24 February 2026 : Clinical Research
Effects of Age, Season, and Pregnancy History on Vitamin D Status in Women Seeking Preconception Care
Manyu Wu BCDEF 1,2, Dan Liu ABCDEF 1*DOI: 10.12659/MSM.950280
Med Sci Monit 2026; 32:e950280
Table 3 Comparison of 25(OH)D levels and vitamin D deficiency rates among Women Undergoing Preconception Care with adverse pregnancy history [median (P25, P75)].
| Adverse pregnancy history | N | 25(OH)D (ng/mL) | Vitamin D deficiency (n/%) |
|---|---|---|---|
| No adverse pregnancy history | 825 | 17.55 (14.20, 21.23) | 556 (67.39) |
| With adverse pregnancy history | 225 | 19.19 (15.72, 23.77) | 129 (57.33) |
| Z-value/χ value | −4.060 | 7.890 | |
| <0.001 | 0.005 |