Vitamin D Levels and Menstrual Cycle Length in Women with PCOS

Lijing Wang's cross-sectional study on figshare analyzes the association between serum vitamin D levels and menstrual cycle characteristics in women with polycystic ovary syndrome. The dataset includes measurements from 449 participants, stratified by vitamin D status, with clinical variables such as BMI, fasting glucose, insulin, and sex hormones. It was last updated on 2026-05-13.

Use Cases

• Assessing the association between vitamin D levels and menstrual cycle length based on the defined low and normal vitamin D groups.
• Modeling the non-linear relationship between vitamin D levels and the prevalence of prolonged cycles based on the identified inflection point of 27.76 ng/mL.
• Investigating the effect of covariates like BMI and HOMA-IR on the vitamin D-menstrual cycle link based on the adjusted regression analysis.
• Evaluating the potential clinical threshold for vitamin D sufficiency (28 ng/mL) in relation to cycle regularity in PCOS patients.

Strengths

• The dataset is derived from a study with 449 participants, providing a substantive sample size.
• Analysis includes adjustment for multiple covariates (age, BMI, HOMA-IR, total testosterone), suggesting a controlled approach.
• The study reports a specific quantitative finding: each 1 ng/mL increase in vitamin D was associated with a 9% reduction in the risk of prolonged cycles.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• The data is from a single cross-sectional study, which cannot establish causality.

Provenance

Source

Lijing Wang via figshare.

Collection Method

Cross-sectional study of 449 women diagnosed with PCOS, with clinical measurements and stratification by vitamin D levels.

Freshness

Last updated 2026-05-13 04:48:48; freshness should be verified.