Prevalence and influencing factors of vitamin D deficiency in women with polycystic ovary syndrome: a systematic review and meta-analysis (opens in new tab)

ObjectiveTo systematically evaluate the prevalence and influencing factors of vitamin D deficiency in women with polycystic ovary syndrome (PCOS), providing an evidence-based basis for vitamin D screening, nutritional intervention, and metabolic management in this population. Methods: Systematic searches were conducted in PubMed, Embase, Cochrane Library, Web of Science, and Scopus databases to identify studies on the prevalence and influencing factors of vitamin D deficiency in women with PC...