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Nutrients. 2017 Jun 30;9(7). pii: E682. doi: 10.3390/nu9070682.

A Validation Study of an Interviewer-Administered Short Food Frequency Questionnaire in Assessing Dietary Vitamin D and Calcium Intake in Swedish Children.

Author information

1
Department of Clinical Sciences, Paediatrics, Lund University, SE-22100 Lund, Sweden. Lotta.Soderberg@skane.se.
2
Department of Clinical Sciences/Pediatrics, Umeå University, SE-90185 Umeå, Sweden. torbjorn.lind@umu.se.
3
Department of Clinical Sciences, Paediatrics, Lund University, SE-22100 Lund, Sweden. pia.karlsland_akeson@med.lu.se.
4
Department of Clinical Sciences/Pediatrics, Umeå University, SE-90185 Umeå, Sweden. Ann-Kristin.M.Sandstrom@vll.se.
5
Department of Clinical Sciences/Pediatrics, Umeå University, SE-90185 Umeå, Sweden. olle.hernell@umu.se.
6
Department of Clinical Sciences/Pediatrics, Umeå University, SE-90185 Umeå, Sweden. inger.ohlund@umu.se.

Abstract

Vitamin D and calcium are essential nutrients with a range of biological effects of public health relevance. This study aimed to validate a short food frequency questionnaire (SFFQ) against a three-day food record (3D record), assessing the intake of vitamin D and calcium in Swedish children during wintertime. In a double-blinded, randomized food-based intervention study on the effect of feeding different daily doses of vitamin D supplement to 5-7-year-old children (n = 85), 79 (93%) participants completed SFFQ1 at baseline and SFFQ2 after the intervention, and 72 were informed to fill in a 3D record. The 28 (39%) children who completed the 3D record were included in this validation study. The baseline level of serum-25 hydroxy vitamin D [S-25(OH)D] was used as a biomarker. The correlation between all three instruments were moderate to strong. SFFQ2 and the 3D record correlated moderately to S-25(OH)D. Bland-Altman analysis showed that SFFQ2 overestimated vitamin D intake by on average 0.6 μg/day, (limits of agreement (LOA) 5.7 and -4.6 μg/day), whereas the intake of calcium was underestimated by on average 29 mg/day, (LOA 808 and -865 mg/day). Finally, the validity coefficient calculated for vitamin D using the method of triad was high (0.75). In conclusion, this SFFQ, assessed by a dietician, is a valid tool to assess dietary vitamin D and calcium intake in groups of young children.

KEYWORDS:

25-hydroxy vitamin D; child; dietary assessments; three-day food record

PMID:
28665354
PMCID:
PMC5537797
DOI:
10.3390/nu9070682
[Indexed for MEDLINE]
Free PMC Article

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