Snoring and sleep apnea in children and adolescents: evidence on insomnia, impacts, and the role of melatonin

Editorial note (brief): This article was previously published and is presented here in an updated version, revised according to scientific and divulgative criteria. The purpose is informative: it does not replace personal medical advice. In case of symptoms or doubts, consult a healthcare professional.

IN BRIEF

• Habitual snoring and sleep apnea in young people are common and associated with behavioral problems; population studies show associations but do not always explain direct causality.
• Sleep disorders in children and adolescents increased during lockdown periods; meta-analysis data suggest significant increases in reports of insomnia and altered sleep-wake rhythms.
• Melatonin has a consolidated biological role in regulating the circadian rhythm and possesses antioxidant properties; in the pediatric field, it has shown effects on sleep onset latency in selected populations, but clinical results vary depending on the population and formulation.
• Diagnostic and therapeutic choices must consider the distinction between observational data and experimental evidence; interventions such as adenotonsillectomy have specific indications documented by clinical trials for certain age groups and severity.

Abstract: what does science say?

Snoring and obstructive sleep apnea (OSA) are recognized phenomena in pediatric and adolescent age; in many population studies, habitual snoring occurs in 5–15% of children and can be associated with behavioral disorders, daytime sleepiness, and academic difficulties. Available evidence includes large-scale cross-sectional and longitudinal studies, systematic reviews, and clinical trials on specific interventions. Systematic analyses conducted during the SARS-CoV-2 pandemic show an increase in reports of sleep difficulties in young people, likely related to changes in routine, prolonged screen use, and reduced outdoor activity. Melatonin is a physiological mediator of the sleep-wake rhythm with antioxidant and immunomodulatory properties; clinical trials in children with sleep disorders (including those with neurodevelopmental comorbidities) have documented reductions in sleep onset latency and, in some cases, modest increases in total sleep duration. However, the generalizability of these results depends on age, underlying diagnosis, melatonin formulation (rapid or prolonged release), dose, and study design. In summary: the literature supports the existence of associations between snoring/apnea and worsening of certain behavioral domains, indicates that sleep disorders have increased in particular contexts (e.g., lockdown), and recognizes a role for melatonin as a supportive tool in specific pediatric populations; but methodological limitations necessitate cautious interpretations and personalized decisions.

Snoring, apnea, and sleep: what we know

Snoring is the most evident symptom of sleep-disordered breathing, which in its most severe forms manifests as obstructive sleep apnea syndrome (OSA). Recent analyses of large cohorts of young people indicate that the proportion of individuals reporting habitual snoring (at least 3 nights a week) is a few percentage points in the pre-adolescent age group and tends to progressively decrease with age in adolescence [1]. These findings come from questionnaires collected from very large and representative population samples, and show a clear association between persistent snoring and higher scores on behavioral problem checklists, while evidence on measurable effects on cognitive function is more heterogeneous [1].

Epidemiology in young people

International studies and meta-analyses show geographical and methodological variability in the prevalence of sleep disorders; during the COVID-19 pandemic, the overall prevalence of reported sleep disorders in children and adolescents was significantly higher compared to pre-pandemic periods, with differences related to age, assessment method (parent vs. self-assessment), and socio-cultural context [2]. These data support the idea that social and routine events strongly influence sleep rhythms.

Impact on learning and behavior

Observational literature reports associations between snoring/OSA and increased behavioral problems, while the effects on cognitive performance measured with standardized tests are less consistent: some research does not detect significant deficits after controlling for confounding factors, while others show correlations with attentional functions or memory in specific subgroups [1][8]. Interpretation must consider the observational nature of many studies and the presence of possible confounders (body mass index, socioeconomic factors, comorbidities).

Melatonin: biological functions and limitations of evidence

Melatonin is an indoleamine produced by the pineal gland with the primary biological task of synchronizing the circadian rhythm with the light-dark cycle. At the molecular level, it also exerts antioxidant actions, participates in anti-inflammatory pathways, and has been the subject of numerous preclinical studies describing its cellular and mitochondrial protective effects [3]. These properties explain the clinical interest in melatonin not only as a sleep aid but also as a possible modulator of broader biological processes. However, the ability of these mechanisms to translate into general clinical benefits (for example, in the prevention of chronic diseases or in cancer treatment) remains a matter of research, with evidence still predominantly preclinical or from small clinical studies [3].

Evidence of efficacy in children

Controlled clinical trials and systematic reviews indicate that melatonin can reduce sleep onset latency and, in some pediatric populations (for example, children with neurodevelopmental disorders), modestly increase nocturnal sleep duration compared to placebo [4][5]. It is important to distinguish between populations: the best results are observed in studies on children with specific comorbidities; in isolated forms of pediatric insomnia, the results are more variable. Doses, formulations, and monitoring influence outcomes.

Melatonin, antioxidation, and general health

Experimental literature and reviews indicate that melatonin and its metabolites can act as radical scavengers and modulate intracellular antioxidant systems; this principle is well documented, but the clinical translation to complex outcomes (for example, oncological survival or reduction of cardiovascular risk) requires caution: some clinical research suggests beneficial palliative or supportive effects, but there is no definitive evidence confirming preventive or curative efficacy on a large scale [3].

What it means in practice

For families, educators, and professionals, the practical reading of the evidence leads to considering some concrete points. First: habitual snoring in children should not be trivialized; along with clinical signs (noisy breathing with pauses, excessive daytime sleepiness, academic or behavioral difficulties), it may require specialist evaluation and, in certain cases, instrumental investigation. Large population studies have found associations between snoring and increased behavioral problems, which should be discussed in clinical evaluation [1].

Second: environmental modifications (regular schedules, limiting evening screen use, daytime physical activity, exposure to natural light) remain important basic measures supported by good practice guidelines as first interventions to improve sleep-wake rhythm [2]. Third: melatonin can be a supportive option in selected contexts (for example, children with delayed sleep phase or with sleep disorders associated with neurodevelopmental conditions), but it should be used with clinical supervision and after excluding organic causes of snoring or apnea [4][5].

Finally, for documented forms of OSA or in the presence of adenotonsillar hypertrophy, surgical interventions (adenotonsillectomy) are supported by clinical trials that evaluate their efficacy and limitations depending on severity and age; in some studies, the benefit on certain outcomes is demonstrated, while in others the response may be partial and require a multidisciplinary approach [6].

Limitations of evidence

When evaluating the literature on snoring, apnea, insomnia, and melatonin, it is crucial to distinguish study designs. Observational and population studies are very useful for estimating prevalences and associations, but they cannot prove causal relationships: socioeconomic, behavioral, or health confounders can influence the results. Meta-analyses and systematic reviews help to synthesize heterogeneous data, but they are affected by the quality of the included studies and methodological heterogeneity [2].

Randomized clinical trials provide more robust evidence on the efficacy of individual interventions (for example, adenotonsillectomy or melatonin administration in selected groups), but the results are limited by the duration of follow-up, sample sizes, and the studied population; moreover, the evaluated outcomes (behavior, quality of life, subjective measures vs. instrumental measures) can yield discordant results [4][5][6].

For many biological claims (antioxidation, potential antitumor effects), most of the evidence is preclinical or derived from studies with small clinical groups; well-designed and replicated clinical studies are needed before extending recommendations to the population level [3].

Key takeaways

• Habitual snoring in children deserves attention: it can be an indicator of sleep-disordered breathing and be associated with behavioral problems.
• Sleep disorders in young people have increased in certain contexts (e.g., lockdown), suggesting strong environmental modifiability.
• Melatonin is useful in specific pediatric situations to improve sleep onset, but it is not a universal solution for all sleep disorders.
• Clinical decisions must be based on multidisciplinary evaluation, distinguishing between observational association and experimental proof of efficacy.
• In adolescents with delayed sleep, regularity of schedules and sleep hygiene are effective and low-risk primary interventions.

Editorial conclusion

Snoring, apnea, and insomnia in children and adolescents are topics of clinical and social relevance. Recent research has expanded knowledge on prevalence, associations with behavior, and possible interventions, but also shows methodological limitations that require caution in interpretation. Melatonin is a tool with a solid biological basis and useful clinical results in some pediatric groups; however, it does not replace a complete medical evaluation or environmental and behavioral good practice measures. For families and practitioners, the most prudent path is careful clinical evaluation, the adoption of consistent non-pharmacological interventions, and, when necessary, recourse to specialists for targeted diagnosis and therapies.

Editorial note (bottom of article)

Article updated following scientific and editorial review. Informative purpose: does not replace the judgment of the treating physician. For diagnosis or therapy, consult a healthcare professional.

SCIENTIFIC RESEARCH

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