Research
Mixed
Excessive daytime sleepiness (EDS) is not bidirectionally related to depression; anxiety predicts EDS, but EDS does not predict depression.
If you have excessive daytime sleepiness but not clear depression, check for anxiety. Treating the anxiety might resolve the sleepiness, as EDS does not directly cause depression.
LimitedRefutesLOW confidence
A one-way relationship was found where anxiety predicted excessive daytime sleepiness, but excessive daytime sleepiness was not associated with depression.
Why this rating
Based on only one study included in the review, with limited generalizability.
Source
A Systematic Review Assessing Bidirectionality between Sleep Disturbances, Anxiety, and Depression
Pasquale K. Alvaro et al. · SLEEP · 2013
DOI 10.5665/sleep.2810
systematic_reviewCited 1,526×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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