Table 6

"Child"-Scales – Scale statistics and reliability
Interaction Information Decision making
"Chld-Scales"
Number of items 7 3 4
Responders (n) 957 816 503
Missing values (%) 2.2 16.6 48.6
Subscale minimum/maximum 0/21 0/9 0/12
Subscale mean, raw 18.3 7.8 8.0
Subscales transformed (min/max) 0/100 0/100 0/100
Subscale mean, transformed 87.1 86.3 66.4
Floor effect (%) 0 0.1 3.0
Ceiling effect (%) 47.8 45.7 12.8
Skewness −1.18 −1.14 -.34
Inter-item correlation (min/max) 0.71 (0.65 - 0.83) 0.81 (0.78 – 0.84) 0.8 (0.74 – 0.84)
Cronbach‘s alpha 0.95 0.93 0.94

Bitzer et al.

Bitzer et al. BMC Health Services Research 2012 12:347   doi:10.1186/1472-6963-12-347

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