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. Author manuscript; available in PMC: 2016 May 1.
Published in final edited form as: Ann Hum Biol. 2014 Sep 30;42(3):215–222. doi: 10.3109/03014460.2014.954616

Figure 1.

Figure 1

Association of maternal vitamin D status at ≤26 weeks gestation with weight-for-age (a) and BMI-for-age (b) z-scores over the first year of life, Collaborative Perinatal Project, 1959–1965. Maternal vitamin D status was expressed using four categories. Mixed effects linear regression model were adjusted for study site, mother and child specified as random effects; and 25(OH)D, infant age, infant sex, maternal BMI, maternal socioeconomic status, maternal race, season of maternal blood draw and breastfeeding specified as fixed effects. Interaction terms for infant age (continuous) and 25(OH)D (categorical) were significant for both WAZ (p = 0.03) and BMIZ (p = 0.04). For WAZ, there were no significant differences by maternal vitamin D status by the 8-month measurement point. For BMIZ, there were no significant differences by maternal vitamin D status by the 4-month measurement point.