E2 ModerateModerate confidencePEM not requiredLongitudinalPeer-reviewedReviewed
Fatigue, depressive symptoms, and anxiety from adolescence up to young adulthood: a longitudinal study.
ter Wolbeek, Maike, van Doornen, Lorenz J P, Kavelaars, Annemieke et al. · Brain, behavior, and immunity · 2011 · DOI
Quick Summary
This study followed 633 teenage girls for 4.5 years to understand what causes fatigue and ME/CFS-like symptoms in young adulthood. Researchers found that fatigue, depression, and anxiety tend to rise and fall together over time, and that certain immune markers and emotional problems during teenage years could predict who would develop fatigue later. The study suggests that warning signs of future fatigue can sometimes be spotted years before symptoms become serious.
Why It Matters
This study provides longitudinal evidence that ME/CFS and associated symptoms may be identifiable years before clinical manifestation, potentially enabling early intervention. The finding that emotional distress and immune dysregulation precede fatigue development offers insight into ME/CFS pathophysiology and suggests targets for prevention strategies in at-risk adolescents.
Observed Findings
- Baseline fatigue severity was the strongest predictor of fatigue in young adulthood.
- In adolescents without baseline fatigue who later developed fatigue, emotional problems and CFS-related symptoms during adolescence preceded the increase in fatigue.
- Fatigue, depressive symptoms, and anxiety increased and decreased together over the 4.5-year period, suggesting symptom clustering.
- Higher baseline IFN-γ levels and IFN-γ/IL-4 ratio, along with lower TNF-α and IL-10, were associated with increased fatigue severity at follow-up.
- Adolescent anxiety and decreased physical activity predicted the rise in CFS-related symptoms at follow-up.
Inferred Conclusions
- Vulnerability to fatigue and associated ME/CFS-related symptoms in young adulthood can be partially predicted by psychological and immunological markers identified years earlier.
- Fatigue, depression, and anxiety represent a co-varying symptom cluster with shared temporal dynamics during the transition to adulthood.
- Specific immune dysregulation patterns (Th1-skewed response) may underlie the development of fatigue and CFS-related symptoms.
- Early identification of emotional distress and CFS-related complaints in adolescents may enable preventive interventions.
Remaining Questions
What This Study Does Not Prove
This study does not prove that emotional problems cause ME/CFS; the clustering of fatigue, anxiety, and depression may reflect shared biological mechanisms rather than causation. The findings are observational and correlational, so the direction of causality between immune markers and fatigue remains unclear. Additionally, findings are limited to females and may not apply to males or more severe CFS populations.
Tags
Symptom:Unrefreshing SleepFatigue
Biomarker:Cytokines
Phenotype:Gradual OnsetPediatric
Method Flag:PEM Not DefinedWeak Case DefinitionNo ControlsExploratory OnlyMixed CohortSmall Sample
Metadata
- DOI
- 10.1016/j.bbi.2011.04.015
- PMID
- 21549830
- Review status
- Editor reviewed
- Evidence level
- Single-study or moderate support from human research
- Last updated
- 12 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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