Relationship between mid-sleep time and depression, health-related quality of life, and sleep deprivation in the 2018 Korea Community Health Survey

ABSTRACT

This cross-sectional study examined the relationship of mid-sleep time (MST) with depression, quality of life, and sleep deprivation. This study included 173 284 adults aged ≥ 19 years who participated in the 2018 Korea Community Health Survey. The Patient Health Questionnaire-9 for depression, EuroQol-5 dimension for health-related quality of life, and the Pittsburgh Sleep Quality Index for MST, daytime sleepiness, and sleep quality were used. Regression and logistic regression analysis was used for complex sample analysis. The results showed that individuals with later MST had a higher risk of depression, poor quality of life, poor sleep quality, and excessive daytime sleepiness than intermediate-type individuals, whereas earlier MST was associated with good sleep quality in the total population. This association was significant in both men and women. The later type was associated with all items of health-related quality of life in both men and women. These findings suggest that the later type is a significant predictor of mental health, quality of life, sleep quality, and daytime sleepiness. Identifying an individual’s mid-sleep time may help tailor interventions and treatment strategies that optimize sleep, mental health outcomes, and quality of life.

KEYWORDS:

• Mid-sleep
• depression
• quality of life
• sleep disorders
• sleep quality
• chronotype

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data availability statement

The data are freely available on the website (https://chs.kdca.go.kr/chs/rdr/rdrInfoProcessMain.do (accessed on 22 June 2023)).

All the subjects have provided appropriate informed consent.

Institutional review board statement

The study protocol was approved by the Institutional Review Board (IRB) of Soonchunhyang University (reference number: 202303-SB-017-01).

Supplementary material

Supplemental data for this article can be accessed online at https://doi.org/10.1080/07420528.2023.2294049

Additional information

Funding

This work was supported by the Soonchunhyang University Research Fund [No. 20230659].