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Table 1 Raw score to interval scale Rasch Metric for DASH and QUICKDASH

From: Revisiting the disabilities of the arm, shoulder and hand (DASH) and QuickDASH in rheumatoid arthritis

DASH Raw DASH DASH QuickDASH Raw QuickDASH DASH
(0–4) Standard Rasch (0–4) Standard Rasch
0 0.0 0.0 0 0.0 0.0
1 0.8 5.5 1 2.3 6.4
2 1.7 9.1 2 4.5 11.5
3 2.5 11.5 3 6.8 15.6
4 3.3 13.3 4 9.1 19.4
5 4.2 14.9 5 11.4 23.0
6 5.0 16.3 6 13.6 26.4
7 5.8 17.6 7 15.9 29.6
8 6.7 18.9 8 18.2 32.7
9 7.5 20.1 9 20.5 35.5
10 8.3 21.3 10 22.7 38.2
11 9.2 22.5 11 25.0 40.7
12 10.0 23.6 12 27.3 43.0
13 10.8 24.7 13 29.5 45.2
14 11.7 25.8 14 31.8 47.3
15 12.5 26.8 15 34.1 49.2
16 13.3 27.9 16 36.4 51.0
17 14.2 28.9 17 38.6 52.8
18 15.0 29.9 18 40.9 54.4
19 15.8 30.8 19 43.2 55.9
20 16.7 31.8 20 45.5 57.4
21 17.5 32.7 21 47.7 58.8
22 18.3 33.6 22 50.0 60.1
23 19.2 34.5 23 52.3 61.4
24 20.0 35.4 24 54.5 62.7
25 20.8 36.2 25 56.8 63.9
26 21.7 37.0 26 59.1 65.1
27 22.5 37.8 27 61.4 66.4
28 23.3 38.6 28 63.6 67.6
29 24.2 39.4 29 65.9 68.9
30 25.0 40.2 30 68.2 70.1
31 25.8 40.9 31 70.5 71.4
32 26.7 41.6 32 72.7 72.8
33 27.5 42.3 33 75.0 74.3
34 28.3 43.0 34 77.3 75.8
35 29.2 43.7 35 79.5 77.3
36 30.0 44.3 36 81.8 79.0
37 30.8 45.0 37 84.1 80.7
38 31.7 45.6 38 86.4 82.6
39 32.5 46.2 39 88.6 84.5
40 33.3 46.8 40 90.9 86.6
41 34.2 47.4 41 93.2 88.9
42 35.0 48.0 42 95.5 91.5
43 35.8 48.6 43 97.7 95.1
44 36.7 49.1 44 100.0 100.0
45 37.5 49.7    
46 38.3 50.2    
47 39.2 50.7    
48 40.0 51.3    
49 40.8 51.8    
50 41.7 52.3    
51 42.5 52.8    
52 43.3 53.2    
53 44.2 53.7    
54 45.0 54.2    
55 45.8 54.7    
56 46.7 55.1    
57 47.5 55.6    
58 48.3 56.0    
59 49.2 56.5    
60 50.0 56.9    
61 50.8 57.3    
62 51.7 57.8    
63 52.5 58.2    
64 53.3 58.6    
65 54.2 59.1    
66 55.0 59.5    
67 55.8 59.9    
68 56.7 60.3    
69 57.5 60.7    
70 58.3 61.2    
71 59.2 61.6    
72 60.0 62.0    
73 60.8 62.4    
74 61.7 62.9    
75 62.5 63.3    
76 63.3 63.7    
77 64.2 64.1    
78 65.0 64.6    
79 65.8 65.0    
80 66.7 65.5    
81 67.5 65.9    
82 68.3 66.3    
83 69.2 66.8    
84 70.0 67.3    
85 70.8 67.7    
86 71.7 68.2    
87 72.5 68.7    
88 73.3 69.2    
89 74.2 69.6    
90 75.0 70.2    
91 75.8 70.7    
92 76.7 71.2    
93 77.5 71.7    
94 78.3 72.2    
95 79.2 72.8    
96 80.0 73.3    
97 80.8 73.9    
98 81.7 74.5    
99 82.5 75.1    
100 83.3 75.7    
101 84.2 76.3    
102 85.0 76.9    
103 85.8 77.6    
104 86.7 78.2    
105 87.5 78.9    
106 88.3 79.6    
107 89.2 80.3    
108 90.0 81.0    
109 90.8 81.8    
110 91.7 82.5    
111 92.5 83.3    
112 93.3 84.1    
113 94.2 85.0    
114 95.0 86.0    
115 95.8 87.1    
116 96.7 88.3    
117 97.5 89.8    
118 98.3 91.8    
119 99.2 95.0    
120 100.0 100.0