|
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
|
1,288
|
0.78
|
84.03
|
19.78
|
0.0
|
34.5
|
88.55
|
16.08
|
0.2
|
46.5
|
4.52**
|
0.28
|
|
3 yrs
|
1,240
|
0.74
|
81.08
|
19.89
|
0.0
|
28.3
|
88.89
|
14.13
|
0.1
|
42.3
|
7.81***
|
0.55
|
|
4 yrs
|
1,182
|
0.78
|
79.76
|
20.61
|
0.5
|
27.2
|
87.75
|
16.65
|
0.2
|
44.7
|
7.99***
|
0.48
|
|
5 yrs
|
974
|
0.77
|
74.28
|
21.33
|
0.0
|
19.8
|
81.03
|
20.23
|
0.3
|
32.2
|
6.75***
|
0.33
|
|
6 yrs
|
1,120
|
0.76
|
74.87
|
21.68
|
0.0
|
19.8
|
80.58
|
20.42
|
0.1
|
28.8
|
5.71***
|
0.28
|
|
7 yrs
|
1,083
|
0.78
|
72.73
|
22.49
|
0.0
|
16.0
|
78.99
|
21.30
|
0.1
|
29.7
|
6.26***
|
0.29
|
|
8 yrs
|
1,026
|
0.77
|
77.05
|
20.72
|
0.0
|
23.3
|
80.70
|
20.93
|
0.3
|
34.3
|
3.65*
|
0.17
|
|
9 yrs
|
968
|
0.79
|
72.58
|
22.44
|
0.4
|
15.5
|
78.13
|
23.03
|
0.5
|
31.8
|
5.55**
|
0.24
|
|
10 yrs
|
979
|
0.80
|
73.14
|
23.69
|
0.3
|
19.7
|
81.41
|
20.68
|
0.0
|
33.5
|
8.27***
|
0.40
|
|
11 yrs
|
779
|
0.78
|
76.19
|
21.27
|
0.7
|
19.9
|
82.98
|
20.07
|
0.2
|
37.3
|
6.79***
|
0.34
|
|
12 yrs
|
768
|
0.80
|
72.09
|
22.68
|
0.0
|
19.9
|
83.03
|
19.63
|
0.0
|
36.9
|
10.94***
|
0.56
|
|
13 yrs
|
699
|
0.82
|
77.14
|
23.19
|
0.3
|
25.4
|
81.39
|
20.95
|
0.3
|
38.9
|
4.25*
|
0.20
|
|
14 yrs
|
646
|
0.82
|
73.43
|
23.41
|
0.4
|
21.4
|
85.32
|
19.03
|
0.0
|
46.0
|
11.89***
|
0.62
|
|
15 yrs
|
623
|
0.81
|
76.82
|
22.46
|
0.4
|
25.7
|
83.33
|
19.50
|
0.3
|
42.4
|
6.51***
|
0.33
|
|
16 yrs
|
361
|
0.81
|
75.01
|
23.59
|
1.0
|
21.7
|
85.40
|
17.91
|
0.0
|
42.4
|
10.39***
|
0.58
|
- Note: Total N = 13,736 for reliability, Total N = 12,991 for validity.
- Higher values equal better health-related quality of life.
- % Floor/Ceiling = the percentage of scores at the extremes of the scaling range.
- Effect sizes are designated as small (.20), medium (.50), and large (.80).
- *p < .05, **p < .01, ***p < .001 (independent samples t-test).
