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- W2040558616 abstract "Hypothesis Classification systems for glenohumeral instability (GHI) are opinion based, not validated, and poorly defined. The hypothesis driving this investigation is that a classification system with content validity will have high inter-observer and intra-observer agreement. Materials and methods The classification system was developed by first conducting systematic literature review that identified 18 systems for classifying GHI. The frequency of characteristics used was recorded. Additionally, 31 members of the American Shoulder and Elbow Surgeons responded to a survey to identify features important to characterize GHI. Frequency, etiology, direction, and severity (FEDS) were most important. Frequency was defined as solitary (1 episode), occasional (2 to 5 times/y), or frequent (>5 times/year). Etiology was defined as traumatic or atraumatic. Direction referred to the primary direction of instability (anterior, posterior, or inferior). Severity was subluxation or dislocation. For reliability testing, 50 GHI patients completed a questionnaire at their initial visit. One of 6 sports medicine fellowship-trained physicians completed a similar questionnaire after examining the patient. Patients returned after 2 weeks and were examined by the original physician and 2 other physicians. Interrater and intrarater agreement for the FEDS classification system was calculated. Results Agreement between patients and physicians was lowest for frequency (39%; κ = 0.130) and highest for direction (82%; κ = 0.636). Physician intrarater agreement was 84% to 97% for the individual FEDS characteristics (κ = 0.69-0.87), and interrater agreement was 82% to 90% (κ = 0.44-0.76). Conclusions The FEDS system has content validity and is highly reliable for classifying GHI. Physical examination using provocative testing to determine the primary direction of instability produces very high levels of interrater and intrarater agreement. Classification systems for glenohumeral instability (GHI) are opinion based, not validated, and poorly defined. The hypothesis driving this investigation is that a classification system with content validity will have high inter-observer and intra-observer agreement. The classification system was developed by first conducting systematic literature review that identified 18 systems for classifying GHI. The frequency of characteristics used was recorded. Additionally, 31 members of the American Shoulder and Elbow Surgeons responded to a survey to identify features important to characterize GHI. Frequency, etiology, direction, and severity (FEDS) were most important. Frequency was defined as solitary (1 episode), occasional (2 to 5 times/y), or frequent (>5 times/year). Etiology was defined as traumatic or atraumatic. Direction referred to the primary direction of instability (anterior, posterior, or inferior). Severity was subluxation or dislocation. For reliability testing, 50 GHI patients completed a questionnaire at their initial visit. One of 6 sports medicine fellowship-trained physicians completed a similar questionnaire after examining the patient. Patients returned after 2 weeks and were examined by the original physician and 2 other physicians. Interrater and intrarater agreement for the FEDS classification system was calculated. Agreement between patients and physicians was lowest for frequency (39%; κ = 0.130) and highest for direction (82%; κ = 0.636). Physician intrarater agreement was 84% to 97% for the individual FEDS characteristics (κ = 0.69-0.87), and interrater agreement was 82% to 90% (κ = 0.44-0.76). The FEDS system has content validity and is highly reliable for classifying GHI. Physical examination using provocative testing to determine the primary direction of instability produces very high levels of interrater and intrarater agreement." @default.
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- W2040558616 date "2011-06-01" @default.
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- W2040558616 title "Development and reliability testing of the frequency, etiology, direction, and severity (FEDS) system for classifying glenohumeral instability" @default.
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- W2040558616 doi "https://doi.org/10.1016/j.jse.2010.10.027" @default.
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