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Table 3 Between groups comparisons of depression scores and 25(OH)D concentrations

From: A randomized controlled trial of vitamin D supplementation on perinatal depression: in Iranian pregnant mothers

Variables mean ± sd Depression score, N (%)
  Vitamin D group Control group P-value Vitamin D group Control group
     <9 9–13 >13 <9 9–13 >13 P-value*
Depression score at baseline 8.44 ± 3.89 8.64 ± 3.81 0.747 37 (49.3) 38 (50.7) 0 (0) 33 (42.3) 45 (57.7) 0 (0) 0.383
Depression score at 38–40w gestation 6.17 ± 3.47 7.77 ± 3.92 0.01 49 (72.1) 18 (26.5) 1 (1.5) 37 (50.7) 30 (41.1) 6 (8.2) 0.024
Depression score at post partum (4w) 4.59 ± 3.29 7.36 ± 4.27 <0.001 58 (90.6) 6 (9.4) 0 (0) 43 (59.7) 23 (31.9) 6 (8.3) <0.001
Depression score at postpartum (8w) 4.19 ± 3.76 7.18 ± 3.99 <0.001 57 (89.1) 7 (10.9) 0 (0) 46 (63.9) 22 (30.6) 4 (5.6) 0.001
     Categorized 25(OH)D, N(%)
<20 20–29 ≥30 <20 20–29 ≥30 P-value*
25(OH)D at baseline (ng/mL) 12.84 ± 7.91 11.89 ± 6.40 0.63a 65 (86.7) 7 (9.3) 3 (4) 69 (88.5) 8 (10.3) 1 (1.3) 0.61
25(OH)D at delivery (ng/mL) 17.46 ± 10.09 12.07 ± 5.98 0.001a 41 (66.1) 15 (24.2) 6 (9.7) 58 (85.3) 10 (14.7) 0 (0) 0.006
  1. *Fisher’s Exact Test
  2. aMann-Whitney U test