To the Editor In a cross-sectional study, Koopman-Verhoeff et al1 observed that there was an association between subjectively reported and objectively estimated sleep problems and melatonin use in school-aged children. Their observation highlights the importance of close and enhanced monitoring of currently freely available melatonin because an estimated 1 in 17 children are likely to take melatonin at least once a week.1 However, we have 2 major methodological concerns.
He D, Niu W. Sleep Problems and Melatonin Use in School-aged Children. JAMA Pediatr. Published online January 06, 2020. doi:10.1001/jamapediatrics.2019.5227
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