VALIDATION OF THE RUSSIAN SHOULDER PAIN LEVEL TEST-QUESTIONARY FOR DETECTION OF PATIENTS WITH SUBACROMIAL IMPINGEMENT SYNDROME

Abstract

Despite multiple available international scales for assessment of anatomical and functional features of shoulder joint, no unified Russian survey for shoulder joint assessment in patients with subacromial impingement syndrome (SIS) has been developed so far.Purpose — to develop and validate a test-questionary for shoulder pain (SSp) to diagnose SIS in patients with chronic pain syndrome in the shoulder joint.Material and Methods. Score for shoulder pain (SSp) was validated based on 252 questionnaires including the group of 144 patients with SIS and control group of 108 patients without SIS. age of patients ranged from 50 to 80 years. clinical diagnosis was established using integral clinical and imaging examinations. Internal consistency of survey was evaluated by calculating the cronbach’s alpha. Significance of each question was assessed by calculation of odds ratio (OR). Sensitivity, specificity, accuracy and validation threshold for SIS diagnostics were determined by measuring the area under curve (auc). Re-testing reliability was evaluated by intra-class correlation coefficient (Icc) in 60 patients with an interval of 1–3 days. convergent validity was assessed with aSeS and VaS scores. Results. Informative value of the full version of SSp was as follows: 97% sensitivity, 90% specificity, 0.96% auc (95% cI 0,93–0,98), р0,0001. youden’s index (j) equaled 0.88. Validity threshold for SIS diagnostics was above 18. Intra-class correlation coefficient (Icc) was 0,98 (95% cI 0,98–0,99). The authors reported a high inverse correlation with aSeS scale ρ = -0,9498 (r = -0,95; p0,001) and direct correlation with VaS scale ρ = 0,8279 (r = 0,83; p0,001). application of a logic regression resulted in a suggested short version of survey which included 13 questions with threshold for SIS diagnosis above 14 scores. This provided for improvement of intra-test reliability up to 0,93 (95% cI up to 0,91) and the level of clinical use of the short survey version.Conclusion. Short version of survey for shoulder pain (SSp) consisting of 13 questions was validated for clinical use and SIS diagnostics in patients of elderly and middle age with chronic shoulder pain.