Vitamin D Levels and Menstrual Cycle Length in Women with PCOS

A cross-sectional study of 449 women diagnosed with polycystic ovary syndrome (PCOS). The data, authored by Lijing Wang and last updated in May 2026, includes measurements of serum vitamin D, body mass index, fasting plasma glucose, fasting insulin, and sex hormones to assess associations with menstrual cycle characteristics.

Use Cases

• Assessing the association between vitamin D levels and prolonged menstrual cycles based on the study's stratification and regression results.
• Modeling the non-linear relationship between vitamin D and cycle prevalence using the identified inflection point of 27.76 ng/mL.
• Investigating potential confounding factors like BMI, HOMA-IR, and total testosterone in the context of PCOS.
• Exploring the prevalence of prolonged cycles (over 35 days) within a clinical PCOS cohort.

Strengths

• Includes data from 449 participants, providing a substantial sample size for a clinical study.
• Reports specific, statistically significant findings, such as an 87.2% prevalence of prolonged cycles in the low vitamin D group.
• Identifies a concrete inflection point (27.76 ng/mL) for the relationship between vitamin D levels and cycle prevalence.

Limitations

• Row count is unknown, which may limit suitability assessment for large-scale modeling.
• Column-level documentation is absent; field semantics must be inferred after download.
• The data is from a single cross-sectional study, which limits causal inference.

Provenance

Source

Lijing Wang via figshare

Collection Method

Cross-sectional clinical study of 449 women diagnosed with PCOS.

Freshness

Last updated 2026-05-13 04:48:57; freshness should be verified.