Evening chronotype is more frequent in children and adolescents with OCD and is associated with lower symptom severity

The Claim

Evening chronotype is more frequent in children and adolescents with OCD and is associated with lower symptom severity

This conclusion is most relevant to: Children and adolescents aged 6-18 years with OCD (n=29) and age- and sex-matched healthy controls (n=30).

What the Research Shows

The conclusion draws on 1 linked study. Highlights from the cited literature:

• ▸Chronotype preference and circadian markers in children and adolescents with obsessive-compulsive disorder: A case-control study. (Sleep medicine, 2026) — In a case-control study of 29 children/adolescents with OCD and 30 matched controls, evening chronotype was significantly more common in the OCD group (p<0.05). Within the OCD group, those with evening chronotype had significantly lower CY-BOCS scores (p<0.05) and higher morning salivary melatonin levels (p<0.05), while cortisol did not differ.

How It Works

The proposed biological pathway:

• ▸Circadian rhythm disruption may influence OCD pathophysiology
• ▸Evening chronotype reflects altered circadian timing
• ▸Higher morning melatonin in evening chronotype suggests phase delay
• ▸Phase delay may modulate OCD symptom expression

Who Might Benefit

Evidence fit by population:

• ▸Children and adolescents aged 6-18 years with OCD (n=29) and age- and sex-matched healthy controls (n=30)

Recommended Dose

N/A

Limitations & Caveats

Important context when interpreting this evidence:

• ▸Small sample size (n=29 OCD, n=30 controls)
• ▸Cross-sectional design prevents causal inference
• ▸Single morning measurement of melatonin and cortisol may not capture full circadian profile

Frequently Asked Questions