Skip to main content

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  
  1. ‡ interval of possible values
  2. * % of children with score = 0
  3. † % of children with maximum score