Outpatient melatonin use is associated with a small reduction in REM sleep percentage in children
In a propensity score-matched cross-sectional study of 684 children, melatonin users had a lower median percentage of REM sleep than nonusers (16.7% vs 19.0%, Hedges g = -0.22, FDR-corrected P = .003). No significant differences were found in total sleep time, non-REM sleep stages, respiratory indices, arousal index, periodic limb movements, or oxygen desaturation index.
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Outpatient melatonin use is associated with a small reduction in REM sleep percentage in children The current body of evidence comprises 1 study. EvidenceHub rates the overall confidence at 34/100 (low).
The Claim
Outpatient melatonin use is associated with a small reduction in REM sleep percentage in children
This conclusion is most relevant to: Children (mean age 8.0 years, 56.7% male) evaluated at a pediatric sleep laboratory, propensity-matched cohort of 684 children (342 users, 342 nonusers).
What the Research Shows
The conclusion draws on 1 linked study. Highlights from the cited literature:
- ▸Melatonin Use and Polysomnographic Sleep Architecture in Children. (JAMA network open, 2026) — In a propensity score-matched cross-sectional study of 684 children, melatonin users had a lower median percentage of REM sleep than nonusers (16.7% vs 19.0%, Hedges g = -0.22, FDR-corrected P = .003). No significant differences were found in total sleep time, non-REM sleep stages, respiratory indices, arousal index, periodic limb movements, or oxygen desaturation index.
How It Works
The proposed biological pathway:
- ▸Melatonin may act on melatonin receptors in the suprachiasmatic nucleus to alter circadian timing
- ▸Melatonin may influence REM sleep regulation through effects on neurotransmitter systems
- ▸Melatonin may reduce REM sleep by altering the timing of sleep onset and REM latency
- ▸Result: Reduced REM sleep percentage
Who Might Benefit
Evidence fit by population:
- ▸Children (mean age 8.0 years, 56.7% male) evaluated at a pediatric sleep laboratory, propensity-matched cohort of 684 children (342 users, 342 nonusers)
Recommended Dose
N/A
Limitations & Caveats
Important context when interpreting this evidence:
- ▸Cross-sectional design cannot establish causality
- ▸Residual confounding cannot be excluded, especially from psychiatric diagnoses and other unmeasured factors
- ▸Dose, timing, and adherence of melatonin use were not documented
Frequently Asked Questions
Does melatonin reduce REM sleep in children?▼
Yes, this study found a small reduction in REM sleep percentage (median 16.7% vs 19.0%) in children using melatonin compared to matched nonusers.
What other sleep parameters are affected by melatonin in children?▼
No significant differences were found in total sleep time, non-REM sleep stages, respiratory indices, arousal index, periodic limb movements, or oxygen desaturation index.
Is the reduction in REM sleep clinically significant?▼
The effect size was small (Hedges g = -0.22), and the clinical significance is uncertain. The association was attenuated when psychiatric diagnoses were added to the model.
What type of study was this?▼
This was a cross-sectional, propensity score-matched study using data from a pediatric sleep clinic population.
References
- 1.Juginovic A, Rodman L. “Melatonin Use and Polysomnographic Sleep Architecture in Children..” JAMA network open, 2026. PMID: 42560676 DOI: 10.1001/jamanetworkopen.2026.26983