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Background The extra benefit of a programme of physiotherapy in addition to advice alone, following first-time traumatic shoulder dislocation, is uncertain. We compared the clinical and cost-effectiveness of a single session of advice with a single session of advice and a programme of physiotherapy. Objective The primary objective was to quantify and draw inferences about observed differences in the Oxford Shoulder Instability Score between the trial treatment groups 6 months post randomisation, in adults with a first-time traumatic shoulder dislocation. Design A pragmatic, multicentre, superiority, randomised controlled trial with embedded qualitative study. Setting Forty-one hospitals in the UK NHS. Participants Adults with a radiologically confirmed first-time traumatic anterior shoulder dislocation, being managed non-operatively. People with neurovascular complications or bilateral dislocations, and those unable to adhere to trial procedures or unable to attend physiotherapy within 6 weeks of injury, or who had previously been randomised, were excluded. Interventions All participants received the same initial shoulder examination followed by advice to aid self-management, lasting up to 1 hour and administered by a physiotherapist (control). Participants randomised to receive an additional programme of physiotherapy were offered sessions lasting for up to 30 minutes, over a maximum duration of 4 months from the date of randomisation (intervention). Main outcome measures The primary outcome measure was the Oxford Shoulder Instability Score. This is a self-completed outcome measure containing 12 questions (0–4 points each), with possible scores from 0 (worst function) to 48 (best function). Measurements were collected at 6 weeks, 3 months, 6 months and 12 months by postal questionnaire; 6 months was the primary outcome time point. The primary health outcome for economic evaluation was the quality-adjusted life-year, in accordance with National Institute of Health and Care Excellence guidelines. Results Between 14 November 2018 and 14 March 2022, 482 participants were randomised to advice (n = 240) or advice and a programme of physiotherapy (n = 242). Participants were 34% female, with a mean age of 45 years, and treatment arms were balanced at baseline. There was not a statistically significant difference in the primary outcome between advice only and advice plus a programme of physiotherapy at 6 months for the primary intention-to-treat adjusted analysis (favours physiotherapy: 1.5, 95% confidence interval −0.3 to 3.5) or at earlier 3-month and 6-week time points on the Oxford Shoulder Instability Score (0–48; higher scores indicate better function). The probability of physiotherapy being cost-effective at a willingness-to-pay threshold of £30,000 was 0.95. Conclusions We found little difference in the primary outcome or other secondary outcomes. Advice with additional physiotherapy sessions was found likely to be cost-effective. However, small imprecise incremental costs and quality-adjusted life-years raise questions on whether it is the best use of scarce physiotherapy resources given current service demands. Limitations Loss to follow-up was 27%; however, the observed standard deviation was much smaller than anticipated. These changes in parameters reduced the number of participants required to observe the planned target difference of four points. Our post hoc sensitivity analysis, accounting for missing data, gives similar results. Future work Further research should be directed towards optimising self-management strategies. Study registration This study is registered as ISRCTN63184243. Funding This award was funded by the National Institute for Health and Care Research (NIHR) Health Technology Assessment programme (NIHR award ref: 16/167/56) and is published in full in Health Technology Assessment; Vol. 28, No. 22. See the NIHR Funding and Awards website for further award information. Plain language summary The shoulder dislocates (comes out of its socket joint) when the upper end of the arm bone is forced out during an injury. This common problem occurs mostly in men in their 20s and women aged over 80. After the bone is put back in its socket, most people are managed with physiotherapy. In the United Kingdom, once the bone is back in its socket, there is a range of physiotherapy provision: some hospitals offer advice, and some offer advice and a course of additional physiotherapy sessions. We compared advice alone to advice and physiotherapy for people who had a shoulder that had come out of its joint for the first time. Physiotherapy advice and additional sessions included education about the injury and exercises to move and strengthen the shoulder. When we started this project, this was the first time these two treatments had been compared. Our aim was to compare what activities the two groups could do 6 months after injury via a questionnaire. We also compared quality of life and the cost of rehabilitation at 6 weeks, 3 months, 6 months and 12 months after injury. Adults with a shoulder out of its joint and who were not having surgery were asked to take part. All adults who were eligible and consented to take part were assigned, by chance, to either a single session of advice or the same session followed by physiotherapy. Between 14 November 2018 and 14 March 2022 we collected data on 482 people, from 41 NHS sites across the UK. We found at 6 months there was little evidence that additional physiotherapy was better, when compared to advice alone. Cost-effectiveness analysis (comparing changes in costs and quality of life) suggests additional physiotherapy might provide value for money. However, the changes involved are small and uncertain. Scientific summary Background The shoulder is the most frequently dislocated joint; dislocation occurs in 8.2–23.9 per 100,000 people per year, and 95% of these are anterior dislocations [Brownson P, Donaldson O, Fox M, Rees JL, Rangan A, Jaggi A, et al. BESS/BOA Patient Care Pathways: Traumatic anterior shoulder instability. Shoulder Elbow 2015;7(3):214–26]. They occur when excessive forces during a traumatic event displace the humeral head frontwards, out of the shoulder socket (glenoid fossa), resulting in the joint surfaces completely losing contact [Brownson et al. 2015; Hanchard NC, Goodchild LM, Kottam L. Conservative management following closed reduction of traumatic anterior dislocation of the shoulder. Cochrane Database Syst Rev 2014;(4):CD004962; Berendes TD, Pilot P, Nagels J, Vochteloo AJ, Nelissen RG. Survey on the management of acute first-time anterior shoulder dislocation amongst Dutch public hospitals. Arch Orthop Trauma Surg 2015;135(4):447–54]. People with a traumatic anterior shoulder dislocation (TASD) may have ongoing pain, disability and substantial morbidity linked to high recurrence rates and subsequent need for repeated episodes of management (Brownson et al. 2015; Hanchard et al. 2014; Berendes et al. 2015). Re-dislocation following a first-time traumatic event typically occurs within 12 months of the index dislocation [Zacchilli MA, Owens BD. Epidemiology of shoulder dislocations presenting to emergency departments in the United States. J Bone Joint Surg Am 2010;92(3):542–9]. Rehabilitation may reduce ongoing re-dislocations and restore a functional, painless and stable shoulder through early restoration of joint movement and promotion of exercises to retrain muscles to maintain stability (Hanchard et al. 2014). However, a 2014 Cochrane review did not find an evidence base to support this (Hanchard et al. 2014). Dutch national guidelines explicitly state no referral to physiotherapy should be made, and UK guidelines cite referral ‘may be helpful’ (Brownson et al. 2015; Berendes et al. 2015). Consequently, the nature and extent of physiotherapy required for the management of patients following TASD are unclear. A typical course of six physiotherapy sessions costs around £378; a single assessment and advice session costs £63 (NHS Reference cost). In addition to the cost of providing a physiotherapy service, there was a clear message from our patient workshop that attending a typical course of six sessions of physiotherapy is burdensome. Younger people may need to take time from work or arrange care for dependents, while older people may find travel challenging, particularly if unable to drive following the dislocation. For both groups, this can be time-consuming and costly. If a single advice session were all that is required, it would have a positive impact on patient experience after TASD, lessening the burden on patients and their friends and families. Consequently, a course of supervised, tailored physiotherapy needs to be of clear additional benefit, when compared to a single session of advice, if it is to be implemented as standard care in the NHS. There is no clinical consensus or high-quality evidence on how best to manage TASDs (Brownson et al. 2015). Objective The primary objective was to test a single session of advice and physiotherapy versus a single session of advice only, for adults with first-time TASD managed non-operatively at 6 months using the Oxford Shoulder Instability Score (OSIS). Methods Design A UK multicentre, two-arm, parallel group, superiority, randomised controlled trial (RCT) with 1 : 1 treatment allocation, across 41 NHS sites, with embedded qualitative study. A protocol paper has been previously published [Kearney RS, Dhanjal G, Parsons N, Ellard D, Parsons H, Haque A, et al. Acute Rehabilitation following Traumatic anterior shoulder dISlocAtioN (ARTISAN): protocol for a multicentre randomised controlled trial. BMJ Open 2020;10(11):e040623]. The final protocol, statistical analysis plan and health economic analysis plan are publicly available. Participants People were eligible to be included in the trial if they were adults (≥ 18 years) with a first-time TASD confirmed radiologically. People were excluded if they had neurovascular complications or bilateral dislocations, were unable to adhere to trial procedures or unable to attend physiotherapy within 6 weeks of injury, or had been previously included in the trial. After potential participants were assessed, informed written consent was obtained by a site-based researcher trained in good clinical practice. Intervention All participating centres received an initial training session from an Acute Rehabilitation following Traumatic anterior shoulder dISlocAtioN (ARTISAN) trial research physiotherapist. Following this, a lead physiotherapist at each site was identified to complete subsequent training of additional physiotherapists. This training was supported with web-based materials and a trial intervention manual. A quality control programme ensured intervention fidelity. Fidelity was monitored by: (a) direct observations by a member of the trial team; (b) audio recordings, used to assess the success or failure of the therapist to introduce the aims/rationale of each component and consolidate participant learning at the end of each component; and (c) a therapist self-report form completed for every trial participant. Points (a) and (b) were evaluated twice annually for the duration of recruitment and intervention delivery. Any issues identified were discussed on a case-by-case basis by the trial management group, who were responsible for recommending appropriate action. If issues with individual sites were not resolved following the recommendations, they were escalated to the trial steering committee. All participants had an initial period where the injured arm was supported in a sling, and then received an appointment for a physiotherapy advice session within 6 weeks of their injury. At the first appointment, all participants received the same initial shoulder examination followed by advice to aid self-management, lasting up to 1 hour and administered by an ARTISAN-trained physiotherapist. This included core components on education, progressive exercises, and exercise planning to enhance self-management behaviours. These core components were available after the advice session via a password-protected website or via paper-based alternatives at the participants’ preference. Details of the intervention development were first published in December 2021 [Liew Z, Mazuquin B, Ellard DR, Karasouli E, Drew S, Modi C, et al. Development of a single-session physiotherapy and self-management intervention for the treatment of primary traumatic anterior shoulder dislocation for the ‘Acute Rehabilitation following Traumatic anterior shoulder dISlocAtioN (ARTISAN)’ multicentre RCT. Physiotherapy 2021;113:80–7]. Following completion of the advice appointment, the participant was randomised, allocating them to this advice session alone or to this advice session plus the offer of additional physiotherapy. We defined the offer of additional physiotherapy to be the intervention. Participants randomised to advice only were provided with a contact point to self-refer back to the clinical team if recovery did not occur. Participants who self-referred back to the clinical team were considered to be per protocol. Participants randomised to receive additional physiotherapy were offered additional physiotherapy sessions. Each additional session lasted for up to 30 minutes, over a maximum duration of 4 months from the date of randomisation. The course of physiotherapy involved teaching and supervising the ‘core set’ of progressive exercises offered to the control arm in addition to being able to tailor treatment according to usual practice. Outcome measures Primary outcome measure The primary outcome measure was the OSIS. The OSIS is a self-completed outcome measure containing 12 questions (0–4 points each), with possible scores from 0 (worst function) to 48 (best function) [Dawson J, Fitzpatrick R, Carr A. The assessment of shoulder instability. The development and validation of a questionnaire. J Bone Joint Surg Br 1999;81(3):420–6; Dawson J, Rogers K, Fitzpatrick R, Carr A. The Oxford shoulder score revisited. Arch Orthop Trauma Surg 2009;129(1):119–23]. These questions relate to activities of daily living particularly relevant to patients exhibiting shoulder instability. Secondary outcome measures The secondary outcome measures were as follows. QuickDASH: The QuickDASH is a self-completed shortened version of the Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire. Instead of 30 items, the QuickDASH uses 11 items to measure physical function and symptoms in people with any or multiple musculoskeletal disorders of the upper limb. The questionnaire was designed to help describe the disability experienced by people with upper-limb disorders and also to monitor changes in symptoms and function over time [Gummesson C, Ward MM, Atroshi I. The shortened Disabilities of the Arm, Shoulder and Hand questionnaire (QuickDASH): validity and reliability based on responses within the full-length DASH. BMC Musculoskelet Disord 2006;7:44]. EuroQol-5 Dimensions, five-level version (EQ-5D-5L): EQ-5D-5L is a well-validated, generic health-related quality of life measure consisting of five dimensions, each with five levels of response. Each combination of answers can be converted into a health utility score. It has good test–retest reliability, is simple for participants to use, and gives a single preference-based index value for health status that can be used for broader cost-effectiveness comparative purposes [Herdman M, Gudex C, Lloyd A, Janssen M, Kind P, Parkin D, et al. Development and preliminary testing of the new five-level version of EQ-5D (EQ-5D-5L). Qual Life Res 2011;20(10):1727–36]. Complications: Serious adverse events (SAEs) were reported through the following mechanisms: (a) participant reported during routine collection of follow-up data; (b) local research teams reported any additional investigations or treatment of participants; (c) local physiotherapists delivering the trial interventions reported any events occurring during treatment sessions; and (d) medical records of non-responding participants were retrieved by local research teams at site. Serious adverse events not related to the intervention or TASD event were recorded on the SAE form but were not formally analysed or reported. SAEs that were predefined complications directly related to the trial interventions or directly caused by the primary TASD event were recorded as complications and were formally analysed and reported. Resource use questionnaires: The primary health economic analysis concentrated on direct intervention and healthcare/personal social services costs, while wider impact (societal) costs were included within the sensitivity analyses. Participants completed resource use questionnaires at all follow-up points to collect resource use data associated with the interventions under examination. We used techniques common in long-term studies to ensure minimum loss to follow-up, such as collection of multiple contact addresses and telephone numbers, mobile telephone numbers and e-mail addresses. All outcome measures were collected at baseline, 6 weeks, and 3, 6 and 12 months following randomisation. Qualitative interviews: One of the secondary objectives for ARTISAN was to qualitatively explore the participant experiences of receiving the trial treatments and facilitators and obstacles to adhering to them. Soon after the return of the 12-month follow-up questionnaire, a purposive sample (informed by treatment allocation, gender, age and outcome) of up to 50 participants were invited for one-off face-to-face interviews [by telephone or via Microsoft Teams® (Microsoft Corporation, Redmond, WA, USA)]. The aim was to explore the participant experience of receiving the trial treatments, and facilitators and obstacles to adhering to them. Results Between 14 November 2018 and 14 March 2022 we recruited from 41 NHS Trusts, who screened 1551 adults with a traumatic shoulder dislocation, from whom 1069 were not randomised. Forty of the 41 NHS Trust teams randomised the remaining 482 to advice only (n = 240) or advice and a programme of physiotherapy (n = 242). Ten participants withdrew prior to the primary outcome point of 6 months; 354 participants completed the primary outcome OSIS (73%) and were included in the final analysis. Across the groups there were high levels of adherence. Ninety-six physiotherapists delivered the interventions across the 41 sites. Two participants in the advice-only group (n = 240) crossed over to receive a programme of physiotherapy because in the opinion of the treating clinician a programme of further physiotherapy was needed. A further 42 participants self-referred to receive a programme of physiotherapy. A total of 194 participants received advice only, and there were missing data on two participants. In the group randomised to advice and further physiotherapy, 24 participants did not attend any additional appointments, 30 participants did not attend after one appointment, 167 had a complete programme of physiotherapy and 18 were receiving ongoing management after the 4-month period. There were three participants with missing data. There was no evidence of a statistically significant difference in OSIS between advice only and advice plus a programme of physiotherapy in the 6-month primary outcome, for the primary intention-to-treat adjusted analysis [favours physiotherapy: 1.5, 95% confidence interval (CI) −0.30 to 3.5] or at earlier 3-month and 6-week time points. At each time point the direction of change favoured a programme of physiotherapy; however, the 95% CI at each time point excluded our target four-point difference on the OSIS. There were no statistically significant differences in the QuickDASH or consistent differences in the EQ-5D-5L secondary outcomes. Secondary unadjusted and per-protocol analyses, and a sensitivity analysis accounting for missingness, were not materially different. Predefined subgroup analyses were undertaken to assess whether there was evidence that the intervention effect differed between age group (≤ 39 years old and ≥ 40 years old) and arm dominance. Our predefined subgroup analyses showed no evidence of clinically relevant effects from either age or arm dominance. Predefined complications profiles were similar across the two groups. In the advice group, there were reports of 7 shoulder re-dislocations, 3 frozen shoulders, 8 compression fractures of the shoulder, 22 rotator cuff tears and 1 report of nerve damage. In the additional physiotherapy group, there were 3 shoulder re-dislocations, 7 frozen shoulders, 21 rotator cuff tears and 4 compression fractures of the shoulder. Participants randomised to a programme of physiotherapy had non-significant increase in quality of life of 0.019 quality-adjusted life-years (QALYs) (95% CI −0.0005 to 0.0375) at a small, non-significant increased cost of £64 (95% CI −61 to 191) over the follow-up period. The probability of being cost-effective at a willingness-to-pay threshold of £30,000 was 0.946. Sensitivity analyses, including complete cases only and including broader societal costs, provided similar findings. Thirty-one participants were interviewed from both arms of the trial: ARTISAN [n = 16, 8 male and 8 female, mean age 49 years (standard deviation 21 years)] and ARTISAN Plus [n = 15, 11 male and 4 female, mean age 59 years (standard deviation 17 years)]. Four interlinked themes emerged from the data: (1) feelings about their shoulder rehabilitation outcome; (2) judgement of ARTISAN rehabilitation materials; (3) assessment of shoulder rehabilitation services provision; and (4) experiences of involvement in ARTISAN. The data reveal that generally across both arms of the trial, participants’ experiences were good. There are a number of areas where there are differences related to age and participants’ requirements to return to sporting activities. In terms of recovery following their rehabilitation journey, there is a trend towards a more positive outcome reported by those in the ARTISAN Plus arm of the trial. Conclusions We found little difference in the primary outcome (OSIS) or other secondary outcomes. Advice with additional physiotherapy sessions is cost-effective at a £30,000/QALY threshold. However, the small imprecise health gains raise questions on whether it is the best use of scarce physiotherapy resources given current service demands. The ARTISAN trial is the largest RCT for the common shoulder dislocation. The study recruited 482 participants, across 41 NHS Trusts and using 96 ARTISAN-trained physiotherapists, making the sample representative of NHS patients. Adherence to trial groups was high, with 99% in the advice group being offered advice only and 100% in the additional physiotherapy group being offered additional physiotherapy. The advice-only intervention was delivered by physiotherapists and crucially did not prohibit patients from self-referring back to the service if recovery did not meet their expectations. With this mechanism in place, 18% (42/240) self-referred back to the service. Empowering people to make their own treatment decisions was acceptable to clinicians (99% adherence) and allows flexibility for patients to decide when additional supervised treatment is required. It is acknowledged that there will be circumstances where additional supervised physiotherapy is appropriate; however, as a default referral pathway, it is not clinically superior to an advice-only intervention. The ARTISAN trial found evidence that there is little difference between referring people to a programme of physiotherapy or to a single session of advice with a physiotherapist. However, people who are not experiencing recovery as expected could self-refer for a supervised programme of physiotherapy. This will provide a balance between best use of NHS resources, empowering patients, and reducing unnecessary appointments for those who can self-manage. Further research should be directed towards optimising self-management strategies. Study registration This study is registered as ISRCTN63184243. Funding This award was funded by the National Institute for Health and Care Research (NIHR) Health Technology Assessment programme (NIHR award ref: 16/167/56) and is published in full in Health Technology Assessment; Vol. 28, No. 22. See the NIHR Funding and Awards website for further award information.

Introduction First-time traumatic anterior shoulder dislocation (TASD) is predominantly managed non-operatively. People sustaining TASD have ongoing pain, disability and future risk of redislocation. There are no published randomised controlled trials (RCTs) comparing different non-operative rehabilitation strategies to ascertain the optimum clinically effective approach after TASD.Methods and analysis In this multicentre adaptive RCT, with internal pilot, adults with a radiologically confirmed first time TASD treated non-surgically will be screened at a minimum of 30 sites. People with neurovascular complications, bilateral dislocations or are unable to attend physiotherapy will be excluded.Randomisation will be on a 1:1 treatment allocation, stratified by age, hand dominance and site. Participants will receive a single session of advice; or a single session of advice plus offer of further physiotherapy (maximum 4 months). The primary analysis will be the difference in Oxford Shoulder Instability Score at 6 months. A sample size of a minimum of 478 participants will allow us to show a four point difference with 90% power.An embedded qualitative study will explore the participants’ experiences of the trial interventions.Ethics, registration and dissemination Funded by NIHR HTA (16/167/56), 1 June 2018; National Research Ethic Committee approved (18/WA/0236), 26 July 2018. First site opened 5 November 2018 and final results will be updated on trial registries and submitted to a peer-reviewed journal and will inform rehabilitation strategies after a TASD. Study Within A Trial (SWAT) funded by MRC (MR/R013748/1), 1 May 2019; registered on the MRC-HTMR All-Ireland Hub (reference number SWAT 121).Trial registration number ISRCTN63184243. (Trial stage: Pre-results)

Introduction Shoulder pain due to irreparable rotator cuff tears can cause substantial disability, but treatment options are limited. A balloon spacer is a relatively simple addition to a standard arthroscopic debridement procedure, but it is costly and there is no current randomised trial evidence to support its use. This trial will evaluate the clinical and cost-effectiveness of a subacromial balloon spacer for individuals undergoing arthroscopic debridement for irreparable rotator cuff tears.New surgical procedures can provide substantial benefit to patients. Good quality randomised controlled trials (RCTs) are needed, but trials in surgery are typically long and expensive, exposing patients to risk and the healthcare system to substantial costs. One way to improve the efficiency of trials is with an adaptive sample size. Such methods are well established in drug trials but have rarely, if ever, been used in surgical trials.Methods and analysis Subacromial spacer for Tears Affecting Rotator cuff Tendons: a Randomised, Efficient, Adaptive Clinical Trial in Surgery (START:REACTS) is a participant and assessor blinded, adaptive, multicentre RCT comparing arthroscopic debridement with the InSpace balloon (Stryker, USA) to arthroscopic debridement alone for people with a symptomatic irreparable rotator cuff tear. It uses a group sequential adaptive design where interim analyses are performed using all of the 3, 6 and 12-month data that are available at each time point. A maximum of 221 participants will be randomised (1:1 ratio), this will provide 90% power (at the 5% level) for a 6 point difference in the primary outcome; the Oxford Shoulder Score at 12 months. A substudy will use deltoid-active MRI scans in 56 participants to assess the function of the balloon. Analysis will be on an intention-to-treat basis and reported according to principles established in the Consolidated Standards of Reporting Trials statement.Ethics and dissemination NRES number 18/WM/0025. The results will be disseminated via peer-reviewed publications, presentations at conferences, lay summaries and social media.Trial registration number ISRCTN17825590

We report on the final two days of a multiwavelength campaign of Sgr A* observing in the radio, submillimeter, infrared (IR), and X-ray bands in 2019 July. Sgr A* was remarkably active, showing multiple flaring events across the electromagnetic spectrum. We detect a transient ∼35 minute periodicity feature in Spitzer light curves on 2019 July 21. Time-delayed emission was detected in Atacama Large Millimeter/submillimeter Array light curves, suggesting a hotspot within the accretion flow on a stable orbit. On the same night, we observe a decreased flux in the submillimeter light curve following an X-ray flare detected by Chandra , and we model the feature with an adiabatically expanding synchrotron hotspot occulting the accretion flow. The event is produced by a plasma 0.55 R _S in radius with an electron spectrum p = 2.84. It is threaded by a ∼130 Gauss magnetic field and expands at 0.6% the speed of light. Finally, we reveal an unambiguous flare in the IR, submillimeter, and radio, demonstrating that the variable emission is intrinsically linked. We jointly fit the radio and submillimeter light curves using an adiabatically expanding synchrotron hotspot and find it is produced by a plasma with an electron spectrum p = 0.59, 187 Gauss magnetic field, and radius 0.47 R _S that expands at 0.029 c . In both cases, the uncertainty in the appropriate lower and upper electron energy bounds may inflate the derived equipartition field strengths by a factor of 2 or more. Our results confirm that both synchrotron- and adiabatic-cooling processes are involved in the variable emission’s evolution at submillimeter and IR wavelengths.