Table 1

Participant baseline characteristics, overall and by treatment group
Characteristic Overall Placebo Vitamin D
(n = 160) (n = 80) (n = 80)
Age, yrs1 22.4 ± 3.5 22.4 ± 3.4 22.4 ± 3.5
Gestational age, weeks 27.8 ± 1.1 27.9 ± 1.0 27.6 ± 1.1
Marital status2
   Married 160 (100) 80 (100) 80 (100)
Level of education
   Primary school incomplete (<8 yrs) 102 (63.8) 50 (62.5) 52 (65.0)
   High school incomplete (> = 8 to <12 yrs) 49 (30.6) 27 (33.8) 22 (27.5)
   Graduate school (> = 12 yrs) 9 (5.7) 3 (3.8) 6 (7.5)
Primary occupation
   Homemaker 141 (88.1) 72 (90.0) 69 (86.3)
   Other 19 (11.9) 8 (10.2) 11 (14.0)
Number of pregnancies
   Median 1 1 1
   Range (Min, Max) (1, 5) (1, 4) (1, 5)
Number of live births
   Median 0 0 0
   Range (Min, Max) (0, 4) (0, 2) (0, 4)
Height, cm 150.3 ± 5.1 150.4 ± 5.4 150.3 ± 4.9
Weight, kg 52.0 ± 8.5 51.8 ± 9.1 52.2 ± 8.0
Body mass index (BMI) 23.0 ± 3.3 22.8 ± 3.5 22.1 ± 3.1

1 Mean ± standard deviation (SD).

2 n (%).

Roth et al.

Roth et al. Nutrition Journal 2013 12:47   doi:10.1186/1475-2891-12-47

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