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The therapeutic efficacy of pulmonary rehabilitation is now well established and supported by a substantial body of clinical trial evidence.1 ,2 The place of pulmonary rehabilitation in the management of chronic obstructive pulmonary disease (COPD) and other chronic respiratory diseases has been enshrined in national and international guidelines including those recently produced by the British Thoracic Society.3 In recent years, attention has shifted from questions regarding the effectiveness of the intervention for those who successfully attend and complete a programme, to meeting challenges for the delivery of pulmonary rehabilitation to the wider population with disabling lung disease. A key driver of this focus is the perception in many quarters that uptake and adherence to rehabilitation is poor, and that a significant minority of patients do not fully respond, or quickly decline, once the programme is completed. As a result, there is considerable interest in developing and testing alternative delivery models of pulmonary rehabilitation and other behavioural interventions that aim to improve general health, knowledge of the disease and promote self-care.
Casey et al4 presents data from the PRINCE study which reports on the delivery of a structured education pulmonary rehabilitation programme (SEPRP) in a primary care setting. This is not the first study of pulmonary rehabilitation in the community,5 ,6 but the PRINCE study has taken an alternative approach. The authors describe a tightly controlled cluster ramdomised controlled trial (RCT) of a rehabilitation intervention versus best usual care in a group of participants with moderate to severe COPD. The authors should be congratulated on conducting such a rigorous randomised controlled trial in a large study population. Participants underwent an 8-week programme, comprising weekly sessions of exercise and education, followed by a telephone call at 4 weeks postdischarge, and a 1 h group meeting at 12 weeks. The overall results, at 12 weeks were mixed; the primary outcome measure, the chronic respiratory disease questionnaire did achieve between group statistical significance, but the confidence intervals overlapped with the minimal clinically important difference for the measure leaving doubts about the importance of the population effect. This lack of clarity in this outcome is in part due to an improvement in health status in the control group, a frequently observed phenomenon in clinical trials. However, the intervention also failed to influence secondary outcomes including exercise tolerance and, overall, these results would have to been seen as rather disappointing when compared with conventional pulmonary rehabilitation and, indeed, to other recent community-based trials.5 ,6 The authors suggest their population might have been ‘too good’, but although their mean performance on the incremental shuttle walking test (ISWT) was slightly higher than has previously been described,7 ,8 values were well below the predicted normal range.9 Similarly, while the responsiveness of exercise testing may vary between populations and between the exercise outcomes frequently reported, there is a substantial body of evidence to suggest that the ISWT is responsive to rehabilitation across a range of disease severities10–12 including less disabled patients.11 ,13 We think it more likely that there was a failure to intervene rather than a failure of the chosen outcome measures to detect an effect.
The novelty of the paper is the approach taken with the educational component. Practice nurses, who potentially have limited knowledge about COPD, were enrolled on a 3-day course on adult education to equip them to deliver the educational package. However, there is now recognition that a collaborative approach to the educational component of rehabilitation, promoting and negotiating behaviour change is needed rather than a more traditional didactic approach. This may require more experience of the rehabilitation process on the part of the practitioner and an appreciation of motivational techniques. Equally, it has been a long held premise of rehabilitation that the programme should be delivered by a multidisciplinary team, and it is usually the educational component that reflects this. The programme would probably have benefitted from wider team involvement, most obviously an occupational therapist and dietician. The education programme appears to have been precisely defined, whereas the exercise programme was more loosely prescribed and did not meet the specified levels described in national or international guidelines where the current recommendation is for at least two supervised sessions a week, with accompanying unsupervised home training sessions.3 ,14
When considering the delivery of pulmonary rehabilitation, there are two perspectives: that of the individual participating and that of the provider organisation. Both would want to facilitate better access to the service but may have a different outlook on the setting, content, supervision and cost of the programme. What, therefore, are the lessons that can be drawn from the PRINCE trial? The aim of pulmonary rehabilitation is to take a disabled patient with individual needs and priorities and provide an individually tailored intervention that improves symptoms and maximises physical and social functioning. The components and setting of rehabilitation may vary, but supervised exercise training conducted at least twice a week has consistently been shown to be the key to its effectiveness. It is possible that the supervision of the intervention that is required to bring about these objectives will vary considerably between patients and, therefore, home-based pulmonary rehabilitation or self-managed exercise programmes may offer an effective alternative for some people. Indeed such innovations may improve access to treatment for some (eg, patients who are still at work) and create capacity for more disabled patients to access formal programmes. Despite reservations about the ‘dose’ of pulmonary rehabilitation provided in the PRINCE trial some individuals might prefer the style and setting of a ‘non-traditional’ intervention, and may accrue important benefits which they might be denied if the only format offered is felt to be unmanageable or impractical by the patient. Offering a diversity of patient treatment choices is self-evidently desirable but this needs to be an informed choice of effective treatment options. One concern with less intensely supervised interventions is that patients may collude in the avoidance of a treatment whose benefits are at least in part dependent on their own individual effort and motivation. Such informed decision making needs to be considered alongside concepts of supported self-management which are central to modern care of long-term conditions. There is evidence that self-management interventions will be effective if they are properly supported and embedded in wider chronic disease management programmes, for example, the Chronic Care Model,15 and pulmonary rehabilitation and supported self-management are key components of such programmes (figure 116). For example, the PRINCE intervention, and indeed any pulmonary rehabilitation intervention, would provide aspects of education, self-management training and supervised exercise.
So what should we call pulmonary rehabilitation and what is self-management? There appears to be a great deal of overlap in the use of this terminology, but one of the defining features of a pulmonary rehabilitation programme is an accurately prescribed exercise programme, with clear markers of progression. To ensure a high-quality service that adheres to national guidance with adequately trained staff, the process of rehabilitation will need to be quality controlled; indeed, some countries have a system of accreditation in place. This process would not seek to limit the delivery of alternative forms of rehabilitation, but there is a threshold which needs to be met based on clear guidance about how to maximise the chance of a beneficial response to the exercise training regime before a programme should be termed pulmonary rehabilitation. These criteria might need to be tempered for different disease or clinical settings (eg, posthospitalisation for acute exacerbation) but quality assurance of individual programmes can be underpinned by rigorous audit of clinical outcomes. Ideally, the facility to stratify and personalise the intensity and setting of support for individual patients would be built into the care provided. Personalised therapy is clearly desirable but requires the tools to support stratification and individual decision making. In the case of pulmonary rehabilitation and self-management programmes, this would require an assessment of a patient's personal resources, education and motivation as well as physical characteristics and disease severity. An understanding of these individual issues would allow the rehabilitation practitioner to titrate the intensity and character of the support provided according to individual needs.
Clinicians and rehabilitation practitioners frequently encounter patients who decline the offer of pulmonary rehabilitation or fail to stay the course. However, in truth, adherence and response rates are comparable to many other health interventions including drug therapies, and despite these frustrations, pulmonary rehabilitation is of clear clinical and economic value.17 ,18 The challenge for the pulmonary rehabilitation community is diversifying patient choice so that access and uptake of therapy is maximised without sacrificing quality and efficacy.
Contributors Both authors contributed equally to the writing of the article.
Competing interests None.
Provenance and peer review Commissioned; internally peer reviewed.