Article

OBJECTIVE: To develop and assess the reliability and validity of a
patient-reported measure of hand activity performance for persons with rheumatoid
arthritis (MAP-Hand). METHODS: The development of the measure included a
literature review, semi-structured interviews with 60 patients with rheumatoid
arthritis, and testing of face and content validity by video-observation and
classification of the initial items according to standardized methods. Further
testing followed 2 surveys of 176 and 134 patients with rheumatoid arthritis and
included Rasch analysis and comparing MAP-Hand scores with other measures of
symptoms and functional ability. Test-retest reliability was assessed in 35
stable patients with rheumatoid arthritis. RESULTS: Most of the initial 31 items
had good face and content validity. Following Rasch analysis the measure was
reduced to 18 items, which had good evidence for unidimensionality, a broad range
of item difficulty, good person separation and ordered thresholds in a 4-point
scale. The test-retest intraclass correlation coefficient was 0.94 (95%
confidence interval 0.89, 0.97), indicating high reliability. The results of
validity testing generally followed the a priori hypotheses, with MAP-Hand scores
having moderate to high correlations with scores for the other measures.
CONCLUSION: The MAP-Hand is an 18-item patient-reported measure of hand activity
performance, which showed good evidence for reliability and validity in patients
with rheumatoid arthritis.

Langue : ANGLAIS