About the Study : In this cross-sectional study of 684 propensity score–matched children, outpatient melatonin use was associated with a small reduction in REM sleep percentage and was not associated with differences in total sleep time, non-REM sleep stages, respiratory parameters, arousal architecture, or periodic limb movements. The REM association was attenuated when psychiatric diagnoses were added to the propensity model. Residual confounding cannot be excluded, and prospective studies with documented dose, timing, and adherence are needed to clarify the directionality of this association.
This Original Investigation has an accompanying Invited Commentary .
Corresponding Author : Alen Juginovic, MD, Department of Neurobiology, Harvard Medical School, 220 Longwood Ave, Boston, MA 02115 ( alen_juginovic@hms.harvard.edu ).
10.1001/jamanetworkopen.2026.26983
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