Evaluation of an education and activation programme to prevent chronic shoulder complaints: design of an RCT [ISRCTN71777817]
© Bruijn et al; licensee BioMed Central Ltd. 2005
Received: 07 December 2004
Accepted: 16 February 2005
Published: 16 February 2005
About half of all newly presented episodes of shoulder complaints (SC) in general practice are reported to last for at least six months. Early interventions aimed at the psychological and social determinants of SC are not common in general practice, although such interventions might prevent the development of chronic SC.
The Education and Activation Programme (EAP) consists of an educational part and a time-contingent activation part. The aim of the EAP is to provide patients with the proper cognitions by means of education, and to stimulate adequate behaviour through advice on activities of daily living.
The article describes the design of a randomised clinical trial (RCT) to evaluate the effectiveness and cost-effectiveness of an EAP in addition to usual care, compared to usual care only, in the prevention of chronic SC after six months. It also describes the analysis of the cost and effect balance. Patients suffering from SC for less than three months are recruited in general practice and through open recruitment. A trained general practitioner or a trained therapist administers the EAP.
Primary outcome measures are patient-perceived recovery, measured by self-assessment on a seven-point scale, and functional limitations in activities of daily living. Questionnaires are used to study baseline measures, prognostic measures, process measures and outcome measures.
The inclusion of patients in the study lasted until December 31st 2003. Data collection is to end in June 2004.
Shoulder complaints (SC) have been defined by Sobel & Winters  as pain localised in the region of the deltoid muscle, the acromioclavicular joint, the superior part of the trapezoid muscle and the scapula. Radiation of the pain to the arm as well as limitation of the motion of the upper arm and/or the shoulder girdle may be present .
Musculoskeletal disorders, of which SC constitute the second largest group after low back disorders, account for the second largest share in healthcare costs and represent the largest group of work-related diseases in the Netherlands .
Shoulder complaints in general practice
The point prevalence of SC in the general population in the Netherlands has recently been estimated at 21% . In a British study a lower point prevalence of 14% has been found . The annual incidence of SC as seen by general practitioners (GPs) in the Netherlands lies between 15 and 25 patients per 1000 registered general practice patients. About half of all newly presented episodes in general practice are reported to last for at least six months, while 40 percent of the newly presented episodes result in disability in terms of activities of daily living after one year .
The International Association for the Study of Pain (IASP) regards persistent or recurring pain lasting less than three months as acute pain, whereas more than three months of persistent or recurring pain is considered to be chronic pain . The study by van der Windt  showed that, according to this cut-off criterion, 51% of patients with a newly presented episode of SC in general practice develop chronic SC, that is, complaints lasting more than three months.
The Dutch College of General Practitioners provides clinical guidelines for the treatment of SC . These guidelines, however, do not include treatment aimed at psychosocial factors such as maladaptive behaviour and inadequate cognitions, known to play a role in the development and persistence of chronic musculoskeletal diseases [8–10]. Treatments addressing such factors are mentioned in the guidelines, but only as a last resort, when the biomedical approach has proved ineffective in reducing the pain.
To date, early interventions aimed at the psychological and social determinants of SC are not common in general practice, although such interventions in the early stages of the SC might prevent the development of chronic complaints .
Early intervention in general practice
We hypothesised that an intervention concentrating on psychological and social determinants in the early stages of SC would prevent the development of inadequate cognitions and maladaptive behaviour, ensuring that such inadequate cognitions and behaviour do not play a role in the development of chronic SC later on.
The term cognitions refers to the way patients think about their pain and what the pain means to them, in terms of thoughts, beliefs, attitudes and self-efficacy expectations , whereas behaviour refers to the patients' observable actions .
Patients' cognitions and behaviour should thus be influenced so as to become adequate cognitions and adaptive behaviour. A relatively brief treatment in the early stages of SC, administered by a trained therapist, may be expected to be effective in preventing the development of chronic SC. The Education and Activation Programme (EAP) that formed the subject of the present study is such an early intervention.
Aim of the study
This paper describes the design of a study to evaluate the clinical effectiveness of an early EAP aimed at using psychological and behavioural factors to prevent chronic SC. In addition, the study is to evaluate the balance between costs and effects. EAP in patients with acute SC is to be compared with treatment according to the Dutch College of General Practitioners guidelines. The Medical Ethics Committee of the Institute for Rehabilitations Research in association with Rehabilitation Foundation Limburg has approved the design of the study presented here. Funding was obtained from the Netherlands Organisation for Scientific Research.
This paper describes also the rationale and content of the EAP.
Education and activation programme
Previous studies have indicated that cognitive behavioural therapies aimed at bio-psychosocial factors are promising instruments for the prevention of chronic musculoskeletal pain . The EAP focuses on the same elements as cognitive behavioural therapies, but is applied at an earlier stage than such therapies . Whereas the latter focus mainly on the elimination of inadequate cognitions and maladaptive behaviour after they have already developed in the course of the SC, the EAP focuses on guiding the patient towards adequate pain behaviour and reinforcing this behaviour at an early stage of the SC.
The aim of the EAP is to prevent the development of inadequate cognitions and maladaptive behaviour in patients with acute SC.
Education is used to maintain or induce adequate cognitions by providing information that is tailored to questions that patients have about their SC. Health care educators frequently assume that giving information equals comprehension, which should automatically translate into changed behaviours as the knowledge is applied . According to Hussey, however, simply receiving a message hardly correlates with understanding it . Effective learning also requires the active participation of the patient.
Since inadequate cognitions and maladaptive behaviours are not yet fully developed in patients with acute SC, the focus of the EAP is not on restructuring inadequate cognitions or modifying maladaptive behaviour, but on maintaining or inducing the proper cognitions by education and on maintaining or inducing adequate behaviour by giving advice on activities of daily living. Adequate behaviour is considered to be behaviour in which the patient remains active. A comprehensive description of the EAP is given in the Design section.
Patients are recruited by GPs and in the open population by advertising in local newspapers.
Patients are eligible for inclusion in the Randomised Clinical Trial (RCT) if they consult their own GP or respond to adverts in a local newspaper with a new episode of SC that has lasted no longer than three months, at rest or when elicited by movement in the shoulder area.
• other episodes of SC in the 12 months preceding the consultation with the GP
• prior fractures and/or surgery of the shoulder
• (suspected) referred pain from internal organs
• SC with a confirmed extrinsic cause
• inability to complete a questionnaire independently
• presence of dementia or other severe psychiatric abnormalities
Randomised Clinical Trial
A Randomised Clinical Trial (RCT) with a six-month follow-up is used to evaluate the effectiveness and cost-effectiveness of an EAP to prevent chronicity in patients with acute SC, compared to usual care.
A computer-generated random sequence table is used to randomise the patients to EAP or usual care. Neither the patient nor the GP, nor the trained therapist, can be blinded for the allocated treatment. The trained therapist is also the researcher coordinating the RCT and conducting the data analysis, but is blinded for treatment allocation during the data analysis. The allocation code will be revealed only after the data analysis has been completed.
Usual care (UC) is applied according to the Dutch College of General Practitioners guidelines for SC (version 1999). Management during the first two weeks consists of a wait-and-see policy with information and advice about shoulder complaints, possibly supplemented with analgesics or nonsteroidal anti-inflammatory drugs. If this approach has little or no effect, up to three corticosteroid injections can be given. Physiotherapy is considered for complaints persisting after six weeks or more. If the SC persist, referral to a hospital-based specialist may be considered.
Elements of the education and activation programme
• Information on the origin, nature and prognosis of the SC
• Information on possible interventions and their effects (tailored to the patient's questions and needs)
• Information on the effect of cognitions and behaviour on the perpetuation of the SC
When no alterations in activities have occurred due to the SC
• Positive reinforcement
• Instruction to be aware of possible changes
When alterations in activities have occurred due to the SC
• Identification of up to three altered frequent activities of daily living
• Determination of the desired level of activity and the size of the steps needed to reach this level
The EAP consists of a minimum of two sessions and a maximum of six follow-up sessions over a period of six weeks. Each session may last up to 20 minutes. The first and second sessions are organised in the general practice setting by the trained GP, or at the patient's home by the ambulant EAP therapist. The other sessions are provided by telephone.
The first part of the EAP has an educational purpose, and focuses on information about the origin, nature and prognosis of the SC, possible interventions and their effects, the impact on activities of daily living and its consequences and the patient's own possibility to contribute to recovery. This information is tailored to the patients' questions and needs and is based on the information available in the Dutch College of General Practitioners guidelines for SC.
In addition, the effect of cognitions and behaviour on the perpetuation of the SC is clarified to the patient by an example. If possible, this example refers to a condition or circumstance the patient has experienced, such as a broken bone or back pain. The patient is helped by the trained GP or the trained therapist to explore whether his or her thoughts about the SC are justified. Negative patterns of thinking are modified into adequate and accurate thoughts.
The second part of the EAP consists of a time contingent activation programme, based on the principles of operant learning. It focuses on gradually increasing activities of daily living, despite the pain.
Potential avoidance of activities is countered by reinforcement of continuation or resumption of usual activities.
Positive reinforcement is used to stimulate patients with a normal activity pattern, in spite of their SC, to continue their activities. This positive reinforcement may be enough to achieve continuation of the desired activities . These patients are also instructed to be aware of possible changes in their activities that could lead to undesirable behaviour such as reduced use of the affected shoulder.
Patients who have reduced their normal activities are helped to identify up to three frequent activities of daily living that they have reduced as a result of the SC. These activities are stepwise gradually increased to the desired level of activity in a time-contingent manner. The desired level of activity and the magnitude of the increases are determined and agreed upon by the EAP therapist and the patient.
The patient and the EAP therapist also plan a progress evaluation, which is used to positively reinforce the patient's behaviour if the gradual increase has been correctly implemented or to adjust the magnitude of the increases if the original objectives prove too optimistic.
The first outcome measure is the perceived recovery of the patient. Patients are considered to be recovered when they report to be much improved or fully recovered, on an 7-point ordinal scale, after six months.
Baseline measures T = 0
• Employment status
Specific disease characteristics
• Affected side
• Possible cause of shoulder complaints
• Duration of complaints
• History of shoulder complaints
Treatment credibility and preference
Prognostic measures T = 0
Mobility of glenohumeral joint
• HIB (hand in back), HIN (hand in neck), passive exorotation
• Active and passive abduction
Mobility of cervicothoracal spine
Severity of main complaint
Outcome measures T = 1,2,3
Perceived recovery of complaints Functional limitations to daily activities2
Process measures T = 0,1,2,3
• Fear avoidance and beliefs4
• Coping with pain5
• Internal locus of control5
• External locus of control5
Cost T = 0–26 weeks
Health care utilisation8
Direct non-medical costs
The statistical analysis will be carried out according to the 'intention-to-treat' principle. Differences between groups, with 95% confidence intervals, will be calculated for each outcome measure. The study groups will be compared by an independent samples t-test for changes since baseline for continuous outcome variables and the chi-square test for categorical outcome variables. In addition, the corresponding baseline value for each continuous outcome will be used as a covariate.
The analysis will be repeated taking any loss-to-follow-up into account by applying a sensitivity analysis in which all patients who are lost to follow-up are first considered to show the largest observed improvement and then the largest observed deterioration in outcome measures.
The analyses of the difference in change for the outcomes at three and six months will account for the repeated measures character of the data. Baseline characteristics that are a priori considered to be possible prognostic factors for outcome variables, as well as post-randomisation differences between the groups, will be handled as potential confounders. Their influence will be evaluated by means of multivariable regression analyses. In the case of confounding, adjusted effect estimates will also be reported.
About half of all newly presented episodes of SC in general practice are reported to last for at least six months. A number needed to treat of 4.5 after six months is considered clinically relevant. This implies an absolute reduction of 22% of the proportion of patients with SC after six months. With a two-sided alpha of 0.05 and a statistical power (1-β) of 0.80, 70 patients per treatment group are needed to detect a difference in favour of the EAP compared to usual care after six months.
Embedding in the Dutch Shoulder Disability Study
This RCT is part of the Dutch Shoulder Disability Study, a comprehensive prognostic cohort study on SC, with randomised controlled interventions in subcohorts. The Dutch Shoulder Disability Study is funded by the Netherlands Organisation for Scientific Research (NWO, grant number 904-65-901).
Reasons for publishing a study design
There are several reasons to publish a study design before the results are available. The main reason is that it provides an opportunity to counteract publication bias, that is, the phenomenon whereby a study producing positive results is more likely to be published than a study showing no difference between the study groups , . Hence, if the design is published but not the results, the study can still be included in a systematic review because data can be retrieved from the researcher .
Another reason is that it gives researchers the opportunity to reflect upon the study design independently of the results. When results run counter to the researchers' expectations, methodological flaws are usually examined. But when the results are in line with expectations, methodological flaws are more likely to be overlooked. 
The third reason arises from the tendency among randomised controlled studies to deviate from their original designs, mainly because of practical problems. Such deviations from the study design may affect the study results. Publishing the study design forces researchers to test its implementation and to answer for any deviations from the design.
Finally, this article offers us an opportunity to describe the rationale and content of the intervention in greater detail than the methods section of an article reporting the results of the RCT would do .
Applicability in general practice
The EAP is a brief intervention that can easily be administered by GPs in addition to the usual care according to the guidelines. This might give GPs an instrument to prevent the development of chronic SC in the early stages of the complaints by focusing on psychological and social determinants.
The inclusion of patients in the study lasted until December 31st 2003. Data collection will be completed in June 2004. Currently, 108 patients have been included and are being followed up.
International Association for the Study of Pain
Education and Activation Programme
Randomised Clinical Trial
Camiel De Bruijn
Shoulder Disability Questionnaire
Netherlands Organisation for Scientific Research
- Sobel JS, Winters JC: Shoulder complaints in general practice. 1996, , Rijksuniversiteit GroningenGoogle Scholar
- Picavet HSJ, Gils HWV, Schouten JSAG: Klachten Van Het Bewegingsapparaat In De Nederlandse Bevolking. 2000, Bilthoven, Rijksinstituut voor Volksgezondheid en MilieuGoogle Scholar
- Picavet HSJ, Schouten JSAG: Musculoskeletal Pain in the Netherlands: Prevalences, Consequences and Risk Groups, the DMC(3)-study. Pain. 2003, 102: 167-178. 10.1016/s0304-3959(02)00372-x.View ArticlePubMedGoogle Scholar
- Bongers PM: The Cost of Shoulder Pain at Work. British Medical Journal. 2001, 322: 64-65.View ArticlePubMedPubMed CentralGoogle Scholar
- Windt DA, Koes BW, Boeke AJ, Deville W, Jong BAD, Bouter LM: Shoulder disorders in general practice: prognostic indicators of outcome. Br J Gen Pract. 1996, 46: 519-523.PubMedPubMed CentralGoogle Scholar
- Merskey H, Bogduk N: IASP Pain Terminology. Classification of Chronic Pain. Edited by: Merskey H and Bogduk N. 1994, Seattle, IASP Press, 209-214.Google Scholar
- Winters JC, Jongh ACD, D. A. W. M. van der Windt, Jonquiere M, Winter AFD, G. J. M. G. van der Heijden, Sobel JS, Goudswaard AN: NHG-Standaard Schouderklachten. Huisarts en Wetenschap. 1999, 42: 222-231.Google Scholar
- Linton S: A Systematic Review of Psychological Risk Factors for Back and Neck Pain. Spine. 2000, 25: 1148-1156. 10.1097/00007632-200005010-00017.View ArticlePubMedGoogle Scholar
- Turk DC: The Role of Demographic and Psychosocial Factors in Transition from Acute to Chronic Pain. Edited by: Jensen TS, Turner JA and Z. WH. 1997, IASP Press, 8: 185-213.Google Scholar
- Weiser S, Cedraschi C: Psychosocial Issues In The Prevention Of Chronic Low Back Pain - A Literature Review. Bailliere's Clinical Rheumatology. 1992, 6: 657-684.View ArticlePubMedGoogle Scholar
- Linton SJ: Prevention With Special Reference To Chronic Musculoskeletal Disorders. Psychosocial Factors In Pain. Edited by: Gatchel RJ and Turk DC. 1999, New York, Guilford Publications, 374-389.Google Scholar
- Wit R, Dam F, Litjens M, H. HAS: Assessment of Pain Cognitions in Cancer Patients with Chronic Pain. Journal of Pain and Symptom Management. 2001, 22: 911-924. 10.1016/S0885-3924(01)00354-2.View ArticlePubMedGoogle Scholar
- Fordyce WE: Behavioral Methods For Chronic Pain And Illness. 1976, Saint Louis, C. V. Mosby CompanyGoogle Scholar
- Turner JA, Keefe FJ: Cognitive-Behavioral Therapy For Chronic Pain. Pain; an updated review. Edited by: Max M. 1999, 523-533.Google Scholar
- Davis P, Busch AJ, Lowe JC, Taniguchi J, Djkowich B: Evaluation of a Rheumatoid Arthritis Patient Education Program: Impact on Knowledge and Self-Efficacy. Patient Education And Counseling. 1994, 24: 55-61. 10.1016/0738-3991(94)90025-6.View ArticlePubMedGoogle Scholar
- Hussey LC: Strategies for Effective Patient Education Material Design. Journal of Cardiovascular Nursing. 1997, 11: 37-46.View ArticlePubMedGoogle Scholar
- Padberg RM, Padberg LF: Strengthening the Effectiveness of Patient Education: Applying Principles of Adult Education. Oncol Nurs Forum. 1990, 17: 65-69.PubMedGoogle Scholar
- G. J. M. G. van der Heijden, Leffers P, Bouter LM: Development And Responsiveness Of The Shoulder Disability Questionnaire. J Clin Epidemiol. 1999Google Scholar
- Goossens MEJB, M. P. M. H. Rutten - van Molken, Vlaeyen JWS, S. M. J. P. van der Linden: The Cost Diary: A Method To Measure Direct And Indirect Costs In Cost-Effectiveness Research. Journal of Clinical Epidemiology. 2000, 53: 688-695. 10.1016/S0895-4356(99)00177-8.View ArticlePubMedGoogle Scholar
- Dickersin K: The existence of publication bias and risk factors for its occurrence. JAMA. 1990, 263: 1385-1389. 10.1001/jama.263.10.1385.View ArticlePubMedGoogle Scholar
- Eastbrook PJ, Berlin JA, Gopalan R, Matthews DR: Publication Bias in Clinical Research. Lancet. 1991, 337: 867-872. 10.1016/0140-6736(91)90201-Y.View ArticleGoogle Scholar
- Ostelo RWJG, Koke AJA, Beurskens AJHM, Vet HCW, Kerckhoffs MR, Vlaeyen JWS, Wolters PMJC, Berfelo WM, Brandt PA: Behavioral-graded Activity Compared with Usual Care after First-time Disk Surgery: Considerations of The Design of a Randomized Clinical Trial. J Manipulative Physiol Ther. 2000, 23: 312-319.PubMedGoogle Scholar
- The pre-publication history for this paper can be accessed here:http://www.biomedcentral.com/1471-2296/6/7/prepub
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