E2 ModerateModerate confidencePEM not requiredCross-SectionalPeer-reviewedMachine draft
Severe fatigue in adolescents: a common phenomenon?
ter Wolbeek, Maike, van Doornen, Lorenz J P, Kavelaars, Annemieke et al. · Pediatrics · 2006 · DOI
Quick Summary
This study looked at how common severe tiredness is in teenagers and whether it's connected to depression, anxiety, and other symptoms seen in ME/CFS patients. Researchers surveyed over 3,400 teenagers about their fatigue, mood, sleep, and daily habits. They found that severe fatigue is quite common in adolescents—especially in girls—and that it often clusters with depression, anxiety, and ME/CFS-like symptoms.
Why It Matters
This study demonstrates that severe adolescent fatigue is not rare and frequently co-occurs with depression, anxiety, and ME/CFS-related symptoms as an interconnected cluster. Understanding fatigue prevalence and its psychological correlates in healthy adolescents helps identify early markers and risk trajectories that may precede ME/CFS diagnosis, potentially enabling earlier intervention.
Observed Findings
- 20.5% of adolescent girls and 6.5% of boys scored above clinical cutoff for severe fatigue; of these, 80% of girls and 61.5% of boys reported severe fatigue lasting ≥1 month.
- Sleep quality and sports participation predicted fatigue severity in both genders.
- Girls scored significantly higher on depression, anxiety, and CFS-related symptom measures than boys.
- Fatigue duration was positively correlated with severity of depression, anxiety, and CFS-related symptoms in both genders.
- In girls, fatigue was additionally predicted by older age, early menarche, medication use, and lack of supplemental employment.
Inferred Conclusions
- Severe fatigue prevalence is high in adolescents, with girls showing greater vulnerability than boys.
- Fatigue, depression, anxiety, and CFS-related symptoms form an interconnected symptom cluster in both genders.
- Prolonged severe fatigue may represent a modifiable risk factor or prodromal state for subsequent CFS development.
- Lifestyle factors (sleep and exercise) appear modifiable targets for fatigue management in adolescents.
Remaining Questions
- Does fatigue duration progress to formal ME/CFS diagnosis in follow-up, or does it resolve? What is the mechanistic relationship between fatigue and comorbid psychological symptoms—are they downstream effects of a shared biological process?
What This Study Does Not Prove
This cross-sectional study cannot establish causality or directionality—it does not prove that fatigue causes depression/anxiety or vice versa, nor does it confirm that adolescent severe fatigue inevitably progresses to ME/CFS. The study uses questionnaire-based fatigue assessment rather than objective biomarkers or the specific post-exertional malaise definition central to ME/CFS diagnosis, so findings may not directly represent clinical CFS cases.
Tags
Symptom:Unrefreshing SleepFatigue
Phenotype:Pediatric
Method Flag:PEM Not DefinedWeak Case DefinitionNo ControlsSex-Stratified
Metadata
- DOI
- 10.1542/peds.2005-2575
- PMID
- 16740810
- Review status
- Machine draft
- Evidence level
- Single-study or moderate support from human research
- Last updated
- 8 April 2026
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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