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Disability of the Arm, Shoulder and Hand questionnaire in Swedish patients with rheumatoid arthritis: A validity
Annelie Bilberg1, Tomas Bremell, Kaisa Mannerkorpi
1Institute of Medicine, Department of Rheumatology and Inflammation Research, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden. annelie.bilberg@vgregion.se
Objective:
The aim of this study was to assess the reliability and validity of the Disability of the Arm, Shoulder and Hand (DASH) questionnaire in a Swedish rheumatoid arthritis population.
Methods:
To investigate the concurrent and convergent validity, 67 patients with rheumatoid arthritis completed the DASH, the Health Assessment Questionnaire Disability Index (HAQ) and activity-induced pain. Active shoulder-arm motion, handgrip force and disease activity (Disease Activity Score in 28 joints; DAS28) were assessed. The test-retest reliability was investigated in 26 patients. Face validity was also investigated.
Results:
Spearman’s correlation coefficient revealed a significant association (p < 0.001) between the DASH score and HAQ index (rs 0.80), confirming satisfactory concurrent validity. A significant association (p ≤ 0.02) was found between the DASH score and active shoulder-arm motion (rs –0.38 to –0.50), handgrip force (rs –0.46 to –0.59), activity-induced pain (rs 0.66) and DAS28 (rs 0.63), confirming satisfactory convergent validity for the DASH questionnaire. Satisfactory test-retest reliability (intraclass correlation coefficient 0.99, 95% confidence interval 0.98–0.99) and face validity of the questionnaire were confirmed.
Conclusion:
The DASH questionnaire showed satisfactory test-retest reliability, concurrent-, convergent-, and face validity for patients with rheumatoid arthritis and can be recommended for use in rheumatoid arthritis populations.
