Association Between Polycystic Ovary Syndrome and Sleep Quality: A Questionnaire-Based Study

This cross-sectional study enrolled 310 women with PCOS (Rotterdam criteria) at a tertiary referral center between September 2025 and January 2026. Sleep quality was assessed using the Pittsburgh Sleep Quality Index (PSQI); a global score \>5 defined poor sleep quality. Logistic regression and Spearman correlation analyses were performed to identify independent predictors.

Inclusion Criteria: * Women aged 18 to 45 years * Diagnosis of polycystic ovary syndrome according to the Rotterdam criteria, after exclusion of other causes of hyperandrogenism and ovulatory dysfunction (congenital adrenal hyperplasia, androgen-secreting tumors, Cushing's syndrome, hyperprolactinemia and thyroid dysfunction) * Voluntary participation with written informed consent Exclusion Criteria: * Previously diagnosed primary sleep disorder (e.g., obstructive sleep apnea, narcolepsy) * Any previously diagnosed psychiatric disorder (including depression and anxiety disorders) or current psychiatric treatment * History of severe systemic disease (e.g., chronic kidney failure, liver disease)