Sleep timing preferences and anxiety are linked in people with long-term insomnia

Significant negative correlations were found between chronotype and anxiety in 64 patients with chronic primary insomnia.

• A correlation coefficient of r = -0.40 indicates that a preference for eveningness is linked to increased state and trait anxiety.
• Correlations were also observed between eveningness preference and pre-sleep state anxiety (r = -0.30).
• The findings suggest that chronotype may influence the severity of anxiety symptoms in individuals with chronic primary insomnia.
• Eveningness preference could be a contributing factor to the anxiety-insomnia-depression cycle in these patients.

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