Pedersen, Maria, Ekstedt, Mirjam, Småstuen, Milada C et al. · Journal of sleep research · 2017 · DOI
This study compared sleep patterns in 120 adolescents with ME/CFS to 39 healthy teenagers using activity monitors and sleep questionnaires. Adolescents with ME/CFS were observed to spend more time in bed, have later sleep timing, and report more sleep problems such as difficulty falling asleep and daytime sleepiness compared to healthy peers. While these findings suggest a possible link between disrupted sleep-wake rhythms and adolescent ME/CFS, the study's cross-sectional design means it cannot determine whether sleep disruption causes ME/CFS or occurs as a consequence of the illness.
Sleep disturbance is a cardinal symptom in ME/CFS, yet the nature and role of sleep-wake rhythm abnormalities in adolescents remain poorly understood. This study provides objective and subjective evidence of both delayed and variable sleep-wake patterns in adolescent ME/CFS, suggesting that sleep dysregulation may warrant clinical attention in paediatric management. Understanding whether sleep rhythm disruption is a driver or consequence of illness could inform targeted interventions.
This study does not establish causation: it cannot determine whether disrupted sleep-wake rhythms cause ME/CFS, result from ME/CFS, or are both consequences of a shared underlying process. It does not identify a mechanism. The cross-sectional design means no temporal sequence was measured. Findings apply only to adolescents and may not generalise to adult ME/CFS populations.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
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