Fear of movement and emotional distress as prognostic factors for disability in patients with shoulder pain: a prospective cohort study.

BACKGROUND: Shoulder pain is a prevalent and often long-lasting musculoskeletal disorder. The overall prognosis of shoulder pain is highly variable with 40-50% of patients reporting persistent pain 6-12 months after consulting a clinician. The evidence for psychological prognostic factors for patients with shoulder pain is inconsistent. Therefore, the objective of this study was to investigate the association between fear of movement and emotional distress at presentation and self-reported disability over one year of follow-up. METHODS: This is a prospective cohort study of consecutive patients referred to secondary outpatient care due to shoulder pain. Consenting patients underwent a physical examination and completed a comprehensive questionnaire at baseline, three months-, and one-year follow-up. Associations between baseline fear of movement (0-10) or emotional distress (1-4), respectively, and patient reported disability measured using Quick Disability of the Arm and Shoulder (QuickDASH, 0-100) over one year were analyzed with linear mixed-effects models (LMM) for repeated measures (baseline, 3 months and 1 year), adjusting for established prognostic factors. RESULTS: A total of 138 patients were recruited between March 2015 and January 2018, with response rates of 84.7% (n = 117) and 79.7% (n = 100) at three months and one year, respectively. Adjusted associations revealed that for every point increase in baseline fear of movement, the QuickDASH score increased (worsened) by 1.10 points (95% CI 0.2-2.0) over the follow-up year. For every point increase in baseline emotional distress, the QuickDASH score increased by 19.9 points (95% CI 13.9-25.9) from baseline over the follow-up year. CONCLUSION: Higher fear of movement and emotional distress scores at baseline were significantly associated with higher disability over one year in patients with shoulder pain referred to secondary care. Our study indicates that these psychological factors affect prognosis and should be considered by clinicians and researchers working with patients with shoulder pain.

What Are the Most Important Problems in Functioning Among Patients With Shoulder Pain? An Analysis of the Patient-Specific Functional Scale.

OBJECTIVE: The purpose of this study was to identify important functional problems among individuals with shoulder pain using the Patient-Specific Functional Scale (PSFS) and to investigate differences between individuals receiving primary care and individuals receiving secondary care. METHODS: In this cross-sectional study located in a primary and secondary care outpatient clinic, a total of 177 individuals seeking care for shoulder pain (84 from primary care and 93 from secondary care) were recruited. Background variables, pain, physical activity, and PSFS responses were collected using a questionnaire software package. Meaningful concepts were linked from the PSFS responses to the International Classification of Functioning, Disability and Health (ICF) according to established rules. Frequencies for the ICF categories were estimated separately for primary care and secondary care. Differences between primary care and secondary care were investigated by calculating CIs for the sample proportions at ICF chapter level. RESULTS: The primary care sample reported functional problems linked to 226 ICF categories, whereas the secondary care sample reported functional problems linked to 337 ICF categories. Of the linked ICF categories, 87.7% belonged to the Activities and Participation component of the ICF. Seventeen categories were identified in >3% of the individuals; of those, the most frequent categories were recreation and leisure, lifting and carrying objects, doing housework, hand and arm use, and remunerative employment. Categories included in the ICF chapters of self-care and domestic life were significantly more frequent in the secondary care sample, whereas there was a trend that neuromusculoskeletal and movement-related functions were more frequent in primary care. CONCLUSION: The present findings indicate that individuals with shoulder pain report a wide range of functional problems, from basic functions related to mobility to activities related to work and leisure. This study also discovered differences between patients in primary care and secondary care. The large variation in the experiences between people supports the use of an individualized measure in assessments. IMPACT: This study adds new knowledge about problems in functioning among people with shoulder pain and how the individual experience varies between primary care and secondary care settings. Moreover, the content analyses used in this study showed the full potential of the ICF classification and should have potential for further application.