Table 3 The mean 25(OH)D levels by season after stratification by age and by women’s employment status (mean ± SD ng/mL)
From: Serum 25 hydroxyvitamin D levels and affecting factors among preconception fertile women
Season | Employment status | Age | ||
|---|---|---|---|---|
Working (n = 285) | Non-working (n = 57) | 22–30 years (n = 241) | 31–44 years (n = 101) | |
Spring | 13.7 ± 4.6 | 17.3 ± 5.8 | 14.5 ± 5.0 | 14.7 ± 5.5 |
Summer | 16.4 ± 4.9 | 17.7 ± 5.5 | 16.1 ± 4.9 | 17.5 ± 5.1 |
Autumn | 15.9 ± 5.6 | 15.6 ± 5.7 | 15.7 ± 5.1 | 16.3 ± 6.7 |
Winter | 11.5 ± 4.6 | 13.8 ± 6.0 | 11.0 ± 3.8 | 13.6 ± 6.5 |
F | 17.013 | 1.384 | 15.655 | 2.664 |
p | 0.000 | 0.256 | 0.000 | 0.051 |