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Objective: The aim of this study was to compare handrim wheelchair propulsion technique between individuals with spinal cord injury with and without shoulder pain. Design: A cross-sectional study including 38 experienced handrim wheelchair users with spinal cord injury was conducted. Participants were divided into the "shoulder pain" (n =15) and "no-shoulder pain" (n = 23) groups using the Local Musculoskeletal Discomfort scale. Kinetic and spatiotemporal aspects of handrim wheelchair propulsion during submaximal exercise on a motor-driven treadmill were analyzed. Data were collected using a measurement wheel instrumented with three-dimensional force sensors. Results: After correction for confounders (time since injury and body height), linear regression analyses showed that the pain group had a 0.30-sec (95% confidence interval, -0.5 to -0.1) shorter cycle time, 0.22-sec (95% confidence interval, -0.4 to -0.1) shorter recovery time, 15.6 degrees (95% confidence interval, -27.4 to -3.8) smaller contact angle, and 8% (95% confidence interval, -15 to 0) lower variability in work per push compared with the no-pain group. Other parameters did not differ between groups. Conclusions: This study indicates that individuals with spinal cord injury who experience shoulder pain propel their handrim wheelchair kinemati-cally differently from individuals with spinal cord injury without shoulder pain. This difference in propulsion technique might be a pain-avoiding mechanism aimed at decreasing shoulder range of motion. [ABSTRACT FROM AUTHOR]

Shoulder Injury Related to Vaccine Administration (SIRVA) is a rare disorder characterized by persistent shoulder pain and limited range of motion presenting within 48 h after vaccine administration. With the widespread distribution of the COVID-19 vaccine, the incidence of SIRVA is expected to rise. This sudden rise in vaccine administration presents an ideal opportunity to estimate the prevalence of SIRVA and to better characterize SIRVA. This study aims to investigate the prevalence of SIRVA following COVID-19 vaccine administration among hospital workers in the Netherlands. A questionnaire was sent to all hospital workers from a single non-academic hospital in the Netherlands. Respondents who had active SIRVA complaints were invited for an outpatient orthopaedic clinic assessment. Data was collected on participant characteristics and physical examination including assessment of active and passive range of motion (ROM). An ultrasound was performed to identify potential abnormalities. 32 out of 981 (3.3%) respondents reported shoulder pain with limited ROM occurring within 48 h after vaccine administration lasting for at least 7 days. Of these 32 respondents with SIRVA, 18 (56.2%) still reported active symptoms at the time of the survey. Clinical examination of 13 (72.2%) respondents with active SIRVA complaints showed limited glenohumeral ROM, limitations in activities of daily living and injection site pain. Twelve out of thirteen (92.3%) respondents with active SIRVA complaints showed abnormalities of the soft-tissue of the shoulder on ultrasound. Physiotherapy was the most common treatment modality for persistent SIRVA complaints (38.9%). The prevalence of SIRVA is estimated at 3% in the adult working population. Signs and symptoms of SIRVA are variable in severity, localization and timing. Soft-tissue abnormalities is the most common clinical sign. This study contributes to clinician's knowledge on SIRVA, aiding in early recognition and treatment, which are imperative for prevention of persistent and severe shoulder pathology. [ABSTRACT FROM AUTHOR]

Background: Shoulder complaints arise from a single pathology or a combination of different underlying pathologies that are hard to differentiate in general practice. Subgroups of pathologies have been identified on the basis of ultrasound imaging that might affect treatment outcomes.Objective: Our aim was to validate the existence of different subgroups of patients with shoulder complaints, based on ultrasound-detected pathology, and compare clinical features among them. Profiling shoulder patients into distinct shoulder pathology phenotypes could help designing tailored treatment trials.Methods: This was a cross-sectional study in general practice. Data were extracted from 840 first visit patient records at a single diagnostic centre in the Netherlands. Exclusion criteria were age <18 years and previous shoulder surgery. Latent class analysis was used to uncover cross-combinations of ultrasound detected pathologies, yielding subgroups of shoulder patients. The uncovered subgroups were compared for demographic and clinical characteristics.Results: We uncovered four distinct subgroups of patients with shoulder complaints: (i) Frozen shoulder group (11%), (ii) Limited pathology group (44%), (iii) Degenerative pathology group (31%) and (iv) Calcifying tendinopathy group (15%). Group comparisons showed significant differences in demographic and clinical characteristics among subgroups, consistent with the literature.Conclusion: In a general practice population, we uncovered four different phenotypes of shoulder patients on the basis of ultrasound detected pathology. These phenotypes can be used designing tailored treatment trials in patients with shoulder complaints. [ABSTRACT FROM AUTHOR]

Background: The first aim of this research was to investigate the current prevalence of musculoskeletal ultrasound in Dutch physiotherapy practices. The second aim was to explore experiences of physiotherapists with musculoskeletal ultrasound in a primary care setting with patients presenting with shoulder complaints.Methods: A random sample of 1000 owners of primary care physiotherapy practices was sent a questionnaire to investigate the prevalence of musculoskeletal ultrasound. A second questionnaire was sent to physiotherapists using musculoskeletal ultrasound to explore experiences with it in patients with shoulder complaints.Results: The net response rate of the first questionnaire was 57.7%. In 18% of the physiotherapy practices musculoskeletal ultrasound was offered. Sixty-nine physiotherapists returned the second questionnaire. Physiotherapists indicated they most often used musculoskeletal ultrasound in patients with shoulder complaints, mainly for suspected tissue damage (83.7%), followed by making a diagnosis (63.3%) and for determining the choice of treatment (36.7%). Physiotherapists reported the biggest advantage was that they were better able to diagnose presenting shoulder complaints. The most frequently mentioned disadvantage of the use of musculoskeletal ultrasound was that assessment is difficult and that there is a risk that findings may not be sufficiently linked to history and physical examination.Conclusion: One in six physiotherapy practices in the Netherlands offer musculoskeletal ultrasound. It is mainly used for patients with shoulder complaints, with an emphasis on detecting tissue damage and as an aid for diagnosis. Physiotherapists trained to work with musculoskeletal ultrasound seem enthusiastic and are at the same time aware of its disadvantages. [ABSTRACT FROM AUTHOR]

Background: Shoulder pain and pain in the upper abdomen are common complaints after laparoscopy, sometimes surpassing the pain at incision sites. The incidence of shoulder pain ranges from 35 to 80%. Post-laparoscopic pain is caused by retention of carbon dioxide in the abdomen, which irritates the phrenic nerve and diaphragm, causing referred pain in the shoulder and in the upper abdomen. A promising strategy to reduce this post-laparoscopic pain is the pulmonary recruitment maneuver, which indirectly increases intraperitoneal pressure and thereby facilitates removal of residual carbon dioxide. An alternative strategy is the infusion of intraperitoneal normal saline. With normal saline infusion, carbon dioxide rises and escapes through the port sites. In addition, normal saline offers a physiologic buffer system to dissolve excess carbon dioxide.Methods/design: This multicenter randomized controlled trial is conducted in two teaching hospitals in the Netherlands. Women between 18 and 65 years of age, with an ASA classification of I-II who are scheduled to undergo an elective laparoscopic procedure with benign gynecologic indication can participate. Following informed consent, participants are randomly allocated into two groups at the end of the surgical procedure. In the intervention group, the upper abdomen is filled with normal saline infusion with the patient in the Trendelenburg position. Then the anesthesiologist performs a standardized pulmonary recruitment maneuver with a pressure of 40 cm H2O. The trocar sleeve valves will be left open, so carbon dioxide can escape the abdominal cavity. With the patient in a neutral position the instruments are removed from the abdomen. In the control group, carbon dioxide is removed from the abdominal cavity at the end of surgery, with gentle abdominal pressure and passive exsufflation through the port sites, with open sleeve valves. The primary outcomes are the incidence and intensity of post-laparoscopic pain in the shoulder, upper abdomen and at the operation sites, at 8, 24 and 48 h after surgery. Secondary outcomes are postoperative use of analgesics, nausea, vomiting and pulmonary complications.Discussion: This study may reduce post-laparoscopic pain in women undergoing laparoscopy.Trial Registration: Dutch trial register, number NTR4812 . [ABSTRACT FROM AUTHOR]

Background. Health care providers need prognostic factors to distinguish between patients who are likely to recover and those who are not likely to recover. Objective. The aim of this study was to: (1) describe the clinical course of recovery and (2) identify prognostic factors of recovery in patients with shoulder pain at the 26-week follow-up. Design. A prospective cohort study was carried out in the Netherlands and included 389 patients who consulted a physical therapist for a new episode of shoulder pain. Method. Participants were followed for 26 weeks. Potential predictors of recovery were selected from the literature and, with the addition of 2 new variables (ie, use of diagnostic ultrasound and working alliance), evaluated in the multivariable regression analysis. Multiple imputation was used to handle missing data, and bootstrap methods were used for internal validation. Results. The recovery rate was 60% for the total population and 65% for the working population after 26 weeks. Short duration of complaints, lower disability scores, having a paid job, better working alliance, and no feelings of anxiety or depression were associated with recovery. In the working population, only duration of complaints and disability remained in the final model. The area under the receiver operating characteristic curve (AUC) for the final model was 0.67 for the total population and 0.63 for the working population. After internal validation, the AUC was corrected to 0.66 and 0.63, respectively. Limitations. External validation of the prognostic model should be done prior to its use in clinical practice. Conclusion. The results of this study indicate that several factors can predict recovery. [ABSTRACT FROM AUTHOR]

Background: Shoulder complaints are common and have an unfavourable prognosis in many patients. Prognostic information is helpful for both patients and clinicians in managing the complaints. The research question was which factors have prognostic value on (un)favourable outcome in patients with shoulder complaints in primary care, secondary care and occupational settings.Methods: Update of a systematic review in primary care, secondary care and occupational settings.Results: Nine articles were published since the original review in 2004. Six were of high quality covering a wide variety of prognostic factors and outcome measures. Four studies were conducted in primary care settings. A best evidence synthesis, including the results of the previous systematic review on this topic shows that there is strong evidence that higher shoulder pain intensity, concomitant neck pain and a longer duration of symptoms predict poorer outcome in primary care settings. In secondary care populations, strong evidence was found for the association between greater disability and poorer outcome and between the existence of previous shoulder pain and poorer outcome.Conclusion: Clinicians may take these factors into account in the management of their patients. Those with a worse prognosis may be monitored more frequently and the treatment plan modified if complaints persist. [ABSTRACT FROM AUTHOR]

OBJECTIVES: To assess the test-retest reliability, construct validity, and responsiveness of the Patient-Specific Functional Scale (PSFS) in patients with a primary shoulder complaint. BACKGROUND: Health measurement outcomes have become increasingly important for evaluating treatment. Patient-specific questionnaires are useful tools for determining treatment goals and evaluating treatment in individual patients. These questionnaires have not yet been validated in patients with nonspecific shoulder pain. METHODS: Patients completed the PSFS, the numeric pain rating scale, and the Shoulder Pain and Disability Index at baseline, and after 1 week and 4 to 6 weeks. Test-retest reliability was determined using intraclass correlation coefficients. To assess convergent validity, change scores of the PSFS were correlated with the numeric pain rating scale and Shoulder Pain and Disability Index change scores. Responsiveness was assessed by calculating the area under the curve, the minimal clinically important change, and minimal detect¬able change, using the global rating of change as an external criterion. RESULTS: Fifty patients (37 men; mean age, 47.7 years) participated in the study. Reliability was high (intraclass correlation coefficient = 0.87; 95% confidence interval [CI]: 0.72, 0.94). The correlations between the change scores of the PSFS and those of the Shoulder Pain and Disability Index and numeric pain rating scale were 0.45 (95% CI: 0.17, 0.80) and 0.55 (95% CI: 0.29, 0.73), respectively. The area under the curve for the PSFS was 0.67 (95% CI: 0.51, 0.83). The minimal detectable change and minimal clinically important change were 0.97 and 1.29 points, respectively. CONCLUSION: These results suggest that the PSFS is a reliable, valid, and responsive instrument that can be used as an evaluative instrument in patients with a primary shoulder complaint. [ABSTRACT FROM AUTHOR]

Rationale, aims and objectives The diagnostic work-up of patients with shoulder pain in general practice is complex. General practitioners' ( GPs) guidelines advise a pragmatic diagnostic work-up in which additional imaging has a limited role. However, diagnostic ultrasounds are increasingly ordered by GPs, which seems to reflect complexity in management of shoulder pain. This study aimed to explore GPs' perspectives on the diagnostic work-up of patients with shoulder pain. Method This study has a qualitative exploratory design with an inductive approach and was carried out in Dutch general practice. The study population consisted of 18 Dutch GPs who were sampled purposefully with a spread in clinical experience and ordering diagnostic ultrasound. Data were gathered by means of semi-structured interviews and analysed following principles of the constant comparative method. Results Three main categories with subcategories emerged that captured the diagnostic work-up of shoulder pain: variety in diagnostic classifications [(non-)specific diagnosis and interdisciplinary differences], establishing strategies for diagnostic work-up (use of existing tools and motives to deviate from existing tools), and strategies dealing with diagnostic uncertainties (accepting diagnostic uncertainties, diagnostic imaging tests, and interdisciplinary consultation and referral). Conclusions Despite the availability of evidence-based shoulder guidelines, GPs experience uncertainties during diagnostic work-up and apply different strategies when dealing with these uncertainties. At some point, GPs as well as patients seem to have a need for a specific diagnosis. Currently, there appears to be little agreement if, or in which phase of shoulder pain, diagnostic ultrasound is useful or indicated. [ABSTRACT FROM AUTHOR]

Introduction: Tonic experimentally induced shoulder pain alters the activation of periscapular muscles1. However, tonic pain may not entirely reproduce the symptoms experienced by people with painful shoulder conditions2 since they commonly report an increase of symptoms during movement. In this study we adopted a novel experimental pain model3 to investigate motor control adaptations of the scapular muscles during movement-evoked pain. Methods: Fifteen healthy participants performed a repeated box-lifting task for twelve sets. Pain was induced over the posterior acromion using electrical stimulation, modulated to induce a pain intensity of 4/10 when the activity of the anterior deltoid was equal or higher than the peak activity measured at baseline, and of 1/10 when lower than 80%. Muscle activity from the Upper (UT), Middle (MT) and Lower (LT) divisions of the Trapezius, and elevation of the scapula, were compared between baseline (sets 1-2), early-and late adaptation (respectively sets 3-4 and 11-12) using a Friedman test and post-hoc comparisons. Results: Early adaptation was characterised by lower scapular elevation (p = 0.002) and decreased activation of the UT (p = 0.006). In the late adaptation phase, participants exhibited lower scapular elevation (p = 0.032), decreased MT activation (p = 0.032) and increased LT activation (p = 0.006). Discussion: Movement-evoked pain results in lower scapular elevation, and different muscle strategies may be responsible for the changes in scapular kinematics in the early-and late-adaptation phase. Those results may provide new insights about motor adaptations and motor control in clinical condition. Process evaluation: Stimulation artifacts in the EMG were removed by filtering. [ABSTRACT FROM AUTHOR]

Introduction: Individuals with shoulder pain commonly present changes in scapular movement and pathoanatomic alterations in the rotator cuff tendons. However, these may not be the main contributors or source of pain in the shoulder. This study compared scapular kinematics and the frequency of pathoanatomic findings across both shoulders of individuals with unilateral shoulder symptoms. Methods: One-hundred and twelve patients (38.1 ± 14.2 years) with unilateral shoulder pain completed the study. Three-dimensional scapular kinematics was measured during arm elevation. The presence of tendinopathy and partial tear of the supraspinatus and infraspinatus was evaluated using magnetic resonance imaging (MRI). A two-way ANOVA (side x angle of arm elevation) was conducted for each scapular rotation. Chi-square tests were used to compare MRI findings. A p-value <0.05 was considered significant. Results: The interactions and main effect of side for scapular internal rotation (mean difference; 95% confidence interval: 0.5°; -0.4°, 1.6°), upward rotation (-0.8°; -1.8°, 0.1°) and posterior tilt (0.3°; -0.6°,1.2°). Supraspinatus tendinopathy (~68%), infraspinatus tendinopathy (~7%), partial tear in the supraspinatus (~17%) and infraspinatus (~5%) tendons were equally present in both shoulders (p > 0.05). Discussion: Scapular movement and pathoanatomic abnormalities in the rotator cuff are similar across shoulders of individuals with unilateral shoulder pain. Process evaluation: Psychosocial aspects should be investigated to help decision-making in the management of patients with shoulder pain. [ABSTRACT FROM AUTHOR]

Post-stroke shoulder pain (PSSP), traditionally regarded as purely nociceptive pain, is often persistent and the mechanisms underlying the pain complaints are not well understood. This explorative study is the first to address the possible changes in cortical somatosensory processing in patients with PSSP. Cortical potentials were recorded following intracutaneous electrostimulaton in stroke patients with chronic PSSP (n= 6), pain-free stroke patients (PF, n=14) and healthy controls (HC, n=20) using EEG. Amplitudes and latencies of both sensory discriminative (N90) as well as cognitive evaluative (N150, P200, the N150-P200 peak-to-peak difference and P300) evoked potential components were evaluated. Stroke was associated with reduced N150 and P300 amplitudes and increased N90, N150 and P300 latencies at both sides. Compared to PF and HC, the P200 and N150-P200 latencies were increased in PSSP patients after stimulation at both sides, even when comparing subgroups with similar lesion size and location. Stroke was associated with reduced sensory-discriminative as well as with reduced cognitive-evaluative cortical somatosensory processing. This reduction was more pronounced in patients with PSSP and may be related to the central effects of persistent nociceptive pain. [ABSTRACT FROM AUTHOR]

Abstract: Objective: The purpose of this study was to examine the effect of manipulative therapy on the shoulder girdle, in addition to usual care provided by the general practitioner, on the outcomes of physical examination tests for the treatment of shoulder complaints. Methods: This was a randomized controlled trial in a primary care setting in the Netherlands. A total of 150 participants were recruited from December 2000 until December 2002. All patients received usual care by the general practitioner. Usual care included one or more of the following depending on the needs of the patient: information/advice, oral analgesics or nonsteroidal antiinflammatory drugs, corticosteroid injections, exercises, and massage. In addition to usual care, the intervention group received manipulative therapy, up to 6 treatment sessions in a 12-week period. Twenty-four physical examination tests were done at baseline and after 6, 12, and 26 weeks. Factor analysis was done to reduce the number of outcome measures. Results: The factor analysis resulted in 4 factors: “shoulder pain,” “neck pain,” “shoulder mobility,” and “neck mobility.” At 6 weeks, no significant differences between groups were found. At 12 weeks, the mean changes of all 4 factors favored the intervention group; the factors “shoulder pain” and “neck pain” reached statistical significance (95% confidence interval [CI], 0.1-2.1). At 26 weeks, differences in the factors “shoulder pain” (95% CI, 0.0-2.6), “shoulder mobility” (95% CI, 0.2-1.7), and “mobility neck” (95% CI, 0.2-1.3) statistically favored the intervention group. Conclusion: In this pragmatic study, manipulative therapy, in addition to usual care by the general practitioner, diminished severity of shoulder pain and neck pain and improved shoulder and neck mobility. [Copyright &y& Elsevier]

Background: Complaints of Arm Neck and Shoulder (CANS) represent a wide range of complaints, which can differ in severity from mild, periodic symptoms to severe, chronic and debilitating conditions. They are thought to be associated with both physical and psychosocial risk factors. The measurement and identification of the various risk factors for these complaints is an important step towards recognizing (a) high risk subgroups that are relevant in profiling CANS; and (b) also for developing targeted and effective intervention plans for treatment. The purpose of the present study was to investigate the prevalence of CANS in a Dutch population of computer workers and to develop a questionnaire aimed at measuring workplace physical and psychosocial risk factors for the presence of these complaints. Methods: To examine potential workplace risk factors for the presence of CANS, the Maastricht Upper Extremity Questionnaire (MUEQ), a structured questionnaire, was developed and tested among 264 computer office workers of a branch office of the national social security institution in the Netherlands. The MUEQ holds 95 items covering demographic characteristics, in addition to seven main domains assessing potential risk factors with regard to (1) work station, (2) posture during work, (3) quality of break time, (4) job demands, (5) job control, and (6) social support. The MUEQ further contained some additional questions about the quality of the work environment and the presence of complaints in the neck, shoulder, upper and lower arm, elbow, hand and wrist. The prevalence rates of CANS in the past year were computed. Further, we investigated the psychometric properties of the MUEQ (i.e. factor structure and reliability). Results: The one-year prevalence rate of CANS indicated that 54% of the respondents reported at least one complaint in the arm, neck and/or shoulder. The highest prevalence rates were found for neck and shoulder symptoms (33% and 31% respectively), followed by hand and upper arm complaints (11% to 12%) and elbow, lower arm and wrist complaints (6% to 7%). The psychometric properties of the MUEQ were assessed using exploratory factor analysis which resulted in the identification of 12 factors. The calculation of internal consistency and cross validation provided evidence of reliability and lack of redundancy of items. Conclusion: Neck and shoulder complaints are more frequently reported among Dutch computer workers than arm, elbow and hand complaints. The results further indicate that the MUEQ has satisfactory reliability and internal consistency when used to document CANS among computer workers in the Netherlands. [ABSTRACT FROM AUTHOR]

Background: Neck and shoulder complaints are common in primary care physiotherapy. These patients experience pain and disability, resulting in high societal costs due to, for example, healthcare use and work absence. Content and intensity of physiotherapy care can be matched to a patient's risk of persistent disabling pain. Mode of care delivery can be matched to the patient's suitability for blended care (integrating eHealth with physiotherapy sessions). It is hypothesized that combining these two approaches to stratified care (referred to from this point as Stratified Blended Approach) will improve the effectiveness and cost-effectiveness of physiotherapy for patients with neck and/or shoulder complaints compared to usual physiotherapy., Methods: This paper presents the protocol of a multicenter, pragmatic, two-arm, parallel-group, cluster randomized controlled trial. A total of 92 physiotherapists will be recruited from Dutch primary care physiotherapy practices. Physiotherapy practices will be randomized to the Stratified Blended Approach arm or usual physiotherapy arm by a computer-generated random sequence table using SPSS (1:1 allocation). Number of physiotherapists (1 or > 1) will be used as a stratification variable. A total of 238 adults consulting with neck and/or shoulder complaints will be recruited to the trial by the physiotherapy practices. In the Stratified Blended Approach arm, physiotherapists will match I) the content and intensity of physiotherapy care to the patient's risk of persistent disabling pain, categorized as low, medium or high (using the Keele STarT MSK Tool) and II) the mode of care delivery to the patient's suitability and willingness to receive blended care. The control arm will receive physiotherapy as usual. Neither physiotherapists nor patients in the control arm will be informed about the Stratified Blended Approach arm. The primary outcome is region-specific pain and disability (combined score of Shoulder Pain and Disability Index & Neck Pain and Disability Scale) over 9 months. Effectiveness will be compared using linear mixed models. An economic evaluation will be performed from the societal and healthcare perspective., Discussion: The trial will be the first to provide evidence on the effectiveness and cost-effectiveness of the Stratified Blended Approach compared with usual physiotherapy in patients with neck and/or shoulder complaints., Trial Registration: Netherlands Trial Register: NL8249 . Officially registered since 27 December 2019. Date of first enrollment: 30 September 2020. Study status: ongoing, data collection.

Background: Disorders of the rotator cuff are a common musculoskeletal pain presentation in the general population, and treatment by a physiotherapist is often prescribed. In 2011, 2016, surveys of physiotherapy practice in the United Kingdom (UK) were performed, which reported that advice and exercise were the most common treatment strategies used. The aim of this current survey was to examine current physiotherapy practice in Belgium and The Netherlands, with consideration of differences between physiotherapists who were members of a shoulder network and physiotherapists who were not., Methods: During February/March 2018, a cross-sectional online survey was conducted in Belgium and The Netherlands., Results: 505 physiotherapists completed the survey. Advice (n = 362/505), isotonic exercises (n = 302/505) and scapular stabilisation exercises (n = 359/505) were the most common treatment modalities for patients with rotator cuff disorders. Physiotherapists not part of a shoulder network group more commonly integrated mobilization (n = 66/254 SN, n = 125/251 N-SN), electrotherapy (n = 1/254 SN, n = 19/251 N-SN) and massage (n = 48/254 SN, n = 89/251 N-SN) compared to those who were member of the group., Conclusion: Advice and exercise were the most common treatment prescriptions, which aligns with recommendations from current research evidence. Practice differs between physiotherapists involved with a shoulder network group compared to those who are not., (Copyright © 2019 Elsevier Ltd. All rights reserved.)

The article presents the study "The Accuracy of Subacromial Injections: A Prospective Randomized Magnetic Resonance Imaging Study," by H-E Henkus, L. P. Cobben, E. G. Coerkamp, R. G. Nelissen and E. R. van Arkel, originally published in "Arthroscopy." The study, which involved adult patients with subacromial impingement from orthopedic departments in Netherlands, concludes that injections into the subacromial bursa using an anteromedial or posterior route is sufficiently accurate to be of diagnostic or therapeutic value. A commentary on the study by Nick Mohtadi from University of Calgary in Canada is also presented.

Objectives: Recently, a rule was developed to predict sick leave related to shoulder pain during a period of 6 months after patients have consulted a general practitioner for a new episode of shoulder pain. The objective was to evaluate the generalizability of this prediction rule by testing it in two other populations of workers who had gone for a consultation in primary care for a new episode of shoulder pain., Methods: The prediction rule was derived in a prognostic cohort study (N=350). The outcome was sick leave related to shoulder pain during 6 months following the first consultation. The rule was tested on merged control groups from three trials on shoulder pain (N=128). In addition to this population, a recently conducted study on musculoskeletal disorders (N=224) was used to validate the prediction rule. The generalizability of the prediction rule was tested by studying calibration and discrimination in the validation cohorts., Results: The prediction rule showed reasonable calibration in both validation cohorts. The discriminative ability, with an area under the receiver operating characteristic (ROC) curve (AUC) of 0.70 in the derivation cohort was stable in the cohort of the musculoskeletal disorder study (AUC 0.71). In the control groups of the three randomized controlled trials of a Dutch shoulder study, the discriminative ability decreased to an AUC of 0.66., Conclusions: The prediction rule for sick leave related to shoulder pain in a 6-month period following the first consultation in primary care showed adequate generalizability to another population of workers with shoulder pain participating in an observational cohort study. In the control groups of the three randomized controlled trials the prediction rule performed less well.

Introduction: The objective of the present study is to describe the extent of productivity loss among computer workers with neck/shoulder symptoms and hand/arm symptoms, and to examine associations between pain intensity, various physical and psychosocial factors and productivity loss in computer workers with neck/shoulder and hand/arm symptoms., Methods: A cross-sectional design was used. The study population consisted of 654 computer workers with neck/shoulder or hand/arm symptoms from five different companies. Descriptive statistics were used to describe the occurrence of self-reported productivity loss. Logistic regression analyses were used to examine the associations., Results: In 26% of all the cases reporting symptoms, productivity loss was involved, the most often in cases reporting both symptoms (36%). Productivity loss involved sickness absence in 11% of the arm/hand cases, 32% of the neck/shoulder cases and 43% of the cases reporting both symptoms. The multivariate analyses showed statistically significant odds ratios for pain intensity (OR: 1.26; CI: 1.12-1.41), for high effort/no low reward (OR: 2.26; CI: 1.24-4.12), for high effort/low reward (OR: 1.95; CI: 1.09-3.50), and for low job satisfaction (OR: 3.10; CI: 1.44-6.67). Physical activity in leisure time, full-time work and overcommitment were not associated with productivity loss., Conclusion: In most computer workers with neck/shoulder symptoms or hand/arm symptoms productivity loss derives from a decreased performance at work and not from sickness absence. Favorable psychosocial work characteristics might prevent productivity loss in symptomatic workers.

Objective: To examine among adolescents (1) the prevalence of neck/shoulder, low back, and arm pain within different sociodemographic groups and (2) the association of neck/shoulder, low back, and arm pain with computer use, physical activity, depression, and stress., Methods: A school-based questionnaire survey in 2002 and 2003 of neck/shoulder, low back, and arm pain, computer use, physical activity, depression, and stress. The survey was given to 3485 adolescents aged 12 to 16 years who attended secondary schools in Amsterdam, Netherlands., Results: The overall prevalence of neck/shoulder, low back, and arm pain was 11.5%, 7.5%, and 3.9%, respectively. The prevalence of neck/shoulder pain was higher among girls and adolescents not living with both parents. The prevalence of low back pain also was higher among girls. Depressive symptoms were associated with neck/shoulder pain, low back pain, and arm pain. The stress experienced was associated with neck/shoulder pain and with low back pain., Conclusions: This study strengthens the findings that musculoskeletal pain is common among adolescents and is associated with depression and stress but not with computer use and physical activity.