Vitamin D Levels and Menstrual Cycle Length in Women with PCOS

A 2026 cross-sectional study by Lijing Wang analyzed 449 women diagnosed with polycystic ovary syndrome (PCOS). It measured serum vitamin D levels, body mass index, fasting glucose, insulin, and sex hormones to assess the association with menstrual cycle length. The data is available as a 16.8 KB DOCX file under a CC-BY-4.0 license.

Use Cases

• Assess the association between vitamin D levels and menstrual cycle regularity based on the described clinical measurements.
• Model the non-linear relationship between vitamin D and prolonged cycle prevalence using the identified inflection point of 27.76 ng/mL.
• Investigate potential confounding factors like BMI and insulin resistance (HOMA-IR) in the vitamin D-menstrual cycle link.
• Validate the reported 9% reduction in risk of prolonged cycles per 1 ng/mL increase in vitamin D.

Strengths

• Dataset includes measurements from 449 participants diagnosed with PCOS.
• Analysis identifies a specific inflection point (27.76 ng/mL) for the vitamin D-menstrual cycle relationship.
• Results are adjusted for multiple covariates including age, BMI, HOMA-IR, and total testosterone.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is from a single cross-sectional study, limiting causal inference.

Provenance

Source

Lijing Wang via figshare

Collection Method

Cross-sectional clinical study of 449 women with PCOS, measuring serum vitamin D, BMI, fasting glucose, insulin, and sex hormones.

Freshness

Last updated 2026-05-13 04:48:52; freshness should be verified.