Table 2.

Maternal Plasma 25(OH)D Concentrations ¹ and Pregnancy Outcomes.

Outcome	Mean Difference (SE) 2	p
Gestational age at birth, weeks	0.01 (0.01)	0.41
Birth weight, grams	3.0 (1.6)	0.06
Weight-for-age z-score (WAZ)	0.01 (0.00)	0.035 *
Length-for-age z-score (LAZ)	0.00 (0.01)	0.70
Weight-for-length z-score (WLZ)	0.02 (0.01)	0.02 *
BMI z-score	0.01 (0.01)	0.14

Data are no. of offspring with the outcome/no. of offspring assessed (% of offspring with the outcome). SE, standard error. ¹ Maternal plasma 25(OH)D measured at enrollment; ² Data are the mean outcome difference per 1 nmol/L increase of plasma 25(OH)D concentration. The mean differences and corresponding p values were estimated from linear regression models; * Significant difference at p ≤ 0.05 level.