Table 4 Psychometric properties of AUQUEI - internal reliability analysis: floor effect, ceiling effect, item-total correlation, Cronbach's Alpha and item-deleted Alpha
From: Quality of life evaluation of children with sleep bruxism
Domains | Mean (± SD) | Floor effect* | Ceiling effect† | Item-total correlation r (p-value) | Alpha if item deleted | ||
|---|---|---|---|---|---|---|---|
n | % | n | % | ||||
Function (0-15)‡ | 9.38 (2.18) | 0 | 0.00 | 0 | 0.00 | 0.70 (< 0.0001) | 0.58 |
Family (0-15)‡ | 10.56 (2.53) | 0 | 0.00 | 4 | 4.26 | 0.72 (< 0.0001) | 0.56 |
Leisure (0-9)‡ | 8.06 (1.12) | 0 | 0.00 | 41 | 43.62 | 0.50 (< 0.0001) | 0.63 |
Autonomy (0-15)‡ | 8.37 (2.57) | 0 | 0.00 | 0 | 0.00 | 0.66 (< 0.0001) | 0.59 |
Total scale (0-78)‡ | 53.69 (7.15) | 0 | 0.00 | 0 | 0.00 | Cronbach's Alpha = 0.65 | |