How Sleep Timing and Insomnia Symptoms Are Linked to Starting and Continuing Depression Over 8 Years

This study aimed to examine the relationship between chronotype and depressive symptoms over time.

• Previous research has primarily focused on the cross-sectional relationship between chronotype and depressive symptoms.
• The temporal relationship between these two factors is not yet clearly understood.
• Insomnia symptoms may play a role in modifying the longitudinal association between chronotype and depressive symptoms.

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