The DOI matches its Crossref record; 34 of the 34 references it cites were found in a registry or an index.
Rehabilitative therapies for chronic fatigue syndrome: a secondary mediation analysis of the PACE trial.
Open accessAbstract
Background Cognitive behaviour therapy (CBT) added to specialist medical care (SMC), or graded exercise therapy (GET) added to SMC, are more effective in reducing fatigue and improving physical function than both adaptive pacing therapy (APT) plus SMC and SMC alone for chronic fatigue syndrome. We investigate putative treatment mechanisms.Methods We did a planned secondary mediation analysis of the PACE trial comparing SMC alone or SMC plus APT with SMC plus CBT and SMC plus GET for patients with chronic fatigue syndrome. 641 participants were recruited from six specialist chronic fatigue syndrome clinics in the UK National Health Service between March 18, 2005, and Nov 28, 2008. We assessed mediation using the product of coefficients method with the 12 week measure of the mediators and the 52 week measure of the outcomes. The primary outcomes were fatigue measured by the Chalder fatigue scale and physical function measured by the physical function subscale of the SF-36. We included confounder covariates and used treatment by mediator interaction terms to examine differences in mediator-outcome relations by treatment group.Findings The largest mediated effect for both CBT and GET and both primary outcomes was through fear avoidance beliefs with an effect of larger magnitude for GET (standardised effects ×10, CBT vs APT, fatigue -1.22, 95% CI -0.52 to -1.97, physical function 1.54, 0.86 to 2.31; GET vs APT, fatigue -1.86, -0.80 to -2.89, physical function 2.35, 1.35 to 3.39). Increase in exercise tolerance (6 min walk distance) was a potent mediator of the effect of GET (vs APT, fatigue -1.37, 95% CI -0.76 to -2.21, physical function 1.90, 1.10 to 2.91), but not CBT.Interpretation Our main finding was that fear avoidance beliefs were the strongest mediator for both CBT and GET. Changes in both beliefs and behaviour mediated the effects of both CBT and GET, but more so for GET. The results support a treatment model in which both beliefs and behaviour play a part in perpetuating fatigue and disability in chronic fatigue syndrome.Funding UK Medical Research Council, Department of Health for England, Scottish Chief Scientist Office, Department for Work and Pensions, National Institute for Health Research (NIHR), NIHR Biomedical Research Centre for Mental Health at South London and Maudsley NHS Foundation Trust, and Institute of Psychiatry, Psychology, and Neuroscience, King's College London.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
The cited source says what the claim attributes to it.
In the citing paper
“In the same treatment study, sleep problems measured at 12 weeks were also found to mediate part of the effect of CBT and GET on fatigue at 1-year follow-up, when compared to standard medical care (Chalder et al., 2015).”
From The relationship between improvement in insomnia severity and long-term outcomes in the treatment of chronic fatigue (2018) · cites this paper as Chalder et al., 2015
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Baron, R. M., & Kenny, D. A. (1986) · Journal of Personality and Social Psychology · doi:10.1037/0022-3514.51.6.1173 · Cited by 91,532
An Introduction to the Bootstrap
Efron, B., & Tibshirani, R. J. (1994) · doi:10.1201/9780429246593 · Cited by 40,500
An Introduction to the Bootstrap
Efron, B., & Tibshirani, R. J. (1993) · doi:10.1007/978-1-4899-4541-9 · Cited by 21,230
The american college of rheumatology 1990 criteria for the classification of fibromyalgia
Wolfe, F., Smythe, H. A., Yunus, M. B., Bennett, R. M., Bombardier, C., Goldenberg, D. L., Tugwell, P., Campbell, S. M., Abeles, M., Clark, P., et al. (1990) · Arthritis & Rheumatism · doi:10.1002/art.1780330203 · Cited by 9,563
Introduction to Statistical Mediation Analysis
MacKinnon, D. P. (2012) · doi:10.4324/9780203809556 · Cited by 5,618
Enders, C., & Bandalos, D. (2001) · Structural Equation Modeling: A Multidisciplinary Journal · doi:10.1207/s15328007sem0803_5 · Cited by 4,978
The PHQ-15: Validity of a New Measure for Evaluating the Severity of Somatic Symptoms
Kroenke, K., Spitzer, R. L., & Williams, J. B. W. (2002) · Psychosomatic Medicine · doi:10.1097/00006842-200203000-00008 · Cited by 3,415
The Work and Social Adjustment Scale: a simple measure of impairment in functioning
Mundt, J. C., Marks, I. M., Shear, M. K., & Greist, J. M. (2002) · British Journal of Psychiatry · doi:10.1192/bjp.180.5.461 · Cited by 2,515
Process Analysis: Estimating Mediation in Treatment Evaluations
Judd, C. M., & Kenny, D. A. (1981) · Evaluation Review · doi:10.1177/0193841x8100500502 · Cited by 2,442
A report—Chronic fatigue syndrome: Guidelines for research
Sharpe, M. C. (1991) · Journal of the Royal Society of Medicine · doi:10.1177/014107689108400224 · Cited by 1,026
Self-citation
Research works printed but not linked: 1
- Clark, 2005, The role of deconditioning and therapeutic exercises in chronic fatigue syndrome (CFS), JMent Health, 14, 237
Cited by
Sorted by citations
Items 101–134 of 134
Discernment of mediator and outcome measurement in the PACE trial
Carr, E., Vitoratou, S., Chalder, T., & Goldsmith, K. (2021) · Journal of Psychosomatic Research · doi:10.1016/j.jpsychores.2021.110595 · Cited by 3
Self-citationKallesøe, K. H., Ørnbøl, E., Wellnitz, K. B., & Rask, C. U. (2025) · Cognitive Behaviour Therapy · doi:10.1080/16506073.2025.2521719 · Cited by 3
Kuut, T. A., Verdam, M. G. E., Braamse, A. M. J., Bleeker‐Rovers, C. P., Knoop, H., & Müller, F. (2025) · Journal of Psychosomatic Research · doi:10.1016/j.jpsychores.2025.112467 · Cited by 3
Toussaint, A. C., Hartl, J., Buck, L., Löwe, B., Stahlmann, K., Vettorazzi, E., & Schramm, C. (2026) · Journal of Psychosomatic Research · doi:10.1016/j.jpsychores.2026.112931 · Cited by 2
What makes a difference in chronic fatigue syndrome?
Knoop, H., & Wiborg, J. F. (2015) · The Lancet Psychiatry · doi:10.1016/s2215-0366(14)00145-x · Cited by 2
Rødevand, L. N. (2017) · Scandinavian Psychologist · doi:10.15714/scandpsychol.4.e1 · Cited by 2
Martin, M., & Alexeeva, I. (2017) · Mental health and physical activity · doi:10.1016/j.mhpa.2017.12.003 · Cited by 2
In non-blinded trials, self-report measures could mislead
Faulkner, G. E. (2015) · The Lancet Psychiatry · doi:10.1016/s2215-0366(15)00089-9 · Cited by 2
Methods and outcome reporting in the PACE trial
Kirby, S. B. M. (2015) · The Lancet Psychiatry · doi:10.1016/s2215-0366(15)00110-8 · Cited by 2
Treatment of Myalgic Encephalomyelitis/Chronic Fatigue Syndrome
Kindlon, T., & Shepherd, C. (2015) · Annals of Internal Medicine · doi:10.7326/l15-5175 · Cited by 2
Wei, Z., Wu, H., Chong, C., Wang, Z., Xiong, H., Song, F., & Ren, J. (2025) · Frontiers in Neurology · doi:10.3389/fneur.2025.1681990 · Cited by 1
Reframing ME/CFS: toward a unified mechanistic model of chronic post-infectious diseases
Watton, P. N., & Prusty, B. K. (2026) · Journal of Translational Medicine · doi:10.1186/s12967-026-08319-3 · Cited by 1
Cognitive-behavioral therapy for post COVID-19 condition: A pilot randomized controlled trial
Sauer, K. S., Bräscher, A., Germer, S., Huth, D., Kolb, J., Mütze, K., & Witthöft, M. (2026) · Journal of Psychosomatic Research · doi:10.1016/j.jpsychores.2026.112920 · Cited by 1
Sunnquist, M. (2016) · Digital Commons-DePaul (DePaul University) · Cited by 1
Twisk, F. (2017) · Medical Research and Innovations · doi:10.15761/mri.1000118 · Cited by 1
Vink, M., & Partyka-Vink, K. (2025) · Life · doi:10.3390/life15040584 · Cited by 1
Doubts over the validity of the PACE hypothesis
Courtney, R. H. (2015) · The Lancet Psychiatry · doi:10.1016/s2215-0366(15)00054-1 · Cited by 1
Methods and outcome reporting in the PACE trial–Author's reply
Chalder, T., Goldsmith, K., White, P. D., Sharpe, M., & Pickles, A. R. (2015) · The Lancet Psychiatry · doi:10.1016/s2215-0366(15)00114-5 · Cited by 1
Self-citationPsychotherapy: beware of false certitude
Watts, J. (2015) · The Lancet Psychiatry · doi:10.1016/s2215-0366(15)00052-8
Studier av kognitiv beteendeterapi och gradvis ökad träning vid ME/CFS är missvisande
Helmfrid, S. (2016) · Socialmedicinsk tidskrift · doi:10.62607/smt.v93i4.42350
Brümmer, L., & McAndrews, Z. (2016) · Clinical Psychology Forum · doi:10.53841/bpscpf.2016.1.280.15
Bouman, S., Müller, F., Onghena, P., & Knoop, H. (2023) · Journal of EMDR Practice and Research · doi:10.1891/emdr-2022-0060
Vergauwen, K. (2024) · Research Publications (Maastricht University) · doi:10.26481/dis.20240425kv
Cooper, C., & Papadopoulos, K. (2025) · Journal of Bodywork and Movement Therapies · doi:10.1016/j.jbmt.2025.05.048
Kamonseki, D. H., Ribeiro, D. C., Haik, M. N., Ribeiro, L. P., Almeida, R. F., & Camargo, P. R. (2025) · Shoulder & Elbow · doi:10.1177/17585732251354920
Überblick über psychosoziale Kerndomänen bei der Behandlung und Erforschung von Post-COVID
Salzmann, S., Rief, W., & EURONET-SOMA-Gruppe (2025) · Verhaltenstherapie · doi:10.1159/000547743
Kallesøe, K. H., Schröder, A., Wicksell, R. K., Preuss, T., Jensen, J. S., & Rask, C. U. (2020) · Figshare · doi:10.6084/m9.figshare.12986608
Kallesøe, K. H., Schröder, A., Wicksell, R. K., Preuss, T., Jensen, J. S., & Rask, C. U. (2020) · Figshare · doi:10.6084/m9.figshare.12986599
Kallesøe, K. H., Schröder, A., Wicksell, R. K., Preuss, T., Jensen, J. S., & Rask, C. U. (2020) · Figshare · doi:10.6084/m9.figshare.12986602
Kallesøe, K. H., Schröder, A., Wicksell, R. K., Preuss, T., Jensen, J. S., & Rask, C. U. (2020) · Figshare · doi:10.6084/m9.figshare.12986605
Lamm, T. T., Frostholm, L., & Pedersen, H. F. (2026) · Internet Interventions · doi:10.1016/j.invent.2026.100953
Wang, S., Ren, J., Fang, S., Hao, Q., Zhang, Y., Kong, L., & Fang, M. (2026) · Brain and Behavior · doi:10.1002/brb3.71513 · Cited by 1
Exploring illness perception classes in the general population: a latent class analysis †
Thidemann, F., Lamm, T. T., Ørnbøl, E., Wellnitz, K. B., & Frostholm, L. (2026) · Psychology and Health · doi:10.1080/08870446.2026.2739471
Metadata
- Authors
- Chalder, T., Goldsmith, K. A., White, P. D., Sharpe, M., & Pickles, A. R.
- Affiliations
- King's College London (GB)
- Queen Mary University of London (GB)
- University of Oxford (GB)
- Corresponding author
- Chalder, Trudie
- Venue
- The Lancet Psychiatry
- Publisher
- Elsevier BV
- Published
- 2015-02
- Volume
- 2
- Issue
- 2
- Pages
- 141-152
- ISSN
- 2215-0366 (ISSN-L)
- OpenAlex
- W2087736673
- Cited by
- 134
- References
- 34
- Citations by year
- 2026: 6 · 2025: 12 · 2024: 4 · 2023: 5 · 2022: 4 · 2021: 8 · 2020: 15 · 2019: 11 · 2018: 8 · 2017: 20 · 2016: 24 · 2015: 17
- FWCI
- 18.75
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- The Lancet Psychiatry (publishedVersion)
- PubMed (publishedVersion)
- Research Portal (King's College London) (publishedVersion, other-oa)
- Funders
- South London and Maudsley NHS Foundation Trust
- National Institute for Health and Care Research (DRF-2011-04-061)
- Medical Research Council
- Menzies Centre for Australian Studies, King's College London, University of London
- Topics
- Health Sciences › Medicine › Psychiatry and Mental health › Fibromyalgia and Chronic Fatigue Syndrome Research
- Health Sciences › Medicine › Clinical Neurology › Long-Term Effects of COVID-19
- Health Sciences › Health Professions › Physical Therapy, Sports Therapy and Rehabilitation › Musculoskeletal pain and rehabilitation
- Keywords
- chronic fatigue syndrome, cognitive behavioral therapy, graded exercise therapy, specialist care, fear-avoidance beliefs, exercise tolerance, fatigue, physical function, therapeutic mechanisms, mediation analysis, PACE trial, disability, 6-minute walk test, Chalder Fatigue Scale, SF-36 physical function
- MeSH terms
- Humans, Rehabilitation, Fatigue Syndrome, Chronic, Treatment Outcome
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review