Accuracy of self-reported intake of signature foods in a school meal intervention study: comparison between control and intervention period

Anja Biltoft-Jensen; Camilla Trab Damsgaard; Rikke Andersen; Karin Hess Ygil; Elisabeth Wreford Andersen; Majken Ege; Tue Christensen; Louise Bergmann Sørensen; Ken D Stark; Inge Tetens; Anne-Vibeke Thorsen

doi:10.1017/s0007114515002020

Accuracy of self-reported intake of signature foods in a school meal intervention study: comparison between control and intervention period

Anja Biltoft-Jensen, Camilla Trab Damsgaard, Rikke Andersen, Karin Hess Ygil, Elisabeth Wreford Andersen, Majken Ege, Tue Christensen, Louise Bergmann Sørensen, Ken D Stark, Inge Tetens, Anne-Vibeke Thorsen

Lifecourse Nutrition & Health

10 Citations (Scopus)

Abstract

Bias in self-reported dietary intake is important when evaluating the effect of dietary interventions, particularly for intervention foods. However, few have investigated this in children, and none have investigated the reporting accuracy of fish intake in children using biomarkers. In a Danish school meal study, 8- to 11-year-old children (n 834) were served the New Nordic Diet (NND) for lunch. The present study examined the accuracy of self-reported intake of signature foods (berries, cabbage, root vegetables, legumes, herbs, potatoes, wild plants, mushrooms, nuts and fish) characterising the NND. Children, assisted by parents, self-reported their diet in a Web-based Dietary Assessment Software for Children during the intervention and control (packed lunch) periods. The reported fish intake by children was compared with their ranking according to fasting whole-blood EPA and DHA concentration and weight percentage using the Spearman correlations and cross-classification. Direct observation of school lunch intake (n 193) was used to score the accuracy of food-reporting as matches, intrusions, omissions and faults. The reporting of all lunch foods had higher percentage of matches compared with the reporting of signature foods in both periods, and the accuracy was higher during the control period compared with the intervention period. Both Spearman's rank correlations and linear mixed models demonstrated positive associations between EPA+DHA and reported fish intake. The direct observations showed that both reported and real intake of signature foods did increase during the intervention period. In conclusion, the self-reported data represented a true increase in the intake of signature foods and can be used to examine dietary intervention effects.

Original language	English
Journal	British Journal of Nutrition
Volume	114
Issue number	4
Pages (from-to)	635-644
Number of pages	10
ISSN	0007-1145
DOIs	https://doi.org/10.1017/s0007114515002020
Publication status	Published - 28 Aug 2015

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Biltoft-Jensen, A., Damsgaard, C. T., Andersen, R., Ygil, K. H., Andersen, E. W., Ege, M., Christensen, T., Sørensen, L. B., Stark, K. D., Tetens, I., & Thorsen, A-V. (2015). Accuracy of self-reported intake of signature foods in a school meal intervention study: comparison between control and intervention period. British Journal of Nutrition, 114(4), 635-644. https://doi.org/10.1017/s0007114515002020

Accuracy of self-reported intake of signature foods in a school meal intervention study : comparison between control and intervention period. / Biltoft-Jensen, Anja; Damsgaard, Camilla Trab; Andersen, Rikke et al.

In: British Journal of Nutrition, Vol. 114, No. 4, 28.08.2015, p. 635-644.

Research output: Contribution to journal › Journal article › Research › peer-review

Biltoft-Jensen, A, Damsgaard, CT, Andersen, R, Ygil, KH, Andersen, EW, Ege, M, Christensen, T, Sørensen, LB, Stark, KD, Tetens, I & Thorsen, A-V 2015, 'Accuracy of self-reported intake of signature foods in a school meal intervention study: comparison between control and intervention period', British Journal of Nutrition, vol. 114, no. 4, pp. 635-644. https://doi.org/10.1017/s0007114515002020

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abstract = "Bias in self-reported dietary intake is important when evaluating the effect of dietary interventions, particularly for intervention foods. However, few have investigated this in children, and none have investigated the reporting accuracy of fish intake in children using biomarkers. In a Danish school meal study, 8- to 11-year-old children (n 834) were served the New Nordic Diet (NND) for lunch. The present study examined the accuracy of self-reported intake of signature foods (berries, cabbage, root vegetables, legumes, herbs, potatoes, wild plants, mushrooms, nuts and fish) characterising the NND. Children, assisted by parents, self-reported their diet in a Web-based Dietary Assessment Software for Children during the intervention and control (packed lunch) periods. The reported fish intake by children was compared with their ranking according to fasting whole-blood EPA and DHA concentration and weight percentage using the Spearman correlations and cross-classification. Direct observation of school lunch intake (n 193) was used to score the accuracy of food-reporting as matches, intrusions, omissions and faults. The reporting of all lunch foods had higher percentage of matches compared with the reporting of signature foods in both periods, and the accuracy was higher during the control period compared with the intervention period. Both Spearman's rank correlations and linear mixed models demonstrated positive associations between EPA+DHA and reported fish intake. The direct observations showed that both reported and real intake of signature foods did increase during the intervention period. In conclusion, the self-reported data represented a true increase in the intake of signature foods and can be used to examine dietary intervention effects.",

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AU - Biltoft-Jensen, Anja

AU - Damsgaard, Camilla Trab

AU - Andersen, Rikke

AU - Ygil, Karin Hess

AU - Andersen, Elisabeth Wreford

AU - Ege, Majken

AU - Christensen, Tue

AU - Sørensen, Louise Bergmann

AU - Stark, Ken D

AU - Tetens, Inge

AU - Thorsen, Anne-Vibeke

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N2 - Bias in self-reported dietary intake is important when evaluating the effect of dietary interventions, particularly for intervention foods. However, few have investigated this in children, and none have investigated the reporting accuracy of fish intake in children using biomarkers. In a Danish school meal study, 8- to 11-year-old children (n 834) were served the New Nordic Diet (NND) for lunch. The present study examined the accuracy of self-reported intake of signature foods (berries, cabbage, root vegetables, legumes, herbs, potatoes, wild plants, mushrooms, nuts and fish) characterising the NND. Children, assisted by parents, self-reported their diet in a Web-based Dietary Assessment Software for Children during the intervention and control (packed lunch) periods. The reported fish intake by children was compared with their ranking according to fasting whole-blood EPA and DHA concentration and weight percentage using the Spearman correlations and cross-classification. Direct observation of school lunch intake (n 193) was used to score the accuracy of food-reporting as matches, intrusions, omissions and faults. The reporting of all lunch foods had higher percentage of matches compared with the reporting of signature foods in both periods, and the accuracy was higher during the control period compared with the intervention period. Both Spearman's rank correlations and linear mixed models demonstrated positive associations between EPA+DHA and reported fish intake. The direct observations showed that both reported and real intake of signature foods did increase during the intervention period. In conclusion, the self-reported data represented a true increase in the intake of signature foods and can be used to examine dietary intervention effects.

AB - Bias in self-reported dietary intake is important when evaluating the effect of dietary interventions, particularly for intervention foods. However, few have investigated this in children, and none have investigated the reporting accuracy of fish intake in children using biomarkers. In a Danish school meal study, 8- to 11-year-old children (n 834) were served the New Nordic Diet (NND) for lunch. The present study examined the accuracy of self-reported intake of signature foods (berries, cabbage, root vegetables, legumes, herbs, potatoes, wild plants, mushrooms, nuts and fish) characterising the NND. Children, assisted by parents, self-reported their diet in a Web-based Dietary Assessment Software for Children during the intervention and control (packed lunch) periods. The reported fish intake by children was compared with their ranking according to fasting whole-blood EPA and DHA concentration and weight percentage using the Spearman correlations and cross-classification. Direct observation of school lunch intake (n 193) was used to score the accuracy of food-reporting as matches, intrusions, omissions and faults. The reporting of all lunch foods had higher percentage of matches compared with the reporting of signature foods in both periods, and the accuracy was higher during the control period compared with the intervention period. Both Spearman's rank correlations and linear mixed models demonstrated positive associations between EPA+DHA and reported fish intake. The direct observations showed that both reported and real intake of signature foods did increase during the intervention period. In conclusion, the self-reported data represented a true increase in the intake of signature foods and can be used to examine dietary intervention effects.

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EP - 644

JO - British Journal of Nutrition

JF - British Journal of Nutrition

IS - 4

ER -

Accuracy of self-reported intake of signature foods in a school meal intervention study: comparison between control and intervention period

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