Rheumatology International

, Volume 28, Issue 3, pp 217–223 | Cite as

Relative validity of the modified American Shoulder and Elbow Surgeons (M-ASES) questionnaire using item response theory

  • Chad CookEmail author
  • Eric Hegedus
  • Adam Goode
  • Curtis Mina
  • Ricardo Pietrobon
  • Lawrence D. Higgins
Original Article


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.


Item response theory M-ASES American Shoulder and Elbow Surgeon’s questionnaire 


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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Chad Cook
    • 1
    • 2
    Email author
  • Eric Hegedus
    • 2
  • Adam Goode
    • 2
  • Curtis Mina
    • 3
  • Ricardo Pietrobon
    • 1
  • Lawrence D. Higgins
    • 4
  1. 1.Centers of Excellence in Surgical OutcomesDuke UniversityDurhamUSA
  2. 2.Department of Community and Family MedicineDuke UniversityDurhamUSA
  3. 3.Division of Orthopedic SurgeryHospital for Special SurgeryNew YorkUSA
  4. 4.Department of Orthopedic SurgeryBrigham and Women’s HospitalBostonUSA

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