title: Relative validity of the modified American Shoulder and Elbow Surgeons (M-ASES) questionnaire using item response theory.
abstract: The modified American Shoulder and Elbow Surgeon's (M-ASES) questionnaire is purported to be a non-region specific functional measure of the entire upper extremity. The purpose of this study was to determine the factor structure of the M-ASES and to determine item-fit of the M-ASES using item response theory (IRT). Analyses included univariate baseline demographics, factor analysis, convergent/construct validation with the SF-12, and graded response IRT of the M-ASES. 964 patients of an orthopedic practice with a variety of upper extremity dysfunctions participated in this trial. The M-ASES demonstrated two dimensions (wrist/hand and shoulder dysfunction) and exhibited excellent discrimination and threshold specification. The instrument correlated well with the mental and physical dimensions of the SF-12. The M-ASES should be considered an excellent tool for measure of whole upper extremity dysfunction.
authors: Centers of Excellence in Surgical Outcomes, Duke University, Durham, USA. chad.cook@duke.edu
authors: Chad
authors: C
authors: Cook
authors: Eric
authors: E
authors: Hegedus
authors: Adam
authors: A
authors: Goode
authors: Curtis
authors: C
authors: Mina
authors: Ricardo
authors: R
authors: Pietrobon
authors: Lawrence D
authors: LD
authors: Higgins
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D003625:Data Collection; D004551:Elbow Joint / Q000503:physiopathology; D005163:Factor Analysis, Statistical; D005260:Female; D006305:Health Status Indicators; D006801:Humans; D008297:Male; D008875:Middle Aged; D015233:Models, Statistical; D009140:Musculoskeletal Diseases / Q000503:physiopathology; D017063:Outcome Assessment, Health Care / Q000379:methods*; D010358:Patient Participation; D015203:Reproducibility of Results; D012647:Self-Assessment; D000070599:Shoulder Injuries; D012785:Shoulder Joint / Q000503:physiopathology; D012955:Societies, Medical; D011795:Surveys and Questionnaires; D055815:Young Adult; D000092464:Elbow Injuries
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