|
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
|
- Note: Total N = 13,724 for reliability, Total N = 13,004 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 < .001 (independent samples t-test).
