Risk factors and predictive models for frozen shoulder.

This study aims to explore the risk factors associated with frozen shoulder (FS) and develop a predictive model for diagnosing FS, in order to facilitate early detection of the condition. A total of 103 patients diagnosed with FS and admitted to the Department of Joint Surgery at Suining Central Hospital between October 2021 and October 2023 were consecutively included in the study. Additionally, 309 individuals without shoulder joint diseases, matched for age and gender, who visited the department during the same time, were included as the control group.The complete recording of clinical data for all patients was followed by the utilization of statistical tests such as the Mann-Whitney U test, sample t test, and chi-square test to compare different groups. Additionally, multivariate binary logistic regression analysis was employed to identify risk factors associated with the occurrence of FS in patients, leading to the establishment of a prediction model and derivation of a simplified equation. The diagnostic effectiveness of individual indicators and prediction models was assessed through the use of receiver operating characteristic (ROC) curve analysis. In the sample of 103 individuals, 35 were identified as male and 68 as female, with an average age range of 40-70 years (mean age: 54.20 ± 6.82 years). The analysis conducted between different groups revealed that individuals with a low body mass index (BMI), in conjunction with other factors such as diabetes, cervical spondylosis, atherosclerosis, and hyperlipidemia, were more susceptible to developing FS. Logistic regression analysis further indicated that low BMI, diabetes, cervical spondylosis, and hyperlipidemia were significant risk factors for the occurrence of FS. These variables were subsequently incorporated into a predictive model, resulting in the creation of a simplified equation.The ROC curve demonstrated that the combined indicators in the predictive model exhibited superior diagnostic efficacy compared to single indicators, as evidenced by an area under the curve of 0.787, sensitivity of 62.1%, and specificity of 82.2%. Low BMI, diabetes, cervical spondylosis, and hyperlipidemia are significant risk factors associated with the occurrence of FS. Moreover, the utilization of a prediction model has demonstrated superior capability in forecasting the likelihood of FS compared to relying solely on individual indicators. This finding holds potential in offering valuable insights for the early diagnosis of FS.

Factors associated with frozen shoulder in adults: a retrospective study.

OBJECTIVE: This study aims to explore the risk factors associated with frozen shoulder patients and further analyze the relationship between gender and diabetes with frozen shoulder. METHOD: We have reviewed the data of 1205 frozen shoulder patients in China's Xinjiang region from 2018 to 2023. The collected information included patients' gender, occupation, place of origin, marital status, age, the season of disease onset, duration of illness, etiology, surgical history, hypertension, diabetes, respiratory diseases, knee joint disease, hyperlipidemia, cardiovascular diseases, cervical spondylosis, lumbar disc herniation, rheumatoid arthritis, hyperuricemia, sleep quality, smoking and alcohol consumption, and constipation. We have used multifactor logistic regression analysis to identify the risk factors for a frozen shoulder. RESULTS: Single-factor logistic regression analysis showed that the number of females, patients with diabetes, knee joint disease, constipation, and patients with poor sleep quality in the observation group are higher than in the control group (P < 0.05). There were no statistically significant differences between the two groups in terms of occupation, place of origin, marital status, age, season of disease onset, duration of illness, etiology, surgical history, hypertension, respiratory diseases, hyperlipidemia, cardiovascular diseases, cervical spondylosis, lumbar disc herniation, rheumatoid arthritis, hyperuricemia, smoking, and alcohol consumption history (P > 0.05). Multivariate analysis showed that the final model included four variables: gender, diabetes history, sleep, and constipation. Among them, the OR values of gender and diabetes history were more significant than 1, indicating that they were independent risk factors for frozen shoulder, while the OR values of sleep and constipation were less than 1, suggesting that they were negatively associated with the occurrence of frozen shoulder. CONCLUSION: The results of this study suggest that gender and diabetes are independent risk factors for frozen shoulder. Additionally, poor sleep quality and constipation also can be correlated with the occurrence of a frozen shoulder.

Association between timing of initiating supervised physical rehabilitation after rotator cuff repair and incidence of repeat repair and capsulitis: a population-based analysis.

BACKGROUND: There is limited consensus on the optimal time to initiate supervised physical rehabilitation after a rotator cuff repair (RCR). We examined whether timing of initiating supervised physical rehabilitation was associated with repeat RCR or development of adhesive capsulitis within 12 months postoperatively in an observational cohort of commercially insured adults. METHODS: This retrospective cohort study used the IBM MarketScan Commercial Claims and Encounters Database. We included adults aged 18-64 who underwent a unilateral outpatient RCR between 2017 and 2020 and initiated supervised physical rehabilitation 1-90 days postoperatively. Multivariable logistic regression models examined the adjusted association between time of initiating supervised physical rehabilitation (1-13, 14-27, 28-41, and 42-90 days postoperatively) and each of the primary outcomes: repeat RCR and capsulitis. In a sensitivity analysis, time to rehabilitation was alternatively categorized using a data-driven approach of quartiles (1-7, 8-16, 17-30, and 31-90 days postoperatively). We report adjusted odds ratios (OR). RESULTS: Among 33,841 patients (86.7% arthroscopic index RCR), the median time between index RCR and rehabilitation initiation was 16 days (interquartile range 7-30), with 39.9% initiating rehabilitation at 1-13 days. Additionally, 2.2% underwent repeat RCR within 12 months, and 12-month capsulitis was identified in 1.9% of patients. There were no significant associations between timing of initiating rehabilitation and 12-month repeat RCR (OR 0.85-0.93, P = .18-.49) or 12-month capsulitis (OR 0.83-0.94, P = .22-.63). Lack of associations between timing and outcomes was supported in sensitivity analyses. CONCLUSIONS: Timing of initiating rehabilitation was not significantly associated with adverse outcomes after RCR. The finding of no increased odds of repeat RCR or capsulitis with the earliest timing may support earlier initiation of rehabilitation to accelerate return to daily activities. Findings should be replicated in another dataset of similarly-aged patients.

The Risk of Shoulder Adhesive Capsulitis in Individuals with Prediabetes and Type 2 Diabetes Mellitus: A Longitudinal Nationwide Population-Based Study.

BACKGRUOUND: This study aimed to investigate the association between type 2 diabetes mellitus (T2DM) and shoulder adhesive capsulitis (AC) using a large-scale, nationwide, population-based cohort in the Republic of Korea. METHODS: A total of 3,471,745 subjects aged over 20 years who underwent a National Health Insurance Service medical checkup between 2009 and 2010 were included in this study, and followed from the date of their medical checkup to the end of 2018. Subjects were classified into the following four groups based on the presence of dysglycemia and history of diabetes medication: normal, prediabetes, newly diagnosed T2DM (new-T2DM), and T2DM (claim history for antidiabetic medication). The endpoint was new-onset AC during follow-up. The incidence rates (IRs) in 1,000 person-years and hazard ratios (HRs) of AC for each group were analyzed using Cox proportional hazard regression models. RESULTS: The IRs of AC were 9.453 (normal), 11.912 (prediabetes), 14.933 (new-T2DM), and 24.3761 (T2DM). The adjusted HRs of AC in the prediabetes, new-T2DM, and T2DM groups were 1.084 (95% confidence interval [CI], 1.075 to 1.094), 1.312 (95% CI, 1.287 to 1.337), and 1.473 (95% CI, 1.452 to 1.494) compared to the normal group, respectively. This secular trend of the HRs of AC according to T2DM status was statistically significant (P<0.0001). CONCLUSION: This large-scale, longitudinal, nationwide, population-based cohort study of 3,471,745 subjects confirmed that the risk of AC increases in prediabetic subjects and is associated with T2DM status.

Adhesive capsulitis of the shoulder is associated with an increased risk for Parkinson's disease: a population-based longitudinal follow-up study.

INTRODUCTION: Previous studies have suggested a positive association between adhesive capsulitis of the shoulder (ACS) and Parkinson's disease (PD), but longitudinal data were lacking. The present population-based longitudinal follow-up study therefore investigated the risk of developing PD in patients with ACS. METHODS: This study utilized data from Taiwan's Longitudinal Health Insurance Database 2005 (LHID 2005). We defined our ACS group as the 19,920 patients aged between 40 and 79 who had been diagnosed with ACS between 2002 and 2006. The non-ACS group consisted of an age- and sex-matched but otherwise random selection of 19,920 patients without a diagnosis of ACS. The Kaplan-Meier method was then used to examine inter-group differences in PD-free survival rates, and Cox proportional-hazard regression modeling was used to evaluate the impact of ACS on PD risk. RESULTS: During a median follow-up period of 105 months, 242 subjects in the ACS group and 208 subjects in the non-ACS group developed PD. The adjusted hazard ratio (HR) of 1.53 (1.26-1.86) indicated that ACS patients had a significantly higher risk of developing PD than their non-ACS counterparts, regardless of sex and age. Landmark analysis that excluded PD cases detected within the first 2 years after an ACS diagnosis showed that the HR was almost unchanged, at 1.56 (1.26-1.95). CONCLUSIONS: Patients with ACS are at a high risk of developing PD. KEY POINTS: • This population-based study showed that adhesive capsulitis of the shoulder (ACS) is associated with a higher risk of Parkinson's disease (PD). • This study broke new ground by using a longitudinal follow-up design and a nationally representative sample. • Our findings suggest that clinicians who care for ACS patients need to be aware of this increased risk of developing PD.

Is there an association between breast cancer and incident adhesive capsulitis of the shoulder? A retrospective cohort study from Germany.

PURPOSE: Preliminary data suggest that women with breast cancer are at particularly high risk of adhesive capsulitis of the shoulder. Therefore, this study aimed to investigate the potential association between breast cancer and adhesive capsulitis in adults from Germany. METHODS: This retrospective cohort study included all women aged ≥ 18 years who were diagnosed for the first time with breast cancer in one of 1,274 general practices in Germany between January 2000 and December 2018 (index date). Women without breast cancer were matched (1:1) to those with breast cancer using a propensity score based on age at the index date, index year, and the average number of medical consultations per year during the follow-up. In women without breast cancer, the index date was a randomly selected visit date between 2000 and 2018. The association between breast cancer and the 10-year incidence of adhesive capsulitis was studied using Kaplan-Meier curves and a Cox regression model adjusted for age and several comorbidities. RESULTS: There were 52,524 women included in this study (mean [SD] age 64.2 [12.9] years). The 10-year incidence of adhesive capsulitis was 3.6% in both the group with and the group without breast cancer (log-rank p-value = 0.317). The Cox regression analysis further showed no significant association between breast cancer and adhesive capsulitis (HR = 0.96, 95% CI = 0.86-1.08). CONCLUSION: In this sample of women from Germany, breast cancer was not significantly associated with adhesive capsulitis. Although the present preliminary findings are reassuring, general practitioners should regularly assess shoulder function in breast cancer survivors.

Shoulder capsulitis: What relation with diabetes mellitus in a moroccan population?

Introduction: Shoulder capsulitis (SC) is a common musculoskeletal complication in patients with diabetes. It can be particularly disabling. It is often overlooked by clinicians. The aim of this study is to evaluate the prevalence of retractile capsulitis and to identify the risk factors in a population of Moroccan diabetic patients. Materials and Methods: We realised a cross-sectional study including patients with diabetes mellitus (DM). We recorded the demographic and diabetic characteristics of our patients. SC and vascular complications were assessed by clinical and para-clinical investigations. The prevalence of SC was calculated. The factors associated with SC were evaluated by suitable statistical tests. Results: Three hundred and Sixty-five patients were included; 84.9% had Type 2 DM (T2DM). The mean age of the participants was 52.6 ± 13.6. Shoulder capsulitis was present in 12.6% of patients. In statistical analysis, age >50 years (P = 0.001), T2DM (P = 0.03), duration of progression >10 years (P = 0.03), dyslipidemia (P = 0.013) and macrovascular complications (P = 0.009) were associated with an increased frequency of SC. Conclusion: This study shows that the prevalence of SC is higher in diabetic patients. Therefore, inclusion of this pathology in the global management of the diabetic patient is necessary.

Résumé Introduction: la capsulite rétractile de l'épaule (CR) est une complication musculo-squelettique fréquente chez les patients diabétiques. Elle peut être particulièrement invalidante. Elle est souvent méconnue par les cliniciens. Cette étude a pour objectif d'évaluer la prévalence de la capsulite rétractile et d'identifier les facteurs de risque dans une population de patients diabétiques marocains. Methodes: Une étude transversale incluant des patients diabétiques. Nous avons enregistré les caractéristiques démographiques et les caractéristiques du diabète de nos patients. La CR et les complications vasculaires ont été évalués par des examens cliniques et para cliniques. La prévalence de la CR a été calculée, ensuite les facteurs associés à la CR ont été évalués par des tests statistiques adaptés. Resultat: 365 patients ont été inclus ; 84.9 % avaient un diabète de type 2. L'âge moyen des participants était de 52.6 ±13.6. Une capsulite de l'épaule était présente chez 12,6 % des patients. Dans l'analyse statistique, l'âge supérieur à 50 ans (P=0,001), le diabète de type 2 (P=0.03), la durée d'évolution >10 ans (P=0.03), la dyslipidémie (P=0.013) et les complications macro vasculaires (P=0.009) étaient associées à une fréquence accrue de la capsulite rétractile. Conclusion: cette étude montre que la prévalence de la CR est plus élevée chez les patients diabétiques. D'où la nécessité d'inclure cette pathologie dans la prise en charge globale du patient diabétique, et de la même manière, réaliser un dépistage de diabète chez les patients souffrant d'un capsulite rétractile. Mots clés: diabète sucré, complications musculo squelettiques, capsulite rétractile.

MRI findings in atraumatic shoulder pain-patterns of disease correlated with age and gender.

BACKGROUND: The rotator cuff is a group of muscles and tendons which support the shoulder joint. Rotator cuff disease is a frequent cause of morbidity in adulthood. AIMS: The aims of his study are to determine the prevalence and patterns of rotator cuff derangement in symptomatic patients using MRI and to attempt to correlate identified patterns of disease with age and gender METHODS: Five hundred ninety-seven patients attending for MRI of the shoulder with atraumatic shoulder pain were included for study. Patients' age and gender was recorded. Record was made of the presence or absence of rotator cuff derangement and of degenerative change in the AC and glenohumeral joints. Correlation was made between age and gender. RESULTS: There were 358 males (60%) and 239 females (40%) with a mean age of 49.4 ± 17.1 years. Subacromial bursitis was identified in 517 patients. A normal supraspinatus tendon was identified in 219 patients and supraspinatus full thickness tearing was identified in 102 patients. A normal AC joint was identified in 267 patients while degenerative AC joint changes were identified in 370 patients. A significant correlation was identified between age and rotator cuff derangement (p < .001) and between age and AC joint derangement (p < .001). No significant difference was identified between gender and patterns of cuff derangement CONCLUSION: The extent of rotator cuff and AC joint derangement increases with ageing. Impingement appears to trigger a cascade of events in sequence, from isolated subacromial bursitis through to supraspinatus tendon tearing. Patterns of rotator cuff derangement are similar in men and women.

Incidence of adhesive capsulitis of the shoulder during the beginning of the COVID-19 pandemic.

OBJECTIVE: Adhesive capsulitis is an inflammatory disease of the joint capsule, clinically manifested as pain, stiffness, and dysfunction of the shoulder. We subjectively observed an increased incidence of adhesive capsulitis, and raised the hypothesis that adhesive capsulitis was more frequent in magnetic resonance imaging examinations performed during the COVID-19 pandemic as compared with examinations prior to this period. METHODS: Data from medical records and magnetic resonance imaging of the shoulder presenting typical imaging findings of adhesive capsulitis, performed in our organization from March to June 2020, were evaluated and compared with data and imaging from the same period of the previous year. To this end, an organizational business intelligence tool called "search reports" was used, searching for the term "adhesive capsulitis" in the radiological report, results were tabulated, and corresponding magnetic resonance imaging exams were analyzed. RESULTS: Our search found a total of 240 and 1,373 cases of adhesive capsulitis in the 2020 and 2019 periods, respectively. The mean age of patients was 53.9 years in the 2020 group and 49.9 years in 2019 (p<0.001). Magnetic resonance imaging findings were positive for adhesive capsulitis in 40 out of 240 shoulders (16.7%) in the 2020 group versus 127 out of 1,373 shoulders (9.2%) in the 2019 group. This difference was statistically significant (p=0.001). CONCLUSION: Our study findings suggest a relative increase in the proportion of magnetic resonance imaging findings suggestive of adhesive capsulitis cases during COVID-19 pandemics based on data from our organization.

Association between adhesive capsulitis and depression: A five-year retrospective cohort study including 58,516 adults from Germany.

BACKGROUND: Little is known on the longitudinal relationship between adhesive capsulitis and depression. Therefore, the aim of this study was to investigate the association between adhesive capsulitis and the five-year cumulative incidence of depression in adults from Germany. METHODS: The present retrospective cohort study included all adults aged ≥18 years with a first diagnosis of adhesive capsulitis in one of 1198 general practices in Germany between January 2010 and December 2018 (index date). Patients with adhesive capsulitis were matched to those without adhesive capsulitis using a propensity score based on age, sex, index year, average number of visits per year, and diagnoses documented prior to or at the index date (i.e., thyroid gland disorders, diabetes mellitus, coronary heart disease, cerebrovascular diseases, and Parkinson's disease and secondary parkinsonism). In individuals without adhesive capsulitis, the index date was a randomly selected visit date. RESULTS: This study included 29,258 patients with and 29,258 patients without adhesive capsulitis (mean [SD] age 55.9 [15.6] years; 53.2% men). Within five years of the index date, there were 17.5% of patients with adhesive capsulitis and 8.7% of those without adhesive capsulitis diagnosed with incident depression (log-rank p-value<0.001). This result was corroborated in the Cox regression analysis, as there was a positive and significant association between adhesive capsulitis and the cumulative incidence of depression (HR = 1.86, 95% CI: 1.78-1.95). CONCLUSION: In this study, adhesive capsulitis was associated with an increased cumulative incidence of depression. Further research is warranted to better understand the mediating factors involved in this relationship.

Influence of diabetes on response to ultrasound guided hydrodistension treatment of adhesive capsulitis: a retrospective study.

BACKGROUND: Diabetes is associated with microvascular and macrovascular complications. Although it is less recognized, diabetes also has an important role in the development of musculoskeletal disorders. Our objective was to evaluate the effect of type 2 diabetes (T2D) on the severity of adhesive capsulitis of the shoulder (AC) and on the efficacy of ultrasound guided hydrodistension treatment. METHODS: We conducted a retrospective longitudinal observational study, of patients with AC who underwent ultrasound guided hydrodistension at our Centre. Severity was measured with DASH (Disabilities of Arm, Shoulder and Hand) score and pain was evaluated with a score between 0 and 10. The association of T2D with baseline characteristics of AC, and with outcomes at 6-12 months was analyzed using linear and logistic regression models. RESULTS: We evaluated 120 ultrasound guided hydrodistension treatments of AC, 85 in patients without diabetes and 35 in patients with T2D. Patients with diabetes had a higher prevalence of dyslipidemia, hypertension and higher HbA1c values. The average duration of diabetes was 4.8 years (2.0, 7.9). The baseline characteristics of AC were not significantly different between patients with and without diabetes. Patients with T2D relapsed more frequently and required more reinterventions than patients without diabetes (20.0% vs 4.7%, p = 0.008), had higher post-intervention pain scale values [4.0 (0.0-5.0) vs 0.0 (0.0-5.0), p = 0.022] and higher post-intervention DASH score [0.8 (0.0-1.8) vs 0.0 (0.0-0.8), p = 0.038]. CONCLUSION: Although baseline characteristics of AC in patients with diabetes were similar to those without diabetes, patients with diabetes had a worse response to treatment, more frequent relapses and a greater need for new interventions.

The prevalence of frozen shoulder in patients with limited Dupuytren disease.

Evidence from the literature suggests an association between Dupuytren disease and frozen shoulder syndrome, both clinically and histologically. An increased tendency for fibrotic healing after repetitive microtrauma could be an underlying mechanism. However, it remains unclear how strong this association is and if only mild signs of Dupuytren disease would also increase the risk of frozen shoulder. In 61 patients, we examined the hands for signs of Dupuytren disease and the shoulders for pain and limited motion. We found a 21,7% prevalence of frozen shoulder syndrome in patients with signs of Dupuytren disease versus 13,9% in those without. The other way around, in patients with frozen shoulder syndrome the prevalence of Dupuytren disease was 50% versus 36.7% in those without frozen shoulder syndrome. These differences were not statistically significant, contrary to similar research in the literature. However, methodological issues, especially the choice of control group, may explain the differences between our findings and previous studies. We conclude that the clinical association between Dupuytren disease may not be so strong as previously thought, especially in patients with only limited signs of the disease.

Serious adverse event rates and reoperation after arthroscopic shoulder surgery: population based cohort study.

OBJECTIVE: To provide clinicians and patients with accurate risk estimates of serious adverse events after common elective shoulder arthroscopic procedures, including reoperation within one year. DESIGN: Population based cohort study. SETTING: Hospital Episode Statistics for NHS England, including civil registration mortality data from the Office for National Statistics. PARTICIPANTS: 288 250 arthroscopic shoulder procedures performed in 261 248 patients aged ≥16 years between 1 April 2009 and 31 March 2017. Elective procedures were grouped into subacromial decompression, rotator cuff repair, acromioclavicular joint excision, glenohumeral stabilisation, and frozen shoulder release. MAIN OUTCOME MEASURES: The primary outcomes were rates of serious adverse events (mortality, pulmonary embolism, pneumonia, myocardial infarction, acute kidney injury, stroke, and urinary tract infection) requiring inpatient care within 90 days post-surgery. Secondary outcomes were specific adverse event rates at 90 days, and reoperations (including for deep infection) within one year. RESULTS: The overall rate of complications within 90 days after arthroscopic shoulder surgery (including reoperation) was low at 1.2% (95% confidence interval 1.2% to 1.3%), with one in 81 patients at risk, and varied according to type of procedure, from 0.6% (0.5% to 0.8%) for glenohumeral stabilisation to 1.7% (1.5% to 1.8%) for frozen shoulder release. After adjustment for age, comorbidities, and sex, no effect of procedure type was observed. Pneumonia was the most common adverse event (0.3%, 0.3% to 0.4%), with one in 303 patients at risk. Pulmonary embolic events were rare, at 0.1% (0.1% to 0.1%), with one in 1428 patients at risk. At one year, the overall rate for reoperation was 3.8% (3.8% to 3.9%), with one in 26 patients at risk, ranging from 2.7% (2.5% to 3.0%) for glenohumeral stabilisation to 5.7% (5.4% to 6.1%) for frozen shoulder release. The overall rate of further surgery for deep infection was low, at 0.1% (0.1% to 0.1%), with one in 1111 patients at risk, but was higher after rotator cuff repair (0.2%, 0.2% to 0.2%), with one in 526 patients at risk. Over the study period the number of arthroscopic shoulder procedures increased, except for subacromial decompression, which decreased. CONCLUSIONS: The findings of this study suggest that risks of serious adverse events associated with common shoulder arthroscopy procedures are low. Nevertheless, serious complications do occur, and include the risk of reoperation in one in 26 patients within one year. STUDY REGISTRATION: Clinical. TRIALS: gov NCT03573765.

Low prevalence of trochanteric bursitis in patients with refractory lateral hip pain.

INTRODUCTION: Bursitis at the greater trochanter has historically been identified as a major pain generator in patients with lateral hip pain (LHP). We believe that hip abductor tendon pathology (HATP) plays an important and overlooked role in LHP. The purpose of this study was to evaluate the presence of isolated trochanteric bursitis on MRI in patients with refractory LHP. METHODS: The MRIs of 120 patients with LHP (94% women, median age 54 years) performed at our orthopaedic outpatient clinic between 2017 and 2020 were evaluated by two raters for trochanter-related pathologies, including HATP and bursitis. RESULTS: Two (2%) patients were registered with greater trochanteric bursitis with no relevant HATP, 30 (25%) patients had elements of inflammation (high-intensity signals) in the greater trochanteric bursa with relevant HATP. Five (4%) patients had relevant HATP with bursitis in the sub-gluteus minimus bursa with no bursitis in the greater trochanteric bursa. The remaining 83 (69%) patients had no sign of trochanter-related bursitis. CONCLUSION: Isolated trochanteric bursitis as the cause of refractory LHP appears to be rare. We believe that the presence of HATP in LHP has been severely underestimated and a shift in focus towards treatment of these structures is necessary. FUNDING: none. TRIAL REGISTRATION: According to current national legislation, no formal ethical approval was required for this study. The National Data Protection Agency approved the study (1-16-02-124-19).

The Prevalence of Shoulder Disorders among Professional Bullfighters: A Cross-Sectional Ultrasonography Study.

We aimed to investigate clinical and ultrasound signs of shoulder overuse injuries in professional bullfighters; side-to-side differences (dominant vs. non-dominant); and to determine potential differences according to bullfighters' categories. An observational cross-sectional study was conducted. Thirty professional and active bullfighters were assessed. A bilateral ultrasound assessment of the subacromial bursa, long biceps head tendon (LHBT), and rotator cuff was performed to determine the presence of bursitis, subluxation, partial or total tendon rupture, tenosynovitis, or calcification. Supraspinatus tendon thickness was measured. Finally, a battery of clinical orthopedic tests (Yergason, Jobe, infraspinatus, Gerber, and bursa tests) were also performed. Most identified ultrasound findings were located in the dominant side, being the presence of bursitis (n = 9; 30%), LHBT tenosynovitis (n = 8; 26.7%), and subscapularis tendon calcification (n = 5; 16.7%) the most prevalent. No side-to-side or between-categories differences were found for supraspinatus tendon thickness (all, p > 0.05). The most frequent positive signs were the infraspinatus test (40.0%), Gerber lift-off test (33.3%), and bursitis, Jobe, and Yergason tests (all, 26.7%). Ultrasound signs were commonly found at LHBT, subacromial bursa, and rotator cuff in professional bullfighters without difference between categories and sides. No side-to-side or between-categories differences were found. Positive clinical test signs suggestive of bursitis, LHBT, and rotator cuff tendinopathy were frequently observed.

Factors related to initial treatment for adhesive capsulitis in the medicare population.

BACKGROUND: Primary adhesive capsulitis (AC) is not well understood, and controversy remains about the most effective treatment approaches. Even less is known about the treatment of AC in the Medicare population. We aimed to fully characterize initial treatment for AC in terms of initial treatment utilization, timing of initial treatments and treatment combinations. METHODS: Using United States Medicare claims from 2010-2012, we explored treatment utilization and patient characteristics associated with initial treatment for primary AC among 7,181 Medicare beneficiaries. Patients with primary AC were identified as patients seeking care for a new shoulder complaint in 2011, with the first visit related to shoulder referred to as the index date, an x-ray or MRI of the shoulder region, and two separate diagnoses of AC (ICD-9-CM codes: 726.00). The treatment period was defined as the 90 days immediately following the index shoulder visit. A multivariable logistic model was used to assess baseline patient factors associated with receiving surgery within the treatment period. RESULTS: Ninety percent of beneficiaries with primary AC received treatment within 90 days of their index shoulder visit. Physical therapy (PT) alone (41%) and injection combined with PT (34%) were the most common treatment approaches. Similar patient profiles emerged across treatment groups, with higher proportions of racial minorities, socioeconomically disadvantaged and more frail patients favoring injections or watchful waiting. Black beneficiaries (OR = 0.37, [0.16, 0.86]) and those residing in the northeast (OR = 0.36, [0.18, 0.69]) had significantly lower odds of receiving surgery in the treatment period. Conversely, younger beneficiaries aged 66-69 years (OR = 6.75, [2.12, 21.52]) and 70-75 years (OR = 5.37, [1.67, 17.17]) and beneficiaries with type 2 diabetes had significantly higher odds of receiving surgery (OR = 1.41, [1.03, 1.92]). CONCLUSIONS: Factors such as patient baseline health and socioeconomic characteristics appear to be important for physicians and Medicare beneficiaries making treatment decisions for primary AC.

Involvement of inflammatory lipoproteinemia with idiopathic adhesive capsulitis accompanying subclinical hypothyroidism.

BACKGROUND: Thyroid functional abnormalities are considered risk factors for idiopathic adhesive capsulitis (IAC) though that relationship remains uncertain. Although dyslipidemias are associated with IAC, no readily accessible study has reported associations between dyslipidemias and IAC patients with subclinical hypothyroidism. The purposes of this study were to investigate whether subclinical hypothyroidism is an independently associated factor for IAC and to determine the differences in prevalence of dyslipidemias between two groups of persons with subclinical hypothyroidism: one composed of IAC patients and the other of individuals without IAC. METHODS: This case-control study included a case group of 412 IAC patients without intrinsic shoulder lesions, extrinsic causes, or medication for thyroid dysfunction. The control group comprised 1236 age- and sex-matched persons seeking general checkups at the authors' health promotion center during the same period as the case group. Control subjects had normal shoulder function and no previously diagnosed adhesive capsulitis, no medication for thyroid dysfunction, and no history of trauma or of shoulder surgery. The studied variables were age, gender, obesity, diabetes, dyslipidemias, subclinical hypothyroidism, hypothyroidism, and hyperthyroidism. A conditional logistic regression analysis evaluated the matched sets of subjects to determine odds ratios and 95% confidence intervals for the studied variables. The differences in the prevalence of dyslipidemias between IAC patients with subclinical hypothyroidism and individuals with subclinical hypothyroidism but without IAC were determined with generalized estimating equations, using covariates of age, sex, and diabetes. The P values were set at < 0.05. RESULTS: Subclinical hypothyroidism (odds ratio, 2.10; 95% confidence interval, 1.36-3.15; P = .001) was significantly associated with IAC. Patients with IAC and subclinical hypothyroidism had a significantly higher prevalence of hyper-low-density lipoproteinemia, an inflammatory lipoproteinemia, than individuals with subclinical hypothyroidism but without IAC (P = .002). CONCLUSIONS: Subclinical hypothyroidism is significantly associated with IAC. Hyper-low-density lipoproteinemia, an inflammatory lipoproteinemia, is involved in IAC accompanied by subclinical hypothyroidism.

Persistent Shoulder Pain After Vaccine Administration Is Associated with Common Incidental Pathology: A Systematic Review.

BACKGROUND: Claims of shoulder injury now account for half of all claims to the Vaccine Injury Compensation Program. Reports from databases of claims or potential adverse events note a relatively high mean age and high prevalences of rotator cuff tendinopathy and adhesive capsulitis-common shoulder problems that might be incidental to vaccination. Published case reports provide much more detail about individual patients than is available in databases. A review of published cases provides an opportunity for more detailed review of symptoms, diagnoses, pathology, treatment, and prognosis. Such a review can better assess the relative likelihood that pathologies associated with new persistent shoulder symptoms after vaccination are coincidental or unique to and caused by vaccine. QUESTIONS/PURPOSES: Regarding published case reports addressing persistent shoulder pain after vaccination: (1) In what proportion of patients was a specific diagnosis made? (2) What diagnoses were most common? (3) Among patients treated nonsurgically, what proportion resolved, and over what time span did they resolve? METHODS: In August 2020, we searched PubMed and Embase between 2006 and 2020 using the following search strategy: Search 1: (shoulder dysfunction OR shoulder pain OR shoulder bursitis OR rotator cuff tendonitis OR adhesive capsulitis OR glenohumeral arthritis AND [vaccine OR vaccination OR immunization]); Search 2: (shoulder injury related to vaccine administration or SIRVA). The search was supplemented by reviewing reference lists of identified studies. Inclusion criteria were any detailed report of three or fewer cases involving shoulder pain after vaccine administration. Twenty published reports of 29 patients were identified and assessed by two reviewers independently. One reported glenohumeral joint infection was excluded because the relationship between this type of relatively uncommon, discrete diagnosis and vaccination raises different considerations. We assumed a high risk of bias, although we are not aware of bias assessment tool for case reports. We recorded and summarized patient demographics, symptoms, examination and imaging findings, surgery findings, diagnoses, treatments, and outcomes. Seventy-five percent (21 of 28) of patients were women, with a mean age of 54 ± 19 years. In search of an underlying pathology, at least one diagnostic study was performed in 82% (23 of 28) of patients including radiographs in seven, ultrasound in seven, and MRI in 16 patients (some patients underwent more than one type of imaging). We distinguished specific pathophysiological diagnosis from shoulder pain and stiffness, counted the most common diagnoses among patients a specific diagnosis, and tracked symptom resolution among patients treated nonoperatively. RESULTS: A specific diagnosis was made in 57% (16 of 28) of patients. Twelve patients had pain and limitation of motion due to pain but no specific pathological diagnosis. The most common specific diagnoses were rotator cuff tendinopathy (9 of 16) and adhesive capsulitis (4 of 16). Less common specific diagnoses included rotator cuff arthropathy (and rheumatoid arthritis) and suspected septic arthritis with nonspecific synovitis on arthroscopy. One patient had transient MRI signal change in the humeral head, which was interpreted as osteonecrosis that resolved in a manner not typical for that diagnosis. Of the 17 patients treated nonsurgically, 15 reported resolution, and two had incomplete symptom resolution with the mean 6-month evaluation period. CONCLUSION: The observation that persistent shoulder pain after vaccination overlaps with common shoulder pathology-both in large databases as well as in more detailed reports of specific patients as analyzed in this review-establishes a high probability of a coincidental rather than a causal association. In the absence of high-quality experimental evidence of vaccine-specific shoulder pathology, in our opinion, it seems safest and healthiest to assume that perceived shoulder injury related to vaccine administration (SIRVA) is due to misinterpretation of new symptoms from established pathology rather than a new, vaccine-specific pathology. LEVEL OF EVIDENCE: Level IV, therapeutic study.

Psychological risk factors for the occurrence of frozen shoulder after rotator cuff repair.

INTRODUCTION: Frozen shoulder is a dreaded complication after rotator cuff repair. HYPOTHESIS: There are psychological determinants for this complication. MATERIALS AND METHODS: We prospectively included 77 consecutive patients who underwent arthroscopic rotator cuff repair between May 2018 and April 2019. Along with a functional evaluation, we determined the Constant score, anxiety and depression levels based on the HADS, and kinesiophobia based on the Tampa Scale preoperatively and 6months after the surgery. RESULTS: At the 6-month follow-up, 8 patients had been diagnosed with frozen shoulder (group A), 65 patients had satisfactory joint range of motion (group B) and 4 were lost to follow-up. In the frozen shoulder group, the preoperative anxiety rate was significantly higher than in group B (50% versus 17%, p=0.04). Furthermore, there were significantly more women (p=0.028) and more patients with an occupational disease in group A (75% versus 18%, p=0.027). At 6months postoperative, the Constant score was 55 in the group with a frozen shoulder versus 72 in group B (p=0.004). Neither depression nor kinesiophobia were risk factors for the development of frozen shoulder after rotator cuff repair. CONCLUSION: Preoperative anxiety, the female sex and occupational disease are all risk factors for the occurrence of frozen shoulder after rotator cuff repair. Knowing these predisposing factors will help us better manage at-risk patients. LEVEL OF EVIDENCE: III, prospective study.

Prevalence of iliopsoas bursitis in patients with end-stage hip osteoarthritis.

OBJECTIVES: Iliopsoas bursitis (IB) is a relatively rare condition that is associated with hip diseases. It can cause neurological symptoms and swelling of the lower extremities by compressing the femoral nerve and vessels. The aim of this study is to examine the prevalence of IB in patients with end-stage hip osteoarthritis. METHODS: A total of 544 patients underwent total hip arthroplasty between May 2010 and May 2019. All patients were examined using computed tomography (CT) to perform preoperative planning. We reviewed the CT images and examined the prevalence and size of IB. These lesions were divided into three types based on their shape (round type, oval type, and heart-shaped type). RESULTS: Of the 544 patients, IB was found in 37 patients. We observed the round type in 4 patients, the oval type in 31 patients, and the heart-shaped type in 2 patients. Two patients showed severe swelling in the legs and had a blood circulatory disorder of the legs. Both cases were heart-shaped bursitis. CONCLUSION: Symptomatic IB was observed in two cases, both of which had a heart shape surrounding the iliopsoas tendon and femoral neurovascular bundle. Although symptomatic IB is a rare condition, special attention is required for heart-shaped IB.