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Table 2 Means age and depression score, sun exposure and seasons in the participants with 25-hydroxyvitamin D concentrations of <20 and ≥ 20 ng/mL

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

Variables Serum 25 (OH) D (ng/ml) p-value
<20 ≥20
Age (years), mean ± sd 28.45 ± 4.62 25.32 ± 4.39 0.31
Depression score at baseline, mean ± sd 8.34 ± 3.82 9.37 ± 3.94 0.31
Sun exposure, N (%)    <0.001
  < 60 m 105 (89.7 %) 8 (44.4 %)  
  ≥ 60 m 12 (10.3 %) 10 (55.6 %)
Season, N (%)    0.05
 Spring 24 (75 %) 8 (25 %)  
 Summer 16 (88.9 %) 2 (11.1 %)
 Winter 94 (91.3 %) 9 (8.7 %)