3) The rebuttal:
It is not our understanding/interpretation of the literature that CBT for chronic fatigue is based historically on the fear avoidance model. Although there are certainly parallel concepts, we believe this is a mischaracterization.
CBT for CFS was introduced by the research team of Simon Wessely at Kings College. They explicitly stated that “the rationale for cognitive behavioural therapy is based on a fear avoidance model”. [1] In the first trial of CBT in CFS, the authors made reference to the treatment of avoidance behavior in chronic pain. They described the model behind their approach as follows:
“Avoidant behaviour (which is reinforced by the advice currently offered to patients) sustains symptoms, by decreasing activity tolerance and increasing sensitivity to any stimulation, as does associated mood disorder. Re-exposure to activity causes more symptoms, and more fear. The result is a vicious circle of symptoms, avoidance, fatigue, demoralisation and depression-the clinical picture of CFS. A similar role for avoidance in perpetuating symptoms has been implicated in chronic pain.”[2]
According to Stahl et al. [3], who’ve studied CBT in adolescent CFS patients, “CBT for CFS is based on a fear avoidance beliefs model about physical activity.” In the largest RCT, the PACE-trial, “CBT was done on the basis of the fear avoidance theory of chronic fatigue syndrome.” [4]
Similarly, we believe it is a mischaracterization to claim that CBT for CFS is primarily graded activation or that modern CBT protocols focus largely on challenging somatic attributions.
It should be noted that I made neither of these claims in my letter and merely mentioned that both aspects of CBT for CFS have proven to be controversial in the past. It is untenable to claim that graded activation is not a central element of CBT in CFS. As explained by Wessely and colleagues:
“At, the heart of CBT is a behavioral approach to the impairment of activity that is part of the definition of CFS. Other benefits, such as those on morale, fatigue, mood, sleep, and symptoms follow, but the primary aim of treatment is to restore activity.” [5]
Similarly, challenging somatic attributions was a central aspect of the CBT for example in the model proposed by the research group at Nijmegen University. According to Vercoulen et al.:
“Attributing complaints to an organic cause may reinforce the idea that physical activity is harmful and result in avoidance of physical activity. Attributing complaints to a somatic cause may also lead to low sense of control over symptoms, which in turn may produce mood disorder.” [6]
Consequently, the CBT-model aimed to increase physical activity and to decrease somatic attributions.
Related, graded activation is far from universally effective, however the literature suggests that it is helpful for many, if not most, individuals in major the studies reported in the literature. The claim that it is generally detrimental then also seems unfounded.
My letter doesn’t claim that graded activation is generally detrimental. It refers to the symptom of post-exertional malaise and patient surveys reporting harms of CBT. Both arguments suggest that graded activation can be counterproductive in patients with CFS.
More generally, CBT is the established evidence-based treatment approach for CFS, and we disagree with your characterization of the use of CBT as proliferating “inappropriate treatment advice,” which we feel is an unfounded statement given the context of the entire CBT for CFS literature.
Challenging somatic attributions in CFS - which the CDC currently describes as “a biological illness, not a psychologic disorder” - is considered inappropriate and has now been removed from most CBT-models for CFS. Similarly, due to post-exertional malaise, some CFS patients might tolerate graded activity programs poorly. These issues are discussed by Friedman [7], Geraghty & Blease [8] and into more detail in the recent paper: “The ‘cognitive behavioural model’ of chronic fatigue syndrome: Critique of a flawed model.” [9]
According to a recent editorial by Kenneth J. Friedman “mischaracterization of ME/CFS has led to inappropriate and, for some, harmful treatment options. Characterization of ME/CFS as a psychosomatic illness has led to the belief that cognitive behavioral therapy (CBT) and graded exercise therapy (GET) are therapeutic if not curative. The publications demonstrating the therapeutic and potentially curative values of CBT and GET have now been challenged. Attempts to correct the literature are currently underway.”[10]
Your description of acceptance is extremely narrow, and as is such is a mischaracterization of acceptance-based treatment (“accepting the feeling of discomfort”), which typically involved targeting several interrelated processes, only one of which is acceptance. The authors present a model based on psychological flexibility, of which acceptance is a single component. In the psychological flexibility model, as explained by the authors, acceptance is a vehicle specifically for values-based behavior change, not a skill to be applied to tolerance of physical pain for no purpose.
My commentary focused only on the aspects of ACT that may not be appropriate in the CFS patient population. In the trial by Jonsjo et al., “an unwillingness to experience discomfort” was considered to “decrease tolerance to bodily symptoms” and patients “were encouraged to decrease behaviors aimed at avoiding or reducing discomfort.” Due to post-exertional malaise this may not be adequate treatment advice for CFS patients.
As an alternative to challenging experiential avoidance, I proposed that “learning to accept the confines of this illness might reorient attention towards activities that are still possible and meaningful to the patient”, in other words, a value-based behavior change.
The authors point out that acceptance is used as an approach to “…discomfort that cannot be readily reduced or removed…” As is such, it is not inconsistent with an approach that aims to lower or reduce discomfort when that is possible, nor would it be presented as an alternative to reducing or managing discomfort that can be reduced or managed through other methods, and the authors certainly do not recommend that.
This is incorrect. The authors do present ACT as an alternative to reducing or managing discomfort that can be reduced or managed through other methods. These alternative strategies are explicitly described as maladaptive. According to Jonsjo et al., in ACT “strategies to avoid or reduce experiences of symptoms and distress (i.e. experiential avoidance) restrict activities and thereby reduce the possibility to live a broad and satisfactory life.” As discussed in my commentary, no evidence is provided for this statement in CFS patients.
You criticize the use of the phrase “…were encouraged to decrease behaviors aimed at reducing or avoiding discomfort” without acknowledging the full context of the treatment intervention. Of great importance, there is a whole intervention module aimed at using the patient’s own experience to allow the patient to identify where pain management strategies have worked for them and where they have not. Thus, “decreasing behaviors aimed to lower or reduce discomfort” specifically refers to such behaviors that the patient has identified as being ineffective and/or as preventing them from achieving desired life goals/ends. Thus, your criticism is misguided and also seems intentionally crafted as a straw-man argument.
In ACT experiential avoidance, is considered to “reduce the possibility to live a broad and satisfactory life.” In contrast, CFS patients might have experienced this strategy to be helpful. Strategies to avoid or reduce symptoms are used in an activity management strategy called “pacing”, as described in a consensus document by Goudsmit et al. [11]. In patient surveys pacing is considered the most acceptable and preferred form of activity management for people with CFS. Consequently, there is a direct conflict between the assumptions of ACT in the trial by Jonsjo et al. and the experiences of many CFS patients. My commentary was intended to bring this conflict to the authors' attention.
References
[1] Deale A, Chalder T, Wessely S. Commentary on: randomised, double-blind, placebo-controlled trial of fluoxetine and graded exercise for chronic fatigue syndrome. Br J Psychiatry. 1998 Jun;172:491-2.
https://www.ncbi.nlm.nih.gov/pubmed/9828988
[2] Butler S, Chalder T, Ron M, Wessely S. Cognitive behaviour therapy in chronic fatigue syndrome. J Neurol Neurosurg Psychiatry. 1991 Feb;54(2):153-8.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1014351/pdf/jnnpsyc00500-0053.pdf
[3] Stahl D, Rimes KA, Chalder T. Mechanisms of change underlying the efficacy of cognitive behaviour therapy for chronic fatigue syndrome in a specialist clinic: a mediation analysis. Psychol Med. 2014 Apr;44(6):1331-44.
https://www.ncbi.nlm.nih.gov/pubmed/23931831
[4] White PD, Goldsmith KA, Johnson AL, Potts L, Walwyn R, DeCesare JC, et al. Comparison of adaptive pacing therapy, cognitive behaviour therapy, graded exercise therapy, and specialist medical care for chronic fatigue syndrome (PACE): a randomised trial. Lancet. 2011 Mar 5;377(9768):823-36.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3065633/
[5] Chalder T, Deale A, Wessely S, Marks I. Cognitive behavior therapy for chronic fatigue syndrome. Am J Med. 1995 Apr;98(4):419-20; author reply 421-2.
https://www.amjmed.com/article/S0002-9343(99)80332-5/pdf
[6] Vercoulen JH, Swanink CM, Galama JM, Fennis JF, Jongen PJ, Hommes OR, et al. The persistence of fatigue in chronic fatigue syndrome and multiple sclerosis: development of a model. J Psychosom Res. 1998 Dec;45(6):507-17.
https://www.ncbi.nlm.nih.gov/pubmed/9859853
[7] Friedberg F. Cognitive-behavior therapy: why is it so vilified in the chronic fatigue syndrome community? Fatigue. 2016;4(3):127–131.
https://www.tandfonline.com/doi/pdf/10.1080/21641846.2016.1200884?needAccess=true
[8] Geraghty KJ, Blease C. Cognitive behavioural therapy in the treatment of chronic fatigue syndrome: A narrative review on efficacy and informed consent. J Health Psychol. 2018 Jan;23(1):127-138.
https://www.ncbi.nlm.nih.gov/pubmed/27634687
[9] Geraghty KJ, Jason LA, Sunnquist M, Tuller T, Blease C, Adenji C. J Health Psychol. 2019: 1–14.
https://journals.sagepub.com/doi/pdf/10.1177/2055102919838907
[10] Friedman KJ. Advances in ME/CFS: Past, Present, and Future. Front. Pediatr. 7:131.
https://www.frontiersin.org/articles/10.3389/fped.2019.00131/full
[11] Goudsmit EM, Nijs J, Jason LA, Wallman KE. Pacing as a strategy to improve energy management in myalgic encephalomyelitis/chronic fatigue syndrome: a consensus document. Disabil Rehabil. 2012;34(13):1140-7.
https://www.ncbi.nlm.nih.gov/pubmed/22181560