Objectives@#The aim of this study was to examine the
association between the
sleep pattern,
chronotype (midpoint of
sleep on free days) and the
depressive symptoms in
adults aged 19 years and over in
Korea. This study also investigated the
mediating effect of perceived usual stress (
PUS) and
self-rated
health (SRH) on the
association between
chronotype and
depressive symptoms. @*
Methods@#Among the subjects of the 7th
Korea National Health and Nutrition Examination Survey (KNHANES) 2016 and 2018, 16142
adults aged 19 or over responded to the
survey and finally 8604 were analyzed according to the exclusion conditions.
Logistic regression analysis was conducted to see the
risk of
depressive symptoms,
suicidal ideation over
sleep pattern,
chronotype. Finally,
mediation analysis was performed in order to clarify how
PUS and SRH are associated to chronoytpe and
depression. @*Results@#After controlling for potential covariates, weekly
sleep duration < 5 hours, ≥ 10 hours was associated with
depressive symptoms. And late
bed time sleeping after am 100 and later midpoints of
sleep was associated with a higher level of
depressive symptoms. Additionally, the
PUS and SRH between
chronotype and
depressive symptoms showed a serial multiple
mediation effect. @*Conclusions@#Short or long
sleep duration, late
bed time and later midpoints of
sleep on free days are associated with
depressive symptoms. Furthermore, the mechanism between
chronotype and
depressive symptoms needs to be further clarified by identifying the serial multiple
mediation effects of
PUS and SRH.