The association between serum vitamin D and sleep in health care workers cohort in Tabriz University of medical sciences

Abstract

The prevalence of poor sleep quality is high among adults, representing a paramount public health concern. This issue is particularly prominent among healthcare workers. Studies have reported the positive role of vitamin D in various aspects of quality of life. We aimed to evaluate the potential link between serum vitamin D and sleep quality. Methods: This cross-sectional study used data from healthcare workers enrolled in the Azar Cohort Study. Demographic and anthropometric measurements of 1,429 subjects were evaluated. Moreover, sleep quality and serum vitamin D of participants were assessed by the Pittsburgh Sleep Questionnaire Inventory (PSQI) and MONOBIND enzyme immunoassay kits, respectively. We also made use of ordinal logistic regression to assess for any links between PSQI components and vitamin D status. Results: The prevalence of vitamin D deficiency and insufficiency in our participants was 49.5% and 26.6%, respectively. Generally, 90.3% of the participants rated their sleep as fairly good or very good. Across all participants, the mean PSQI score was 4.69 ± 2.5. We observed that only a small number of participants had sleep latencies >60 min (4.3%) or daytime dysfunction ≥thrice/week (1.5%). According to ordinal regression findings, there was no significant association between vitamin D levels and PSQI components.