Table 3 Internal Consistency
Scale and items | N | Items | Item-Total correlation | Mean Inter-Item correlation | Cronbach’s alpha |
|---|---|---|---|---|---|
General Health Status Includes items 01, 02, 03, 04, 05 and 10 | 186 | 6 | 0.59–0.81 | 0.60 | 0.90 |
Lung Includes items 12, 13, 14, 15 and 16 | 189 | 5 | 0.65–0.78 | 0.64 | 0.90 |
Medication Includes items 17, 18 and 19 | 172 | 3 | 0.58–0.77 | 0.62 | 0.82 |
Skin Includes items 20, 21 and 22 | 192 | 3 | 0.67–0.73 | 0.63 | 0.83 |
Eyes Includes items 23, 24, 25, 26, 27, 28 and 29 | 187 | 7 | 0.68–0.79 | 0.59 | 0.91 |