Maquet, D, Demoulin, C, Crielaard, J M · Annales de readaptation et de medecine physique : revue scientifique de la Societe francaise de reeducation fonctionnelle de readaptation et de medecine physique · 2006 · DOI
Quick Summary
This review examined all available research about ME/CFS to understand what we know about the condition. Researchers found that ME/CFS affects between 0.2% and 0.7% of people and that despite decades of research into possible causes like infections, immune problems, and hormonal imbalances, we still don't fully understand what causes the illness. Treatment should combine physical rehabilitation with psychological support to address the whole person.
Why It Matters
This comprehensive review synthesizes the state of scientific knowledge about ME/CFS and highlights that despite substantial research effort across multiple biological systems, the underlying cause remains unknown. For patients, this emphasizes the complexity of the condition and supports integrated treatment approaches combining physical rehabilitation with psychological support.
Observed Findings
ME/CFS prevalence ranges from 0.2% to 0.7% in the general population
Research has investigated multiple potential mechanisms including infection, immune dysfunction, neuroendocrinological abnormalities, autonomic dysfunction, and neuromuscular involvement
Diagnostic criteria were formally defined in 1988 by the CDC and revised in 1994 by Fukuda et al.
Despite extensive research across multiple biological domains, the pathophysiology of ME/CFS remains unknown
Inferred Conclusions
No single biological mechanism has been definitively established as the cause of ME/CFS despite investigation across multiple systems
A biopsychosocial model is necessary to understand and treat ME/CFS effectively
Progressive muscular rehabilitation combined with behavioral and cognitive treatment represents an evidence-supported therapeutic approach
ME/CFS requires recognition as a serious condition with significant clinical and functional impacts
Remaining Questions
What is the underlying pathophysiological mechanism or mechanisms causing ME/CFS?
Why do multiple biological systems (immune, neurological, endocrine, autonomic) show abnormalities in ME/CFS patients, and are these primary or secondary effects?
What This Study Does Not Prove
This systematic review does not identify the cause of ME/CFS or prove the effectiveness of any single treatment; it rather maps the current knowledge landscape and indicates where investigation has been conducted. The review cannot establish causation for the various biological abnormalities studied, as many may be consequences rather than causes of the illness. It also does not provide new empirical evidence—it synthesizes existing literature.
What is the optimal combination and intensity of rehabilitation, cognitive-behavioral therapy, and other interventions for different patient subgroups?
Are there biomarkers or diagnostic tests that could objectively identify ME/CFS and distinguish it from other conditions?