Chronotype, circadian rhythms and mood

A majority of studies indicate an association between chronotype and mood, with eveningness potentially linked to a risk for depression.

• Chronotype is typically measured by preferences for morning or evening activities rather than actual sleep behavior or biological markers.
• Evening chronotype may be associated with an increased risk of depression.
• The directionality of the relationship between chronotype and mood remains unclear.
• Stronger associations between depressive symptoms and misalignment with the biological clock have been observed.
• Future research should integrate various measures of chronotype for a more comprehensive understanding of its link to mood.

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