Anat Scheiman-Elazary1, Veena K Ranganath2, Ami Ben-Artzi3, Suzanne Kafaja2, Nabeel H Borazan2, Thasia Woodworth2, Lewei Duan4, David Elashoff5, Philip Clements2, Daniel E Furst2,6,7. 1. Rheumatology Unit, Division of Medicine, Hadassah Medical Center, Jerusalem, Israel. 2. Division of Rheumatology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA. 3. Cedars-Sinai Medical Center, Los Angeles, CA, USA. 4. Kaiser Permanente, Los Angeles, CA, USA. 5. Division of General Internal Medicine and Health Services Research, University of California, Los Angeles, Los Angeles, CA, USA. 6. University of Washington, Seattle, WA, USA. 7. University of Florence, Florence, Italy.
Abstract
Objectives: Validating musculoskeletal ultrasound features of the joints and tendons of the hands in a large scleroderma cohort. Methods: A total of 81 scleroderma patients participated in this prospective, cross-sectional study. Grayscale and power Doppler musculoskeletal ultrasound images of 13 joints and 5 tendons of the wrist and hand were obtained. Clinical assessment included modified Rodnan skin thickness score, joint count, and Scleroderma Health Assessment Questionnaire. Face validity, content validity, construct validity, and feasibility were assessed. Results: Mean age was 53.8 years (range 22-80), 76.5% were females, and disease duration ranged from 0.25 to 29 years. Mean length of the examination was 36 min. Scleroderma Health Assessment Questionnaire-Disability Index correlated with musculoskeletal ultrasound erosions (r = 0.5, p = 0.0003). Skin score correlated with tendinitis grayscale (r = 0.26, p = 0.02). Intra-reader correlation coefficient for musculoskeletal ultrasound was 0.96 for the joints and could not be calculated for tendons because there were too few positive findings. When tendon changes existed, percent of agreement was 77.7%-83.3%. Conclusion: Musculoskeletal ultrasound of 13 joints and 5 tendons of the hands and wrist has face and content validity. Construct validity was shown for the tendons and erosion scores. Feasibility and reliability were partially validated.
Objectives: Validating musculoskeletal ultrasound features of the joints and tendons of the hands in a large scleroderma cohort. Methods: A total of 81 scleroderma patients participated in this prospective, cross-sectional study. Grayscale and power Doppler musculoskeletal ultrasound images of 13 joints and 5 tendons of the wrist and hand were obtained. Clinical assessment included modified Rodnan skin thickness score, joint count, and Scleroderma Health Assessment Questionnaire. Face validity, content validity, construct validity, and feasibility were assessed. Results: Mean age was 53.8 years (range 22-80), 76.5% were females, and disease duration ranged from 0.25 to 29 years. Mean length of the examination was 36 min. Scleroderma Health Assessment Questionnaire-Disability Index correlated with musculoskeletal ultrasound erosions (r = 0.5, p = 0.0003). Skin score correlated with tendinitis grayscale (r = 0.26, p = 0.02). Intra-reader correlation coefficient for musculoskeletal ultrasound was 0.96 for the joints and could not be calculated for tendons because there were too few positive findings. When tendon changes existed, percent of agreement was 77.7%-83.3%. Conclusion: Musculoskeletal ultrasound of 13 joints and 5 tendons of the hands and wrist has face and content validity. Construct validity was shown for the tendons and erosion scores. Feasibility and reliability were partially validated.
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