Sandler, C X, Hamilton, B A, Horsfield, S L et al. · Internal medicine journal · 2016 · DOI
This study tested a 12-week treatment program combining talk therapy (CBT) and supervised exercise for people with chronic fatigue. The program helped about 35% of patients feel significantly better, with improvements lasting at least 6 months. However, some patients (especially men and those with higher pain levels) were less likely to improve, and a small number actually felt worse.
This study bridges the gap between controlled clinical trials and real-world clinical practice by demonstrating that an integrated CBT/GET program can produce meaningful outcomes when delivered in standard healthcare settings. Identifying which patients respond best (or poorly) to this approach helps clinicians tailor interventions more effectively and informs discussions about treatment expectations for ME/CFS patients.
This study cannot establish that CBT/GET is superior to no treatment or other interventions, as there is no control group. The observational design means we cannot determine causation—improvements may reflect natural recovery, placebo effects, or unmeasured factors rather than the treatment itself. The finding that 35% improved does not prove the intervention is universally effective, and the 3% who worsened suggests potential harm for some patients.
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
Sandler, C X, Hamilton, B A, Horsfield, S L, Bennett, B K, Vollmer-Conna, U, Tzarimas, C, et al. (2016). Outcomes and predictors of response from an optimised, multidisciplinary intervention for chronic fatigue states.. Internal medicine journal. https://doi.org/10.1111/imj.13251
BibTeX
@article{mecfsatlas-sandler-2016-outcomes-predictors,
author = {Sandler, C X and Hamilton, B A and Horsfield, S L and Bennett, B K and Vollmer-Conna, U and Tzarimas, C and Lloyd, A R},
title = {Outcomes and predictors of response from an optimised, multidisciplinary intervention for chronic fatigue states.},
journal = {Internal medicine journal},
year = {2016},
doi = {10.1111/imj.13251},
note = {PubMed: 27620986},
url = {https://www.mecfsatlas.com/evidence/sandler-2016-outcomes-predictors},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-29. https://www.mecfsatlas.com/evidence/sandler-2016-outcomes-predictors
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