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Table 8 Conversation table - Physical domain (10 items)—raw summed scores to predicted Rasch person scores for SF-HDQ physical domain

From: Developing a short-form version of the HIV Disability Questionnaire (SF-HDQ) for use in clinical practice: a Rasch analysis

Physical domain (10 items)
Raw summed score—total
Range: 0–39
Model predicted person score (location) Model predicted person score (0–100 scale)
0 − 4.075 0
1 − 3.261 6
2 − 2.703 11
3 − 2.321 16
4 − 2.026 20
5 − 1.783 24
6 − 1.575 28
7 − 1.393 31
8 − 1.230 34
9 − 1.083 37
10 − 0.948 39
11 − 0.823 41
12 − 0.705 43
13 − 0.594 45
14 − 0.489 46
15 − 0.387 47
16 − 0.289 48
17 − 0.194 49
18 − 0.101 50
19 − 0.009 51
20 0.082 52
21 0.173 53
22 0.264 54
23 0.356 55
24 0.450 56
25 0.546 57
26 0.645 59
27 0.748 60
28 0.856 62
29 0.970 64
30 1.093 66
31 1.226 68
32 1.371 71
33 1.535 74
34 1.722 77
35 1.943 81
36 2.215 85
37 2.573 90
38 3.107 95
39 3.903 100