Reproducibility of a web-based FFQ for 13- to 15-year-old Danish adolescents
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Reproducibility of a web-based FFQ for 13- to 15-year-old Danish adolescents. / Bjerregaard, Anne A.; Tetens, Inge; Olsen, Sjurdur F.; Halldorsson, Thorhallur I.
In: Journal of Nutritional Science, Vol. 5, e5, 2016.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Reproducibility of a web-based FFQ for 13- to 15-year-old Danish adolescents
AU - Bjerregaard, Anne A.
AU - Tetens, Inge
AU - Olsen, Sjurdur F.
AU - Halldorsson, Thorhallur I.
PY - 2016
Y1 - 2016
N2 - FFQ are widely used in large-scale studies to assess dietary intake. To aid interpretation of diet-disease associations assessment of validity must be performed. Reproducibility is one aspect of validity focusing on the stability of repeated assessment with the same method which may also reveal problems in instrument design or participant instructions. The aim of the present study was to evaluate the reproducibility of a web-based FFQ targeting Danish adolescents within the Danish National Birth Cohort (DNBC). Data for the present study were obtained from a prospective design nested within the DNBC. Adolescents aged 13 to 15 years old (n 48, 60 % girls) completed the FFQ twice 4 weeks apart. The proportion of adolescents consistently classified into the same tertile according to amount of food intake ranged from 45 % (fish) to 77 % (vegetables), whereas classification into opposite tertiles ranged from 0 % (fruit, oils and dressing) to 15 % (beverages). Overall, no significant differences were observed in intake of food groups or nutrients between the two completions of the FFQ. Mean crude Spearman correlation for all food groups was 0·56 and mean intra-class correlation for all food groups was 0·61. In conclusion, the reproducibility of the FFQ for Danish adolescents was acceptable. The study revealed that adolescents aged 13-15 years seemed capable of recalling consistently overall dietary habits and had some difficulties estimating the frequency of consumption of regularly consumed food items.
AB - FFQ are widely used in large-scale studies to assess dietary intake. To aid interpretation of diet-disease associations assessment of validity must be performed. Reproducibility is one aspect of validity focusing on the stability of repeated assessment with the same method which may also reveal problems in instrument design or participant instructions. The aim of the present study was to evaluate the reproducibility of a web-based FFQ targeting Danish adolescents within the Danish National Birth Cohort (DNBC). Data for the present study were obtained from a prospective design nested within the DNBC. Adolescents aged 13 to 15 years old (n 48, 60 % girls) completed the FFQ twice 4 weeks apart. The proportion of adolescents consistently classified into the same tertile according to amount of food intake ranged from 45 % (fish) to 77 % (vegetables), whereas classification into opposite tertiles ranged from 0 % (fruit, oils and dressing) to 15 % (beverages). Overall, no significant differences were observed in intake of food groups or nutrients between the two completions of the FFQ. Mean crude Spearman correlation for all food groups was 0·56 and mean intra-class correlation for all food groups was 0·61. In conclusion, the reproducibility of the FFQ for Danish adolescents was acceptable. The study revealed that adolescents aged 13-15 years seemed capable of recalling consistently overall dietary habits and had some difficulties estimating the frequency of consumption of regularly consumed food items.
KW - Adolescents
KW - Dietary assessment
KW - FFQ
KW - GDM, gestational diabetes mellitus
KW - ICC, intra-class correlation coefficient
KW - Reproducibility
KW - Web-based FFQ
U2 - 10.1017/jns.2015.39
DO - 10.1017/jns.2015.39
M3 - Journal article
C2 - 26855775
VL - 5
JO - Journal of Nutritional Science
JF - Journal of Nutritional Science
SN - 2048-6790
M1 - e5
ER -
ID: 172803206