Table 3 Reliability of the German CFQ-R, Child and Parent versions

Dimensions of Health-Related Quality of Life

No. of items

Internal consistency

(Cronbach's α)

(n = 136)

Test-retest reliability

(ICC)

(n = 20)

95% Confidence Intervall for ICC

No. of items

Internal consistency (Cronbach's α)

(n = 136)

Test-retest reliability (ICC)

(n = 20)

95% Confidence Intervall for ICC

Physical Functioning

6

0.77

0.80

0.57-0.92

9

0.89

0.87

0.71-0.95

Energy

-

-

-

5

0.69

0.90

0.76-0.96

Emotional State

8

0.69

0.74

0.47-0.89

5

0.66

0.86

0.69-0.94

Social Limitations

7

0.23

0.65

0.31-0.85

-

-

-

School Performance

-

-

-

3

0.73

0.61

0.23-0.83

Body Image

3

0.57

0.83

0.63-0.93

3

0.82

0.94

0.85-0.98

Eating Disturbance

3

0.69

0.70

0.39-0.87

2

0.86

0.91

0.79-0.96

Treatment Burden

3

0.24

0.61

0.24-0.83

3

0.72

0.89

0.74-0.95

Subjective Health Perception

-

-

-

3

0.71

0.83

0.62-0.93

Respiratory Symptoms

4

0.64

0.83

0.63-0.93

6

0.83

0.89

0.75-0.96

Digestive Symptoms

1

-

0.50

0.09-0.76

3

0.69

0.83

0.63-0.93

Weight Problems

-

-

-

1

-

0.68

0.35-0.86