抄録
This paper reviews some of the representative epidemiological evidence for the relationship between sleep and
physical and mental health. Sleep has elements of quantity (sleep duration), quality, and rhythm, and the evidence
is summarized by focusing on abnormalities of each element. Regarding sleep duration, we present the results
of a systematic review and meta-analysis of short sleep duration and health outcomes. Similarly, the results of a
study on longer sleep duration and health outcomes are also presented. Regarding abnormalities in sleep rhythms,
a systematic review and meta-analysis of systematic reviews and meta-analyses conducted on shift work and various health outcomes are reviewed to examine the evidence. The relationship between sleep and mental health is
discussed in terms of the relationship between sleep and depression in previous epidemiological studies. Based
on the findings from these observational epidemiological studies, future research is expected to be based on sleep
hygiene education and intervention studies aimed at improving health by improving sleep.
