Abstract | OBJECTIVES: To examine the associations between maternal vitamin D intake and childhood growth and risk of overweight up to 8 years. We further examined the effect modification by maternal prepregnancy body mass index (BMI). DESIGN: Prospective population-based pregnancy cohort study. SETTING: The Norwegian Mother, Father and Child Cohort Study. PARTICIPANTS: In total, 58 724 mothers and 66 840 singleton children, with information on maternal vitamin D intake during the pregnancy and minimum one postnatal anthropometric measurement. OUTCOME MEASURES: Predicted weight and height growth trajectories and velocities from 1 month to 8 years, rapid growth during infancy and toddlerhood, and risk of overweight in preschool and school age. RESULTS: Overall, maternal vitamin D intake was associated with lower weight trajectory, lower odds of rapid weight growth and higher odds of childhood overweight. In children of mothers with prepregnancy normal weight, maternal vitamin D intake was negatively associated with weight trajectory and lower OR of a rapid weight growth during the first year, compared with reference (<5 µg/day). Children of mothers with normal weight, with maternal vitamin D intakes of 10-15 and >15 µg/day, also had 0.86 (95% CI 0.77 to 0.97) and 0.88 (95% CI 0.79 to 0.99) lower odds for overweight at 3 years, compared with reference. In contrast, in children of mothers with prepregnancy overweight (BMI ≥25 kg/m2), vitamin D intake was positively associated with weight trajectory. Children of mothers with overweight, with maternal vitamin D intake of 5-9.9 µg/day, also had (1.09 (95% CI 1.01 to 1.18) and 1.12 (95% CI 1.02 to 1.23)) higher odds for overweight at 5 years and 8 years, compared with reference. CONCLUSIONS: Maternal vitamin D intake affects postnatal growth and is inversely associated with childhood overweight in children of mothers with normal weight. Associations between maternal vitamin D intake and child growth and risk of overweight varied by prepregnancy BMI.
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Authors | Anna Amberntsson, Eleni Papadopoulou, Anna Winkvist, Lauren Lissner, Helle Margrete Meltzer, Anne Lise Brantsaeter, Hanna Augustin |
Journal | BMJ open
(BMJ Open)
Vol. 11
Issue 10
Pg. e048980
(10 01 2021)
ISSN: 2044-6055 [Electronic] England |
PMID | 34598984
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | © Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY. Published by BMJ. |
Chemical References |
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Topics |
- Birth Weight
- Body Mass Index
- Child
- Child, Preschool
- Cohort Studies
- Female
- Humans
- Mothers
- Overweight
(epidemiology)
- Pregnancy
- Prospective Studies
- Vitamin D
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