Two adolescent mental health fields—sleep and depression—have advanced largely in
parallel until about four years ago. Although sleep problems have been thought to be a …

Highlights•Most studies measure morningness/eveningness preference rather than
'chronotype'.•Few longitudinal studies exist, and show contrasting results for the direction of …

The circadian system is responsible for internal functions and regulation of the organism
according to environmental cues (zeitgebers). Circadian rhythm dysregulation or …

Youth is a vulnerable developmental period associated with an increased preference for
eveningness and risk for developing psychopathology. Growing evidence suggested a link …

Mounting evidence demonstrates a close relationship between sleep disturbance and mood
disorders, including major depression disorder (MDD) and bipolar disorder (BD). According …

Study objectives An evening circadian preference is common among adolescents. It is
characterized by a behavioral predilection for later sleep and wake timing and is associated …

Objectives Short or long sleep duration, insufficient sleep, and Evening chronotype
associate with many health issues and increased risk for mortality. Understanding …

Circadian rhythms play an important role in a wide range of human physiology and
pathology. Individuals increasingly experience situations such as night-shift work schedules …

Background & aim The coronavirus disease 2019 (COVID-19) pandemic has affected the life
and work of people worldwide. The present study aimed to evaluate the rhythm disruptions …

Objective Our aim was to investigate evening chronotype, a proxy marker of circadian
system dysfunction, as a clinical subphenotype in bipolar disorder (BD). Methods In this …