Frozen shoulder: living with uncertainty and being in "no-man's land"

The health economic analysis of surgery versus rehabilitation in non-traumatic musculoskeletal shoulder disorders: A systematic review of trial-based studies

OBJECTIVE

Non-traumatic musculoskeletal shoulder disorders are common. Their treatment, surgical or non-surgical, is associated with a considerable financial burden to health systems. The aim of this study was therefore to investigate the cost-effectiveness of surgical or rehabilitative treatments in this population.

DATA SOURCES

PubMed, Embase, NHS Economic Evaluation Database, Cost-Effectiveness Analysis registry, PEDro Database, Cochrane Library, and Google Scholar.

REVIEW METHODS

Trial-based economic evaluations assessing nonoperative and/or operative interventions for the management of non-traumatic shoulder disorders, published from January 2000 to October 2024, were searched. The selection process, data extraction and quality assessment (carried out with the Quality of Health Economic Studies instrument) were independently conducted by two reviewers.

RESULTS

Four studies (883 patients) were included in the review. Subacromial decompression for rotator cuff-related shoulder pain was found not to be cost-effective when compared with physiotherapy. Although it was not as cost-effective, Physiotherapy could be a socially beneficial alternative to mobilisation under anaesthesia in the early management of a frozen shoulder, due to lower costs and the delays in accessing surgical management in the pain-predominant phase. Productivity loss was the main driver of costs. It was not possible to determine the cost-effectiveness of other shoulder-related disorders due to sparsity of evidence.

CONCLUSION

Priority should be given to interventions that reduce productivity loss and facilitate patients' return to work as soon as possible. There is a definite need for multiplication and standardization of high-quality economic studies (and the trials they are based on) regarding the management of non-traumatic musculoskeletal shoulder disorders.

Impact of immune cells on the risk of frozen shoulder: A 2-sample Mendelian randomization study

The pathogenesis of frozen shoulder (FS) remains unclear, and current research primarily focuses on immune responses. Increasing evidence suggests that immune cells play a significant role in FS development. However, the causal relationship between the two remains poorly understood. Therefore, we aimed to investigate this using Mendelian randomization (MR) analysis. Single nucleotide polymorphisms closely associated with 731 immune phenotypes were obtained from publicly available GWAS datasets as instrumental variables. FS was used as the outcome with a sample size of 451,099 cases. Causal effects were analyzed using the inverse variance-weighted method. We conducted sensitivity tests, including the intercept of the MR-Egger and MR-PRESSO analyses. The presence of heterogeneity was evaluated using Cochran Q test. We identified potential causal relationships in terms of increased risk for FS with 5 immune phenotypes: CD25++ CD45RA+ CD4 not regulatory T cell %CD4+ T cells (odds ratio [OR] = 1.0273, 95% confidence interval [CI]: 1.0093-1.0457, P = .0028), CD25++ CD45RA+ CD4 not regulatory T cell %T cell (OR = 1.0240, 95% CI: 1.0057-1.0427, P = .0098), CD127 on CD28+ CD4+ T cells (OR = 1.0398, 95% CI: 1.0121-1.0682, P = .0046), CD4 on human leukocyte antigen DR+ CD4+ T cells (OR = 1.0795, 95% CI: 1.0316-1.2195, P = .0009), and human leukocyte antigen DR on CD14- CD16+ monocytes (OR = 1.0533, 95% CI: 1.0136-1.0945, P = .0081). Few significant heterogeneities or horizontal pleiotropies were observed. Through MR analysis, we identified distinct 5 types of immune cells that were positively correlated with the occurrence and development of FS, providing guidance for clinical intervention in FS.

Frozen shoulder: subjects' needs and perspectives and clinicians' beliefs and management strategies: do they align? A cross-sectional study

OBJECTIVE

Physiotherapists (PTs) play a crucial role in managing individuals with Frozen Shoulder (FS), frequently being the first healthcare professionals involved in the treatment of this condition.

AIM

This study aimed to compare the beliefs, expectations, and perspectives of individuals with FS with the knowledge, skills, and strategies of PTs, highlighting similarities and differences.

METHOD

This study adhered to the Checklist for Reporting Results of Internet E-Surveys (CHERRIES). From May 1st to August 1st, 2023, a two-part survey was conducted involving PTs and individuals diagnosed with FS. The survey focused on comparing key areas such as clinical assessment, patient education, treatment expectations, and the psychological aspects of the patient-clinician relationship.

RESULTS

A total of 501 PTs and 110 subjects with FS participated in the survey. Most PTs showed proficiency in FS pathoanatomical conditions and were also attentive to psychological aspects (88.4%), describing the pathology evolution in three or two stages (68.2%). They also highlighted the importance of patient education (89.6%) and recognized the potential benefits of a multiprofessional collaboration in managing FS (82.2%). Reassurance was reported as a priority by 32.3% of PTs. Subjects with FS expressed a preference for PTs who are both expert and empathetic (73.6%). Regarding their understanding of FS, 29.09% of subjects reported receiving a three-phase explanation, while 26.36% felt inadequately informed. Nearly half of the subjects (49.09%) anticipated being managed independently by a PT, with 93.64% prioritizing the improvement of their range of motion.

CONCLUSION

This study revealed a general agreement between subjects with FS and PTs regarding aspects of the therapeutic relationship, patient education, pathology management, compliance and motivation strategies, and pain management preferences. However, significant differences emerged concerning the perception of physiotherapy effectiveness, primary treatment goals, subjects' priorities, and the importance of psychological assessment.

Rehabilitation in subjects with frozen shoulder: a survey of current (2023) clinical practice of Italian physiotherapists

OBJECTIVE

Frozen Shoulder (FS) is a musculoskeletal pathology that leads to disability, functional decline, and a worsening in quality of life. Physiotherapists are the primary professionals involved in the treatment of FS, and it is essential to determine if their practice aligns with evidence-based suggestions.

AIM

The aim is to assess the knowledge, skills, and operational strategies of Italian physiotherapists regarding FS and compare them with the existing literature.

METHODS

A web-based, anonymous, and voluntary cross-sectional survey was developed and administered to Italian physiotherapists to evaluate their clinical practices.

RESULTS

A total of 501 physiotherapists (38.5% female), completed the survey. More than half were under 35 years old (67.8%), declared working in private practice settings or being self-employed (57.1%), and were primarily engaged with musculoskeletal patients (81.8%). For subjects with FS at their first access, 21.4% identified X-rays as the most useful imaging technique to recognize pathologies beyond rehabilitation competence. In terms of general management, the majority reported working with an orthopaedic or physiatrist (47.5%) or in a multidisciplinary team (33.5%). Regarding manual therapy techniques, 63.3% of physiotherapists preferred intense degree mobilization, posterior direction, and moderate pain at the end of the range of motion for low irritable/high stiffness FS; however, there is a lack of consensus for managing very irritable/low stiffness FS. The majority of physiotherapists (57.7%) concurred that stretching improves the balance between metalloproteinase and its inhibitors. Additionally, 48.3% of physiotherapists selected mobile phone videos and messages to improve patients' compliance with exercises at home and for motivational/educational purposes.

DISCUSSION AND CONCLUSION

The clinical practices of Italian physiotherapists in FS subjects sometimes deviate from evidence-based recommendations. While some discrepancies may be attributed to the existing uncertainties in the literature regarding knowledge and management strategies for FS patients, the authors recommend a stronger adherence to evidence-based practice.

Patient experiences of hydrodistension as a treatment for frozen shoulder: A longitudinal qualitative study

BACKGROUND

Frozen shoulder is a condition associated with severe shoulder pain and loss of function impacting on a persons' physical and mental health. Hydrodistension treatment that has been widely adopted within the UK National Health Service for the condition. However, evidence of clinical effectiveness and understanding of the patient experiences of this treatment are lacking. This study explored the experiences of people with a frozen shoulder who received hydrodistension treatment.

METHODS

A qualitative design with repeat semi-structured interviews was used to explore participants' experiences of hydrodistension treatment. Participants were interviewed 2-4 weeks and again at 8-10 weeks after treatment. Interviews were audio-recorded and transcribed verbatim. Findings were analysed using an inductive thematic analysis framework. The study is reported in accordance with the consolidated criteria for reporting qualitative (COREQ) research.

RESULTS

15 participants were interviewed online or over the phone. Three themes were identified: 'Preparing for and having a hydrodistension', 'Physiotherapy after hydrodistension', and 'Outcome of hydrodistension '. Participants believed hydrodistension would benefit them, was well tolerated by many, and the effects were apparent to most within the first week. Physiotherapy still seemed to be valued to support recovery beyond this timepoint, despite these early effects. Some participant's experienced harms including severe procedural pain and blood sugar dysregulation.

CONCLUSION

This is the first study to investigate the experiences of people who undergo hydrodistension for frozen shoulder. Hydrodistension appears an acceptable treatment to participants with a frozen shoulder, acceptability is enhanced through adequate shared decision making. Further high-quality research is required to understand the comparative effectiveness of hydrodistension as a treatment for frozen shoulder, including adverse events, and the benefit of treatment by a physiotherapist after hydrodistension.

Psychometric properties of the Disability of Arm Shoulder and Hand (DASH) in subjects with frozen shoulder: a reliability and validity study

BACKGROUND

Frozen Shoulder (FS) is a painful condition characterized by severe pain and progressive restriction of shoulder movement, leading to functional impairment and reduced quality of life. While different Patient Reported Outcome Measurements (PROMs) tools exist for assessing shoulder diseases, few specific PROMs are validated for FS patients.

PURPOSE

This study aims to assess the psychometric properties of the Disability of Arm, Shoulder, and Hand (DASH) questionnaire in FS patients.

METHODS

One hundred and twenty-four subjects (mean ± SD age = 55.4 ± 7.9 years; 55.6% female) diagnosed with FS were included and completed the DASH questionnaire, the Numerical Pain Rating Scale (NPRS), the Shoulder Pain and Disability Index (SPADI), and the Short-Form Health Survey 36 (SF-36). Floor or ceiling effects were investigated. Structural validity was analysed through a unidimensional Confirmatory Factor Analysis (CFA), internal consistency through Cronbach's alpha, test-retest reliability through the Intraclass Correlation coefficient (ICC), measurement error through the Standard Error of Measurement (SEM), and the Minimum Detectable Change (MDC), and construct validity through the hypothesis testing with the correlation with the other outcome measures used.

RESULTS

No floor or ceiling effects were observed. CFA confirmed a one-factor structure after addressing local item dependency (Root Mean Square Error of Approximation = 0.055; Standardized Root Mean Square Residual = 0.077; Comparative Fit Index = 0.970; Tucker-Lewis Index = 0.968). Cronbach's alpha was high (= 0.951), and test-retest reliability was excellent (ICC = 0.999; 95% CI: 0.998-1.000). SEM was equal to 0.5 points, and MDC to 1.5 points. Construct validity was considered satisfactory as 80% of the a-priori hypotheses were met.

CONCLUSION

The DASH questionnaire demonstrated good psychometric properties in FS patients, supporting its use as a valuable tool for assessing the impact of FS in clinical and research settings.

Proteomics and phosphoproteomics to study Tuina reverses capsule fibrosis in frozen shoulder: a research report based on rats

Frozen shoulder (FS) is a common disorder often treated with Tuina, but the mechanisms involved remain unclear. We employed proteomics and phosphoproteomics to investigate the mechanisms associated with the treatment of capsule fibrosis in FS rats. We used a method composed of three weeks of cast immobilization to establish a model of FS. We then administered Tuina once daily for 14 days, evaluated glenohumeral range of motion (ROM), assessed histological changes, and identified differentially expressed proteins (DEPs) using proteomics and phosphoproteomics. This study demonstrated that Tuina could improve glenohumeral ROM and reserve capsule fibrosis in FS rats. Proteomics revealed proteins regulated by Tuina belonging to the PI3K-AKT and ECM receptor interaction signaling pathways. Phosphoproteomics detected differentially phosphorylated proteins regulated by Tuina to be enriched in the MAPK signaling pathway. The combination of proteomics and phosphoproteomics for Protein-Protein Interaction (PPI) network analysis revealed that the phosphorylation of Myh3 and Srsf1 with a node degree larger than the average degree were considered the central regulatory protein modulated by Tuina to reverse capsule fibrosis. Thbs1, Vtn, and Tenascin-W were significantly enriched in PI3K-AKT and ECM receptor interaction signaling pathways and highly expressed in model rats. Tuina resulted in reduced expression of these proteins. Our findings demonstrated some of mechanisms behind the reversal of FS capsule fibrosis following Tuina, a scientific medical therapy for FS patients.

Does the psychological profile of a patient with frozen shoulder predict future outcome? A systematic review

BACKGROUND AND PURPOSE

Frozen shoulder (FS) is defined as a condition characterised by functional restriction and daily and nightly pain. As in other shoulder pathologies, the manifestation of psychological factors is recognised in FS; however, from a psychological point of view, only few studies have reported its prognostic value. The aim of this systematic review is to investigate, in patients with FS, the prognostic value of psychological factors on pain, function, disability, health-related quality of life, return to work and time to recovery.

MATERIALS AND METHODS

This systematic review was reported following the Preferred Reporting Items for Systematic reviews and Meta-Analysis-PRISMA 2020 guideline. The authors followed the Cochrane Handbook for Systematic review of Intervention as methodological guidance. The Quality in Prognostic Studies-QUIPS tool was used to assess the risk of bias.

RESULTS

Pain-related fear and depression could be prognostic regarding patient-reported outcome measures assessing shoulder function, disability, and pain; instead, pain catastrophizing could have a prognostic value assessed by the disability of the arm shoulder and hand -DASH scale. Anxiety would appear to impact on disability and pain.

DISCUSSION AND CONCLUSIONS

As widely reported in numerous musculoskeletal conditions, also in FS psychological factors influence the physical dimension such as pain, disability and function. Therefore, clinicians should be encouraged to identify these factors through a comprehensive assessment of the bio-psychological profile of each individual with FS. Perhaps, patients with FS that show such psychological prognostic factors could benefit from a comprehensive and shared approach with other dedicated professionals.

Perspectives, perceptions, and expectations of subjects with frozen shoulder: a web-based Italian survey

Introduction

Frozen shoulder (FS) is a musculoskeletal disorder affecting the glenohumeral joint. This condition leads to disability and a worsening in quality of life. Despite its considerable impact on patients and its economic burden, research on the psychological and social implications of FS-as well as patients' perspectives and needs-is limited. This study aims to explore the perspectives, perceptions, and expectations of individuals suffering from FS, providing a comprehensive understanding of their experiences and needs.

Methods

A cross-sectional observational study was conducted following STROBE guidelines. A 59-question survey was administered to Italian individuals diagnosed with FS from April 1 to July 1, 2023.

Results

All 110 participants completed the survey. Most preferred an experienced and empathetic physiotherapist (73.64%) and relied primarily on physiotherapy (49.09%) for FS management. Additionally, 45.45% were open to a multidisciplinary approach. Subjects reported reducing night pain (71.82%) and achieving full range of motion (ROM) recovery (70.91%) as their top priorities. Participants reported a notable shift in their mood from "pre" to "post" FS, with many experiencing fear and catastrophizing thoughts and perceiving a lack of social support. Furthermore, 27.27% were open to cortisone use, while 25.45% considered electrophysical agents beneficial for managing the painful phase of FS.

Conclusion

These results underscore a strong preference for empathetic physiotherapists and the value of a multidisciplinary approach. Addressing night pain and restoring ROM are crucial priorities-emphasizing the need for tailored and shared decision-making. Additionally, these findings highlight the importance of addressing psychological well-being alongside physical symptoms.

The impact of introducing hydrodistension as a treatment for frozen shoulder in a primary care musculoskeletal service: A retrospective audit

INTRODUCTION

Hydrodistension, where a relatively high volume of local anaesthetic, corticosteroid, and sterile saline are injected into the shoulder joint, is a treatment of interest for frozen shoulder. In the UK National Health Service this is typically provided in the hospital setting. In 2017 we introduced hydrodistension into our physiotherapy led musculoskeletal service. This report describes the findings from our audit of onward referral for orthopaedic assessment following the introduction of hydrodistension to our frozen shoulder treatment pathway.

METHODS

A retrospective audit of data from 102 patients who followed our hydrodistension treatment pathway for frozen shoulder since 2017 was conducted. All 102 patients received at least one hydrodistension procedure performed by a physiotherapist. This involved injecting the glenohumeral joint with a combination of local anaesthetic, corticosteroid, and saline under ultrasound guidance with a total volume of 25-35 mls. This data was compared to the outcomes of 102 patients who presented with frozen shoulder prior to 2017 who did not receive hydrodistension.

RESULTS

Of 102 patients who received hydrodistension within the musculoskeletal service, six patients required onward referral to orthopaedics. Of the 102 patients who did not receive hydrodistension prior to 2017, 58 required onward referral to orthopaedics.

CONCLUSION

We report a reduction in onward referral to orthopaedics following the introduction of hydrodistension to our physiotherapist-led treatment pathway for patients with frozen shoulder. This preliminary data identifies the need to further evaluate the clinical and cost-effectiveness of hydrodistension performed by physiotherapists for patients with frozen shoulder.

Living with frozen shoulder. 'Here are the risks. I want the injection'. An interpretative phenomenological analysis

BACKGROUND

Frozen shoulder is a disabling condition characterised by severe pain and loss of shoulder movement and may affect up to 5% of the population. Qualitative research documents debilitating pain and how treatment to reduce pain is a priority for people diagnosed with frozen shoulder. Corticosteroid injections are a principal treatment to reduce the pain of frozen shoulder, however little is known about the patient experience.

OBJECTIVES

This study aims to address this gap in the knowledge by exploring the lived experience of people with frozen shoulder who have undergone an injection and to highlight other novel findings.

DESIGN

This is a qualitative study using interpretative phenomenological analysis. One-to-one, semi-structured interviews were conducted with seven people diagnosed with frozen shoulder who had received a corticosteroid injection as part of their management.

METHODOLOGY

A purposive sample of participants were interviewed via MSTeams™ due to Covid-19 restrictions. Data was collected through semi-structured interviews and analysed in accordance with interpretive phenomenological analysis methods.

RESULTS

Three group experiential themes were identified: the dilemma surrounding injections; the challenges of understanding the causes of frozen shoulder; the impact on self and others.

CONCLUSION

Participants conveyed a strong desire in seeking a corticosteroid injection whilst seemingly dismissing the risks. A novel concept was illuminated as frozen shoulder seemed inextricably linked with the ageing process, which negatively impacted body-image. The impact on others is driven by a sense of the unfamiliar nature of illness and it is incumbent on healthcare professionals to seek opportunities to explore the individual's beliefs.