Albers, Eline, Nijhof, Linde N, Berkelbach van der Sprenkel, Emma E et al. · Journal of medical Internet research · 2021 · DOI
This study tested whether an internet-based therapy program called FITNET, delivered through routine clinical care, works as well as it did in earlier controlled research. The program helps teenagers with ME/CFS through structured cognitive behavioral therapy done online. Results showed that teenagers improved significantly with similar outcomes to the original research study, and very few got worse during treatment.
This study provides evidence that internet-based cognitive behavioral therapy for adolescent ME/CFS can be safely and effectively delivered in real clinical settings, not just research trials. This is important because it demonstrates a scalable treatment option that may improve access for young patients without requiring intensive in-person appointments. The low deterioration rates are particularly reassuring for patients considering this treatment.
This observational study does not prove causation or establish superiority over other treatments—it shows non-randomized outcomes compared to historical controls. The 41 patients who required face-to-face consultations during FITNET complicate attribution of improvement to the internet-based intervention alone. The study cannot determine which specific components of FITNET drive improvement or whether benefits persist long-term beyond the immediate posttreatment period.
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 →
The first block is for the primary paper and is the citation you should use in research work. The atlas-snapshot line only applies if you are specifically referring to this atlas’s reading of the paper on the date shown.
Primary citation
Albers, Eline, Nijhof, Linde N, Berkelbach van der Sprenkel, Emma E, van de Putte, Elise M, Nijhof, Sanne L, & Knoop, Hans (2021). Effectiveness of Internet-Based Cognitive Behavior Therapy (Fatigue in Teenagers on the Internet) for Adolescents With Chronic Fatigue Syndrome in Routine Clinical Care: Observational Study.. Journal of medical Internet research. https://doi.org/10.2196/24839
BibTeX
@article{mecfsatlas-albers-2021-effectiveness-internet,
author = {Albers, Eline and Nijhof, Linde N and Berkelbach van der Sprenkel, Emma E and van de Putte, Elise M and Nijhof, Sanne L and Knoop, Hans},
title = {Effectiveness of Internet-Based Cognitive Behavior Therapy (Fatigue in Teenagers on the Internet) for Adolescents With Chronic Fatigue Syndrome in Routine Clinical Care: Observational Study.},
journal = {Journal of medical Internet research},
year = {2021},
doi = {10.2196/24839},
note = {PubMed: 34397389},
url = {https://www.mecfsatlas.com/evidence/albers-2021-effectiveness-internet},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-28. https://www.mecfsatlas.com/evidence/albers-2021-effectiveness-internet
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