Chronotype and Mental Health Associations
Summary
Chronotype reflects an individual’s intrinsic preference for timing of sleep–wake cycles and daily activity, commonly categorised as morning or evening types. Accumulating evidence demonstrates that eveningness is associated with increased risk of depressive and anxiety symptoms, substance use disorders and cognitive decline, whereas morningness often confers relative resilience. Key mechanisms include poor sleep quality, misalignment between biological and social time (“social jetlag”), disrupted neuroendocrine rhythms and maladaptive health behaviours. Genetic predispositions, personality traits and early life experiences further modulate these associations. Understanding chronotype–mental health links has global importance for personalised prevention and treatment strategies, such as optimised timing of therapy, sleep hygiene interventions and workplace scheduling.
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Chronotype and Mental Health Associations publication trend
The graph below shows the total number of articles in chronotype and mental health associations across all publications each year (not limited to Nature Index journals).
Technical terms
Chronotype: Individual preference for timing of sleep and activity based on intrinsic circadian phase.
Sleep quality: Subjective measure of how restorative sleep is, encompassing duration, continuity and daytime functioning.
Social jetlag: Mismatch between biological and social timing, quantified by differences in sleep timing between workdays and free days.
References
- Evening Chronotypes With Depression Report Poorer Outcomes of Selective Serotonin Reuptake Inhibitors: A Survey-Based Study of Self-Ratings. Biological Psychiatry (2024).
- Sleep quality mediates the association between chronotype and mental health in young Indian adults. npj Mental Health Research (2024).
- Chronotype as a potential risk factor for cognitive decline: The mediating role of sleep quality and health behaviours in a 10-year follow-up study. The Journal of Prevention of Alzheimer's Disease (2025).
- Chronotype, circadian rhythm, and psychiatric disorders: Recent evidence and potential mechanisms. Frontiers in Neuroscience (2022).
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