ALPHA PSYCHIATRY
Original Articles

Associations Between Delayed Sleep Phase Syndrome and Daytime Napping with the Metabolic Syndrome Among Adults: Results from the Ravansar Non-Communicable Disease (RaNCD) Cohort Study

1.

Department of Internal Medicine, Kermanshah University of Medical Sciences Faculty of Medicine, Kermanshah, Iran

2.

Sleep Disorders Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran

3.

Social Development and Health Promotion Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran

4.

Department of Anesthesiology, Critical Care and Pain Management, Kermanshah University of Medical Sciences, Imam Reza Hospital, Kermanshah, Iran

5.

Division of Family Medicine and Primary Care, Department of Caring Science and Society, Karolinska Institute, Stockholm, Sweden

6.

Medical Education Development Center, Kermanshah University of Medical Sciences, Kermanshah, Iran

7.

Department of Psychology, Stanford University, Stanford, USA

8.

Center for Affective, Stress and Sleep Disorders, Psychiatric Hospital of the University of Basel, Basel, Switzerland

9.

Division of Sport Science and Psychosocial Health, Department of Sport, Exercise and Health, University of Basel, Basel, Switzerland

10.

Substance Abuse Prevention Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran

11.

Tehran University of Medical Sciences School of Medicine, Tehran, Iran

Alpha Psychiatry 2024; 25: 705-712
DOI: 10.5152/alphapsychiatry.2024.241565
Read: 69 Downloads: 36 Published: 13 December 2024

Objective: Adverse sleep and wake patterns are associated with physical health com- plaints, including metabolic disorders. The aim of this study was to evaluate the relation- ship between delayed sleep phase syndrome (DSPS) and napping during the day with metabolic syndrome (MetS).

Methods: This study was conducted on 10 065 participants aged 35-65 years using base- line data from the Ravansar Non-Communicable Disease (RaNCD) cohort study. Delayed sleep phase syndrome was evaluated through a clinical interview to rule out the possi- bility that the sleep complaints were a result of psychiatric disorders. Logistic and linear regression models were used to determine associations.

Results: The severity of MetS was found to be higher in men, older age groups, married people, subjects with a lower education level, urban residents, smokers, people with low physical activity, and DSPS. In the fully adjusted model, the odds of having MetS were 26% (95% Confidence interval (CI): 1.08, 1.48) higher in those with DSPS compared to those without DSPS. Additionally, the odds of MetS were 18% higher in people who napped less than 1 hour per day, 26% higher in those who napped 1-2 hours per day, and 21% higher in those who napped over 2 hours per day, compared to non-nappers. All of these associa- tions were statistically significant. The odds of having the severity of MetS were signifi- cantly 6% (95% CI: 0.01, 0.12) higher in those with DSPS compared to those without DSPS.

Conclusion: The findings of this study indicate that DSPS and daytime napping are associ- ated with an increased risk of MetS. Interventions aimed at improving sleep quality are recommended as potential strategies to help reduce the risk of developing MetS.

Cite this article as: Hemati N, Alipourian A, Moradinazar M, et al. Associations between delayed sleep phase syndrome and daytime napping with the metabolic syndrome among adults; results from the Ravansar non-communicable disease (RaNCD) cohort study. Alpha Psychiatry. 2024;25(6):705-712.

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