FITNET's Internet-Based Cognitive Behavioural Therapy Is Ineffective and May Impede Natural Recovery in Adolescents with Myalgic Encephalomyelitis/Chronic Fatigue Syndrome. A Review. — ME/CFS Atlas
FITNET's Internet-Based Cognitive Behavioural Therapy Is Ineffective and May Impede Natural Recovery in Adolescents with Myalgic Encephalomyelitis/Chronic Fatigue Syndrome. A Review.
Ghatineh, Simin, Vink, Mark · Behavioral sciences (Basel, Switzerland) · 2017 · DOI
Quick Summary
This review examined a Dutch study called FITNET that claimed internet-based cognitive behavior therapy helped adolescents with ME/CFS recover at high rates. The reviewers found serious problems with how the study was designed and analyzed, including how they defined 'recovery' and that they didn't use objective measurements like activity monitors to confirm their results. The study actually found no meaningful difference between the therapy group and the usual care group at long-term follow-up, suggesting the treatment may not have worked as claimed.
Why It Matters
This analysis is important because the FITNET study significantly influenced clinical practice guidelines and ME/CFS treatment recommendations, including plans for a costly NHS-funded replication. The review's findings suggest that CBT and graded exercise therapy may be ineffective or potentially harmful for adolescents with ME/CFS, challenging the basis for these widely-promoted interventions and raising concerns about unnecessary costs and potential harm to patients.
Observed Findings
The original FITNET study reported 63% recovery rate with CBT versus 8% with usual care at 6 months.
At long-term follow-up, both the CBT group and usual care group showed approximately 60% recovery rates with no significant difference between groups.
The study did not publish objective actometer (activity monitor) data despite measuring it.
The study used post-hoc definitions of recovery that included patients who remained severely ill.
Documented spontaneous recovery rates in ME/CFS adolescents are 54-94% within 3-4 years.
Inferred Conclusions
Both FITNET and usual care (CBT and graded exercise therapy) appear ineffective and may even impede natural recovery in adolescents with ME/CFS.
The trial's methodological biases—including unblinded design, post-hoc recovery definitions, and questionnaire-only assessments—likely inflated the claimed treatment benefits.
The lack of published objective activity data and the absence of group differences at long-term follow-up suggest the treatment did not provide measurable benefits.
Remaining Questions
Why were actometer results not published, and what did the objective activity data actually show?
Do spontaneous recovery rates truly exceed the recovery rates achieved with CBT and graded exercise therapy, or do these interventions delay natural improvement?
What This Study Does Not Prove
This review does not prove that CBT is harmful to ME/CFS patients, only that the FITNET evidence supporting its benefit is methodologically flawed. The reanalysis does not establish causation regarding any detrimental effects, nor does it negate the possibility that some individuals may benefit from adapted psychological support. It also does not address whether different therapeutic approaches or subgroups of patients might respond differently.
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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