Objective: To analyze the factors associated with sleep disorders in patients diagnosed with recurrent depressive disorder.
Methods: A cross-sectional study was conducted on 150 patients treated at the National Institute of Mental Health – Bach Mai Hospital from August 2025 to March 2026.
Results: The majority of the patients were female, with 57.3% aged ≥40 years, and 73.3% were married. Hypertension was the most common physical comorbidity, accounting for 92.8% of the 42 patients with physical comorbidities. Overall, 48.0% of the patients had a current depressive episode with a duration of less than 3 months, and 89.3% had depression of at least severe severity. The prevalence of sleep disorders was 89.3%. Patients whose current depressive episode had lasted less than 3 months were at a higher risk of sleep disorders, with an odds ratio (OR) of 9.15 (95% CI: 1.68–49.75). Patients with severe depression were also at a higher risk of sleep disorders, with an OR of 5.03 (95% CI: 1.16–21.89)
Conclusion: Sleep disorders were highly prevalent among patients with recurrent depressive disorder. The duration of depression and the severity of depression were independent factors significantly associated with sleep disorders in this patient population.