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Table 5 Internal consistency and test-retest reliability of the DASH, QuickDASH, WORKDASH and SPAMDASH (for those reporting “the same” at Test 2)

From: Linguistic validation, validity and reliability of the British English versions of the Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire and QuickDASH in people with rheumatoid arthritis

  Cronbach’s alpha n for test-retest Test 1 score (median, IQR) Test 2 score (median, IQR) Spearman’s Correlation (rs) ICC(2,1) (95% CI)
DASH 0.98 170 30.83 (15.83–55.00) 30.00 (12.50–53.33) 0.95** 0.97 (0.96,0.98)
QuickDASH 0.94 180 29.55 (13.63–47.73) 30.00 (13.63–53.41) 0.93** 0.95 (0.94,0.96)
WORKDASH 0.94 53 25.00 (6.25–37.50) 25.00 (0–37.50) 0.74**
SPAMDASH 0.97 19 25.00 (12.50–48.44) 25.00 (18.75–75.00) 0.92**
  1. Key: Spearman’s correlations; ** p < 0.001