Table 2.
Items, measures, and item statistics of the 10-item version of the DLQI
| Item No. | Item description | Item measure (Location valuea) | Item fit statistics (Infit MnSq) |
|---|---|---|---|
| 1 | Itchiness, soreness, pain, or stinging | 0.9 | 1.10 |
| 2 | Embarrassment/self-consciousness | −0.5 | 0.94 |
| 3 | Interferes with shopping/looking after home/garden | −1.2 | 0.84 |
| 4 | Influence choice of clothing | 0.3 | 1.03 |
| 5 | Affects social/leisure activities | −0.5 | 0.93 |
| 6 | Affects ability to play sports | −0.5 | 0.93 |
| 7 | Prevents working/studying | −1.8 | 0.79 |
| 8 | Creates problems with partner/close friends/relatives | 0.4 | 1.05 |
| 9b | Causes sexual difficulties | 3.4 | 1.47 |
| 10 | Problems with treatment | 0.1 | 1.01 |
a The lowest/highest value indicates that the corresponding item is assessing the mildest/most severe impairment
b This item showed critical misfit according to the Rasch model and had to be removed during the analysis