Dietary Magnesium, Vitamin D, and Animal Protein Intake and Their Association to the Linear Growth Trajectory of Children from Birth to 24 Months of Age: Results From MAL-ED Birth Cohort Study Conducted in Dhaka, Bangladesh.

BACKGROUND

Evidence suggests lack of understanding of the association of specific nutrients with different time points of linear growth trajectory.

OBJECTIVE

We investigated the role of dietary macro- and micronutrients on length-for-age z (LAZ) score trajectory of children across first 24 months of their life.

METHODS

The MAL-ED Bangladesh birth cohort study recruited 265 healthy newborn children after birth. The linear growth trajectory of those children was modeled using latent growth curve modeling (LGCM) technique.

RESULTS

Dietary magnesium intake at 9 to 11 months was positively associated (coefficient β = 0.006, < .02) with LAZ at 12 months. Animal protein intake at 15 to 17 months, in turn, was positively associated (β = 0.03, < .03) with LAZ at 18 months. However, vitamin D intake at 15 to 17 months was negatively associated (β = -0.06, < .02) with LAZ at 18 months. Other micro- and macronutrients did not show any statistically significant association with the linear growth trajectory. We also found that birth weight (β = 0.91, < .01), treating water (β = 0.35, < 0.00), and maternal height (β = 3.4, < .00) were positively associated with intercept. Gender had a significant negative association with the intercept, but a positive association with the slope (β = -0.39, < .01; β = 0.08, < .04), respectively. Conversely, birth weight had negative association with the slope (β = -0.12, < .01).

CONCLUSIONS

Dietary magnesium and animal protein were positively and vitamin D was negatively associated with the linear growth trajectory. Maternal height, birth weight, gender, and treatment of drinking water also played significant roles in directing the trajectory.