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 1 Comparison of 25(OH)D levels and Vitamin D deficiency rates among women undergoing preconception care in different age groups [M(P25, P75)].
| Age (year) | N | 25(OH)D (ng/mL) | Vitamin D deficiency (n/%) |
|---|---|---|---|
| 20~29 | 535 | 16.98 (13.96, 20.96) | 375 (70.09) |
| 30~39 | 488 | 18.65 (15.20, 22.48) | 301 (61.68) |
| ≥40 | 27 | 22.33 (17.86, 26.40) | 9 (33.33) |
| H value/χ value | 30.579 | 20.404 | |
| <0.001 | <0.001 |