quartile was 35 and 7.5%, respectively. Mean Spearman's correlation was 0.28 for food groups and 0.35 for nutrients, respectively. Adjustment for energy and within-person variation in the 24HRs had little effect on the magnitude of the correlations for food groups and nutrients. We found overestimation by the FFQ compared with the 24HRs for fish, fruits, vegetables, oils and dressing and underestimation by the FFQ for meat/poultry and sweets. Median intake of beverages, dairy, bread, cereals, the mean total energy and carbohydrate intake did not differ significantly between the two methods.CONCLUSION: The relative validity of the FFQ compared with the 3x24HRs showed that the ranking ability differed across food groups and nutrients with best ranking for estimated intake of dairy, fruits, and oils and dressing. Larger variation was observed for fish, sweets and vegetables. For nutrients, the ranking ability was acceptable for fatty acids and iron. When evaluating estimates from the FFQ among Danish adolescents these findings should be considered.

AB - BACKGROUND: With increased focus on dietary intake among youth and risk of diseases later in life, it is of importance, prior to assessing diet-disease relationships, to examine the validity of the dietary assessment tool. This study's objective was to evaluate the relative validity of a self-administered web-based FFQ among Danish children aged 12 to 15 years.METHODS: From a nested sub-cohort within the Danish National Birth Cohort, 124 adolescents participated. Four weeks after completion of the FFQ, adolescents were invited to complete three telephone-based 24HRs; administered 4 weeks apart. Mean or median intakes of nutrients and food groups estimated from the FFQ were compared with the mean of 3x24HRs. To assess the level of ranking we calculated the proportion of correctly classified into the same quartile, and the proportion of misclassified (into the opposite quartile). Spearman's correlation coefficients and de-attenuated coefficients were calculated to assess agreement between the FFQ and 24HRs.RESULTS: The mean percentage of all food groups, for adolescents classified into the same and opposite quartile was 35 and 7.5%, respectively. Mean Spearman's correlation was 0.28 for food groups and 0.35 for nutrients, respectively. Adjustment for energy and within-person variation in the 24HRs had little effect on the magnitude of the correlations for food groups and nutrients. We found overestimation by the FFQ compared with the 24HRs for fish, fruits, vegetables, oils and dressing and underestimation by the FFQ for meat/poultry and sweets. Median intake of beverages, dairy, bread, cereals, the mean total energy and carbohydrate intake did not differ significantly between the two methods.CONCLUSION: The relative validity of the FFQ compared with the 3x24HRs showed that the ranking ability differed across food groups and nutrients with best ranking for estimated intake of dairy, fruits, and oils and dressing. Larger variation was observed for fish, sweets and vegetables. For nutrients, the ranking ability was acceptable for fatty acids and iron. When evaluating estimates from the FFQ among Danish adolescents these findings should be considered.

KW - Dietary assessment

KW - School-age children

KW - Diet

KW - Dietary intake

KW - Cohort study

KW - Food groups

KW - Nutrients

U2 - 10.1186/s12937-018-0312-7

DO - 10.1186/s12937-018-0312-7

M3 - Journal article

C2 - 29329542

VL - 17

JO - Nutrition Journal

JF - Nutrition Journal

SN - 1475-2891

M1 - 9

ER -

ID: 188448336