Rheumatology Advance Access originally published online on August 10, 2004
Rheumatology 2004 43(11):1434-1440; doi:10.1093/rheumatology/keh367
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Rheumatology Vol. 43 No. 11 © British Society for Rheumatology 2004; all rights reserved
PAPER |
Development and validation of an elbow score
Department of Musculoskeletal Science, Royal Liverpool University Hospital and Liverpool Upper Limb Surgery Unit, Royal Liverpool University Hospital, Liverpool, UK
Correspondence to: S. P. Frostick, Department of Musculoskeletal Science, University of Liverpool, Liverpool L69 3GA, UK. E-mail: s.p.frostick{at}liv.ac.uk
Objectives. Few of the questionnaires available for evaluating the function and clinical state of the elbow have been validated. An ideal score would be consistent, sensitive, reliable and elbow-specific, incorporating both patient perception and clinician assessment. This was our aim.
Methods. Items were generated using 25 patients and expert opinion, and reduced using 25 new patients to yield a nine-item patient questionnaire and a six-item clinical evaluation (of strength, motion and ulnar nerve involvement). This was validated using 63 new patients (of whom 28 were studied twice without therapy and 18 were studied again after appropriate surgery).
Results. The test–retest reliability coefficient of determination (R2 = 0.93) and internal consistency (Cronbach's alpha = 0.98) were both good. Convergent validity was attested by good correlations with other scores, the Disabilities of Arm, Shoulder and Hand Questionnaire (DASH) and the Nottingham Health Profile (NHP) (physical) (R2 = 0.62 and 0.29, P<0.0005). Sensitivity to change was demonstrated by correlating preoperative–postoperative changes to those in DASH and NHP (physical) (R2 = 0.50 and 0.27, P<0.04).
Conclusion. This is a reliable, internally consistent score, correlating well with other, non-elbow specific scores and sensitive to change on treatment.
KEY WORDS: Clinical score, Elbow, Outcome measure, Validation
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