Mitchell C, Adebajo A, Hay E and Carr A. Shoulder pain: diagnosis and management in primary care. BMJ. 2005;331:1124-8.
 Virta L, Joranger P, Brox JI and Eriksson R. Costs of shoulder pain and resource use in primary health care: a cost-of-illness study in Sweden. BMC Musculoskelet Disord. 2012;13:17,2474-13-17.
 van der Molen HF, Foresti C, Daams JG, Frings-Dresen MHW and Kuijer PPFM. Work-related risk factors for specific shoulder disorders: a systematic review and meta-analysis. Occup Environ Med. 2017;74:745–55.
 Dalbøge A, Svendsen SW, Frost P, Andersen JH. Association between occupational mechanical exposures and subacromial impingement syndrome: a reference document. Danish Working Environment Authority. 2018. https://www.aes.dk/-/media/3EA35B61FFE3472EA738F8F4B909BCA7.ashx. Accessed 22 Jan 2019.
 Dalbøge A, Frost P, Andersen JH and Svendsen SW. Cumulative occupational shoulder exposures and surgery for subacromial impingement syndrome: a nationwide Danish cohort study. Occup Environ Med. 2014;71:750–6.
 Dalbøge A, Frost P, Andersen JH and Svendsen SW. Surgery for subacromial impingement syndrome in relation to occupational exposures, lifestyle factors and diabetes mellitus: a nationwide nested case-control study. Occup Environ Med. 2017;74:728–36.
 Dalbøge A, Frost P, Andersen JH and Svendsen SW. Surgery for subacromial impingement syndrome in relation to intensities of occupational mechanical exposures across 10-year exposure time windows. Occup Environ Med. 2018;75:176–82.
 Svendsen SW, Dalbøge A, Andersen JH, Thomsen JF and Frost P. Risk of surgery for subacromial impingement syndrome in relation to neck-shoulder complaints and occupational biomechanical exposures: a longitudinal study. Scand J Work Environ Health. 2013;39:568–77.
 Sundhedsstyrelsen. National klinisk retningslinje for diagnostik og behandling af patienter med udvalgte skulderlidelser. København: Sundhedsstyrelsen; 2013.
 Sundhedsstyrelsen, Sygehusbehandling og Beredskab. Impingementsyndrom/rotator cuff-syndrom og traumatisk rotator cuff-ruptur. Del 2: Faglige Visitationsretningslinjer. København: Sundhedsstyrelsen, Sygehusbehandling og Beredskab; 2011.
 Løvschall C, Witt F, Svendsen SW, Hartvigsen J, Johannsen HV, Beck SS, et al. Medicinsk teknologivurdering af kirurgisk behandling af patienter med udvalgte og hyppige skulderlidelser. Århus: MTV og Sundhedstjeneste forskning, Region Midtjylland; 2011.
 Kjærsgaard-Andersen AM, Østergaard M, Høybye MT, Jørgensen LB (2014) "Et interaktivt skulderløft". 2014. http://www.hospitalsenhedmidt.dk/afdelinger-og-centre/center-for-planlagt-kirurgi/forskningsenheden/publikationer/. Accessed 27 Dec 2018.
 Christensen FB, Laurberg I and Bünger CE. Importance of the back-cafe concept to rehabilitation after lumbar spinal fusion: a randomized clinical study with a 2-year follow-up. Spine (Phila Pa 1976). 2003;28:2561–9.
 Chan AW, Tetzlaff JM, Gotzsche PC, Altman DG, Mann H, Berlin JA, et al. SPIRIT 2013 explanation and elaboration: guidance for protocols of clinical trials. BMJ. 2013; 158:200–7.
 Hoffmann TC, Glasziou PP, Boutron I, Milne R, Perera R, Moher D, et al. Better reporting of interventions: template for intervention description and replication (TIDieR) checklist and guide. BMJ. 2014;348:g1687.
 Dalbøge A, Hansson GA, Frost P, Andersen JH, Heilskov-Hansen T and Svendsen SW. Upper arm elevation and repetitive shoulder movements: a general population job exposure matrix based on expert ratings and technical measurements. Occup Environ Med. 2016;73:553–60.
 Dawson J, Fitzpatrick R and Carr A. Questionnaire on the perceptions of patients about shoulder surgery. J Bone Joint Surg Br. 1996;78:593–600.
 Dawson J, Rogers K, Fitzpatrick R and Carr A. The Oxford Shoulder Score revisited. Arch Orthop Trauma Surg. 2009;129:119–23.
 Frich LH, Noergaard PM and Brorson S. Validation of the Danish version of Oxford Shoulder Score. Dan Med Bull. 2011;58: A4335.
 McLean JM, Awwad D, Lisle R, Besanko J, Shivakkumar D and Leith J. An international, multicenter cohort study comparing 6 shoulder clinical scores in an asymptomatic population. J Shoulder Elbow Surg. 2018;27:306–14.
 Younis F, Sultan J, Dix S and Hughes PJ. The range of the Oxford Shoulder Score in the asymptomatic population: a marker for post-operative improvement. Ann R Coll Surg Engl. 2011;93:629–33.
 Craig P, Dieppe P, Macintyre S, Michie S, Nazareth I, Petticrew M, et al. Developing and evaluating complex interventions: the new Medical Research Council guidance. BMJ. 2008;337: a1655.
 Littlewood C, Bateman M, Brown K, Bury J, Mawson S, May S, et al. A self-managed single exercise programme versus usual physiotherapy treatment for rotator cuff tendinopathy: a randomised controlled trial (the SELF study). Clin Rehabil. 2016;30:686–96.
 Christiansen DH, Frost P, Falla D, Haahr JP, Frich LH, Andrea LC, et al. Effectiveness of standardized physical therapy exercises for patients with difficulty returning to usual activities after decompression surgery for subacromial impingement syndrome: randomized controlled trial. Phys Ther. 2016;96:787–96.
 Ingwersen KG, Jensen SL, Sørensen L, Jørgensen HR, Christensen R, Søgaard K, et al. Three months of progressive high-load versus traditional low-load strength training among patients with rotator cuff tendinopathy: primary results from the double-blind randomized controlled RoCTEx trial. Orthop J Sports Med. 2017;5:8:2325967117723292,
 Holmgren T, Hallgren HB, Öberg B, Adolfsson L and Johansson K. Effect of specific exercise strategy on need for surgery in patients with subacromial impingement syndrome: randomised controlled study. BMJ. 2012;344:e787.
 Page MJ, Green S, McBain B, Surace SJ, Deitch J, Lyttle N, et al. Manual therapy and exercise for rotator cuff disease. Cochrane Database Syst Rev. 2016;(6):CD012224.
 Littlewood C, Ashton J, Chance-Larsen K, May S and Sturrock B. Exercise for rotator cuff tendinopathy: a systematic review. Physiotherapy. 2012;98:101–9.
 Hanratty CE, McVeigh JG, Kerr DP, Basford JR, Finch MB, Pendleton A, et al. The effectiveness of physiotherapy exercises in subacromial impingement syndrome: a systematic review and meta-analysis. Semin Arthritis Rheum. 2012;42:297–316.
 Klintberg IH, Cools AM, Holmgren TM, Holzhausen AC, Johansson K, Maenhout AG, et al. Consensus for physiotherapy for shoulder pain. Int Orthop. 2015;39:715–20.
 Desmeules F, Boudreault J, Dionne CE, Fremont P, Lowry V, MacDermid JC, et al. Efficacy of exercise therapy in workers with rotator cuff tendinopathy: a systematic review. J Occup Health. 2016;58:389–403.
 Peterson MD, Rhea MR and Alvar BA. Applications of the dose-response for muscular strength development: a review of meta-analytic efficacy and reliability for designing training prescription. J Strength Cond Res. 2005;19:950–8.
 Babatunde FO, MacDermid JC and MacIntyre N. A therapist-focused knowledge translation intervention for improving patient adherence in musculoskeletal physiotherapy practice. Arch Physiother. 2017;7:1.
 Axivity. https://www.axivity.com. Accessed 15 January 2019.
 Borg GA. Psychophysical bases of perceived exertion. Med Sci Sports Exerc. 1982;14:377–81.
 Brox JI. Regional musculoskeletal conditions: shoulder pain. Best Pract Res Clin Rheumatol. 2003;17:33–56.
 Rosdahl G. Den Motiverende samtale i teori og praksis. 1. udgave, 2. oplag, ed. Copenhagen: Munksgaard; 2013.
 Glanz K, Rimer BK, Lewis FM. Health behavior and health education, theory, research, and practice. 3rd ed. San Francisco: Jossey-Bass; 2002.
 Savinainen M and Oksa P. Efficiency of workplace surveys conducted by Finnish occupational health services. AAOHN J. 2011;59:303–10.
 Deshpande PR, Rajan S, Sudeepthi BL and Abdul Nazir CP. Patient-reported outcomes: a new era in clinical research. Perspect Clin Res. 2011;2:137–44.
 Dawson J, Harris KK, Doll H, Fitzpatrick R and Carr A. A comparison of the Oxford Shoulder Score and shoulder pain and disability index: factor structure in the context of a large randomized controlled trial. Patient Relat Outcome Meas. 2016;7:195–203.
 Dawson J, Hill G, Fitzpatrick R and Carr A. Comparison of clinical and patient-based measures to assess medium-term outcomes following shoulder surgery for disorders of the rotator cuff. Arthritis Rheum. 2002;47:513–9.
 Ekeberg OM, Bautz-Holter E, Keller A, Tveita EK, Juel NG and Brox JI. A questionnaire found disease-specific WORC index is not more responsive than SPADI and OSS in rotator cuff disease. J Clin Epidemiol. 2010;63:575–84.
 Ekeberg OM, Bautz-Holter E, Tveita EK, Keller A, Juel NG and Brox JI. Agreement, reliability and validity in 3 shoulder questionnaires in patients with rotator cuff disease. BMC Musculoskelet Disord. 2008;9:68,2474-9–68.
 Schmidt S, Ferrer M, Gonzalez M, Gonzalez N, Valderas JM, Alonso J, et al. Evaluation of shoulder-specific patient-reported outcome measures: a systematic and standardized comparison of available evidence. J Shoulder Elbow Surg. 2014;23:434–44.
 Waddell G, Newton M, Henderson I, Somerville D and Main CJ. A Fear-Avoidance Beliefs Questionnaire (FABQ) and the role of fear-avoidance beliefs in chronic low back pain and disability. Pain. 1993;52:157–68.
 Mintken PE, Cleland JA, Whitman JM and George SZ. Psychometric properties of the Fear-Avoidance Beliefs Questionnaire and Tampa Scale of Kinesiophobia in patients with shoulder pain. Arch Phys Med Rehabil. 2010;91:1128–36.
 Turk DC and Wilson HD. Fear of pain as a prognostic factor in chronic pain: conceptual models, assessment, and treatment implications. Curr Pain Headache Rep. 2010;14:88–95.
 Severeijns R, Vlaeyen JW, van den Hout MA and Picavet HS. Pain catastrophizing and consequences of musculoskeletal pain: a prospective study in the Dutch community. J Pain. 2005;6:125–32.
 George SZ and Stryker SE. Fear-avoidance beliefs and clinical outcomes for patients seeking outpatient physical therapy for musculoskeletal pain conditions. J Orthop Sports Phys Ther. 2011;41:249–59.
 Hurst H and Bolton J. Assessing the clinical significance of change scores recorded on subjective outcome measures. J Manipulative Physiol Ther. 2004;27:26–35.
 Herup A, Merser S and Boeckstyns M. Validation of questionnaire for conditions of the upper extremity. Ugeskr Laeger. 2010;172:3333–6.
 EuroQol Group. EuroQol--a new facility for the measurement of health-related quality of life. Health Policy. 1990;16:199–208.
 Ahlstrom L, Grimby-Ekman A, Hagberg M and Dellve L. The work ability index and single-item question: associations with sick leave, symptoms, and health-- a prospective study of women on long-term sick leave. Scand J Work Environ Health. 2010;36(5):404-12.
 Gould R, Ilmarinen J, Järvisalo J, Koskinen S, editor. Dimensions of work ability. Results for the Health 2000 Survey. Helsinki: Finnish Centre for Pensions, 2008.
 Karasek R, Theorell T. Healthy work: stress, productivity, and the reconstruction of working life. Basic Books, New York, 1990.
 Rathleff MS, Bandholm T, Ahrendt P, Olesen JL and Thorborg K. Novel stretch-sensor technology allows quantification of adherence and quality of home-exercises: a validation study. Br J Sports Med. 2014;48:724–8.
 Rathleff MS, Thorborg K, Rode LA, McGirr KA, Sørensen AS, Bøgild A, et al. Adherence to commonly prescribed, home-based strength training exercises for the lower extremity can be objectively monitored using the Bandcizer. J Strength Cond Res. 2015;29:627–36.
 McGirr K, Harring SI, Kennedy TS, Pedersen MF, Hirata RP, Thorborg K, et al. An elastic exercise band mounted with a Bandcizer can differentiate between commonly prescribed home exercises for the shoulder. Int J Sports Phys Ther. 2015;10:332–40.
 PostNord. http://www.postnordscanning.dk. Accessed 14 Dec 2018.
 Christiansen DH, Frost P, Falla D, Haahr JP, Frich LH and Svendsen SW. Responsiveness and minimal clinically important change: a comparison between 2 shoulder outcome measures. J Orthop Sports Phys Ther. 2015;45:620–5.
 Beard D, Rees J, Rombach I, Cooper C, Cook J, Merritt N, et al. The CSAW Study (Can Shoulder Arthroscopy Work?) - a placebo-controlled surgical intervention trial assessing the clinical and cost effectiveness of arthroscopic subacromial decompression for shoulder pain: study protocol for a randomised controlled trial. Trials. 2015;16:210-015-0725-y,
 Campbell MK, Piaggio G, Elbourne DR, Altman DG and CONSORT Group. Consort 2010 statement: extension to cluster randomised trials. BMJ. 2012;345:e5661,
 Adams G, Gulliford MC, Ukoumunne OC, Eldridge S, Chinn S and Campbell MJ. Patterns of intra-cluster correlation from primary care research to inform study design and analysis. J Clin Epidemiol. 2004;57:785–94.
 Saunders RP, Evans MH and Joshi P. Developing a process-evaluation plan for assessing health promotion program implementation: a how-to guide. Health Promot Pract. 2005;6:134–47.
 Green J, Tones K, Cross R, Woodall J. Health promotion – planning & strategies. 3.ed, London, Sage publications ltd, 2015.
 Christensen U, Schmidt L, Dyhr L. The qualitative research interview. In: Vallgårda S, Koch L, editors. Research Methods in Public Health. Copenhagen: Munksgaard; 2008.
 Tjørnhøj-Thomsen T, Whyte S. Fieldwork and participant observation. In: Vallgårda S, Koch L, editors. Research Methods in Public Health. Copenhagen: Munksgaard; 2008.
 Heron SR, Woby SR and Thompson DP. Comparison of three types of exercise in the treatment of rotator cuff tendinopathy/shoulder impingement syndrome: a randomized controlled trial. Physiotherapy. 2017;103:167–73.
 Kuhn JE. Exercise in the treatment of rotator cuff impingement: a systematic review and a synthesized evidence-based rehabilitation protocol. J Shoulder Elbow Surg. 2009;18:138–60.
 Hoe VC, Urquhart DM, Kelsall HL and Sim MR. Ergonomic design and training for preventing work-related musculoskeletal disorders of the upper limb and neck in adults. Cochrane Database Syst Rev. 2012;(8):CD008570
 Van Eerd D, Munhall C, Irvin E, Rempel D, Brewer S, van der Beek AJ, et al. Effectiveness of workplace interventions in the prevention of upper extremity musculoskeletal disorders and symptoms: an update of the evidence. Occup Environ Med. 2016;73:62–70.
 Verhagen AP, Bierma-Zeinstra SM, Burdorf A, Stynes SM, de Vet HC and Koes BW. Conservative interventions for treating work-related complaints of the arm, neck or shoulder in adults. Cochrane Database Syst Rev. 2013;(12):CD008742.
 Sundstrup E, Jakobsen MD, Andersen CH, Jay K, Persson R, Aagaard P, et al. Effect of two contrasting interventions on upper limb chronic pain and disability: a randomized controlled trial. Pain Physician. 2014;17:145–54.