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    Progressive exercise compared with best-practice advice, with or without corticosteroid injection, for rotator cuff disorders: the GRASP factorial RCT.

    Hopewell, Sally, Keene, David J, Heine, Peter, Marian, Ioana R, Dritsaki, Melina, Cureton, Lucy, Dutton, Susan J, Dakin, Helen, Carr, Andrew, Hamilton, Willie, Hansen, Zara, Jaggi, Anju, Littlewood, Chris ORCID logoORCID: https://orcid.org/0000-0002-7703-727X, Barker, Karen, Gray, Alastair and Lamb, Sarah E (2021) Progressive exercise compared with best-practice advice, with or without corticosteroid injection, for rotator cuff disorders: the GRASP factorial RCT. Health Technology Assessment, 25 (48). pp. 1-158. ISSN 1366-5278

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    Abstract

    Abstract Background Rotator cuff-related shoulder pain is very common, but there is uncertainty regarding which modes of exercise delivery are optimal and the long-term benefits of corticosteroid injections. Objectives To assess the clinical effectiveness and cost-effectiveness of progressive exercise compared with best-practice physiotherapy advice, with or without corticosteroid injection, in adults with a rotator cuff disorder. Design This was a pragmatic multicentre superiority randomised controlled trial (with a 2 × 2 factorial design). Setting Twenty NHS primary care-based musculoskeletal and related physiotherapy services. Participants Adults aged ≥ 18 years with a new episode of rotator cuff-related shoulder pain in the previous 6 months. Interventions A total of 708 participants were randomised (March 2017–May 2019) by a centralised computer-generated 1 : 1 : 1 : 1 allocation ratio to one of four interventions: (1) progressive exercise (n = 174) (six or fewer physiotherapy sessions), (2) best-practice advice (n = 174) (one physiotherapy session), (3) corticosteroid injection then progressive exercise (n = 182) (six or fewer physiotherapy sessions) or (4) corticosteroid injection then best-practice advice (n = 178) (one physiotherapy session). Main outcome measures The primary outcome was Shoulder Pain and Disability Index (SPADI) score over 12 months. Secondary outcomes included SPADI subdomains, the EuroQol 5 Dimensions, five-level version, sleep disturbance, fear avoidance, pain self-efficacy, return to activity, Global Impression of Treatment and health resource use. Outcomes were collected by postal questionnaires at 8 weeks and at 6 and 12 months. A within-trial economic evaluation was also conducted. The primary analysis was intention to treat. Results Participants had a mean age of 55.5 (standard deviation 13.1) years and 49.3% were female. The mean baseline SPADI score was 54.1 (standard deviation 18.5). Follow-up rates were 91% at 8 weeks and 87% at 6 and 12 months. There was an overall improvement in SPADI score from baseline in each group over time. Over 12 months, there was no evidence of a difference in the SPADI scores between the progressive exercise intervention and the best-practice advice intervention in shoulder pain and function (adjusted mean difference between groups over 12 months –0.66, 99% confidence interval –4.52 to 3.20). There was also no difference in SPADI scores between the progressive exercise intervention and best-practice advice intervention when analysed at the 8-week and 6- and 12-month time points. Injection resulted in improvement in shoulder pain and function at 8 weeks compared with no injection (adjusted mean difference –5.64, 99% confidence interval –9.93 to –1.35), but not when analysed over 12 months (adjusted mean difference –1.11, 99% confidence interval –4.47 to 2.26), or at 6 and 12 months. There were no serious adverse events. In the base-case analysis, adding injection to best-practice advice gained 0.021 quality-adjusted life-years (p = 0.184) and increased the cost by £10 per participant (p = 0.747). Progressive exercise alone was £52 (p = 0.247) more expensive per participant than best-practice advice, and gained 0.019 QALYs (p = 0.220). At a ceiling ratio of £20,000 per quality-adjusted life-year, injection plus best-practice advice had a 54.93% probability of being the most cost-effective treatment. Limitations Participants and physiotherapists were not blinded to group allocation. Twelve-month follow-up may be insufficient for identifying all safety concerns. Conclusions Progressive exercise was not superior to a best-practice advice session with a physiotherapist. Subacromial corticosteroid injection improved shoulder pain and function, but provided only modest short-term benefit. Best-practice advice in combination with corticosteroid injection was expected to be most cost-effective, although there was substantial uncertainty.

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