Rimes, Katharine A, Goodman, Robert, Hotopf, Matthew et al. · Pediatrics · 2007 · DOI
This study followed 842 British teenagers aged 11-15 for 4-6 months to see how common tiredness and chronic fatigue syndrome (CFS) were and what factors might make them more likely. About 30% of teens developed new fatigue during the study, while less than 1% developed chronic fatigue or CFS. Importantly, most teens who had CFS at the start of the study felt better by the follow-up visit, suggesting that CFS in adolescents often improves over time. Teens with anxiety, depression, or behavior problems were more likely to develop fatigue.
Understanding incidence, natural history, and early risk factors for CFS in adolescents is crucial for early identification and intervention. This study provides rare longitudinal evidence that CFS in youth often remits spontaneously, offering prognostic hope for affected adolescents and their families. The identified association between emotional/behavioral problems and fatigue onset may guide prevention and treatment strategies.
This study does not prove that anxiety or depression *causes* chronic fatigue—only that they are statistically associated and may increase risk. The study uses operational definitions of CFS that may not capture the full complexity of the illness as experienced by patients. The 4-6 month follow-up is relatively short and does not address longer-term prognosis or the mechanisms underlying the association with psychiatric symptoms.
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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