Weiler HA, Hazell TJ, Majnemer A, Vanstone CA, Gallo S, Rodd CJ. Vitamin D supplementation and gross motor development: A 3-year follow-up of a randomized trial.
Early Hum Dev 2022;
171:105615. [PMID:
35777122 DOI:
10.1016/j.earlhumdev.2022.105615]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 06/16/2022] [Indexed: 11/03/2022]
Abstract
BACKGROUND
Vitamin D status during pregnancy, early childhood and season-at-birth are implicated in gross motor development (GMD).
AIM
To test whether vitamin D intake in infancy and season-at-birth affect GMD in early childhood.
STUDY DESIGN
3-year follow up study of a single-center trial.
SUBJECTS
Healthy infants (n = 116) were allocated to 400 (standard-of-care), 800 or 1200 IU/day of vitamin D3 supplementation from 1 to 12 months; n = 70 returned for follow-up at 3-years.
OUTCOME MEASURES
The main outcome was GMD using the Peabody Developmental Motor Scales-2 which includes gross motor quotient (GMQ) and stationary, locomotion and object manipulation subtests.
RESULTS
GMQ scores were normal (≥85) in 94 %. An interaction between dosage group and season-at-birth (p = 0.01) was observed for GMQ and stationary standardized score; among winter/spring born children, the 1200 IU/d scored higher vs. 400 and 800 IU/d groups. Object manipulation standardized score was higher (p = 0.04) in children in the 1200 vs. 400 IU/d group, without interaction with season-at-birth.
CONCLUSIONS
GMD in young children who received 400 IU/d of supplemental vitamin D in infancy is not influenced by season-at-birth. This dose of vitamin D of 400 IU/d as recommended in North America adequately supports GMD. The modest enhancement in GMD with 1200 IU/d in winter/spring born children requires further study.
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