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