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Table 2 PedsQL™ 4.0 Generic Core Scales Physical Health Summary Score: Parent Proxy-Report Reliability and Validity

From: Parent proxy-report of their children's health-related quality of life: an analysis of 13,878 parents' reliability and validity across age subgroups using the PedsQL™ 4.0 Generic Core Scales

Age

Reliability

Validity

   

Chronic Health Condition

Healthy Sample

  
 

N

α

Mean

SD

% Floor

% Ceiling

Mean

SD

% Floor

% Ceiling

Chronic vs. Healthy Difference

Chronic vs. Healthy Effect Size

2 yrs

1,290

0.87

77.68

24.25

1.0

24.4

90.04

15.07

0.2

38.9

12.36*

0.82

3 yrs

1,238

0.87

76.17

25.05

0.8

19.3

90.07

14.24

0.0

37.6

13.90*

0.98

4 yrs

1,184

0.89

76.01

24.91

1.8

19.8

89.23

17.00

0.0

42.6

13.22*

0.78

5 yrs

975

0.88

68.79

26.36

1.2

11.3

79.94

20.64

0.0

23.8

11.15*

0.54

6 yrs

1,119

0.87

73.31

23.87

0.4

14.0

80.37

20.76

0.0

21.9

7.06*

0.34

7 yrs

1,084

0.88

70.88

26.23

1.1

14.4

79.52

21.35

0.0

23.3

8.64*

0.40

8 yrs

1,025

0.88

74.25

23.98

0.6

15.0

82.91

19.93

0.0

31.1

8.66*

0.43

9 yrs

963

0.89

70.47

24.86

1.8

12.6

81.52

21.85

0.0

32.0

11.05*

0.51

10 yrs

973

0.88

72.13

24.29

0.9

14.1

84.18

19.11

0.2

32.1

12.05*

0.63

11 yrs

783

0.90

73.29

25.16

1.4

12.8

82.66

20.95

0.2

31.2

9.37*

0.45

12 yrs

765

0.89

69.33

25.30

0.4

8.5

82.36

20.86

0.0

27.6

13.03*

0.62

13 yrs

701

0.89

71.50

23.63

1.4

12.0

82.37

21.67

0.0

32.2

10.87*

0.50

14 yrs

646

0.90

69.70

24.99

0.7

8.6

84.52

19.86

0.0

31.3

14.82*

0.75

15 yrs

617

0.88

72.95

22.16

0.4

8.4

82.43

20.48

0.0

30.0

9.48*

0.46

16 yrs

361

0.89

69.01

25.74

0.5

9.6

85.61

18.07

0.0

31.5

16.60*

0.92

  1. Note: Total N = 13,724 for reliability, Total N = 13,004 for validity.
  2. Higher values equal better health-related quality of life.
  3. % Floor/Ceiling = the percentage of scores at the extremes of the scaling range.
  4. Effect sizes are designated as small (.20), medium (.50), and large (.80).
  5. *p < .001 (independent samples t-test).