Background
Material and methods
Participants and instrument
Statistical analysis
CTT analysis
IRT analysis
Results
CTT analysis
Convergent validity | Discriminant validity | |||||||
---|---|---|---|---|---|---|---|---|
No. items
|
n
|
Mean ± SD
|
α
|
Range of correlation
|
Scaling success (percent)
|
Range of correlation
|
Scaling success (percent)
| |
Child self-report
| ||||||||
Total score | 23 | 938 | 77.18 ± 13.38* | 0.85 | - | - | - | - |
Physical health | 8 | 938 | 78.32 ± 15.43* | 0.70 | 0.31-0.67 | 87 (7/8) | 0.10-0.42 | 96 (23/24) |
Emotional functioning | 5 | 938 | 68.46 ± 21.32 | 0.70 | 0.58-0.73 | 100 (5/5) | 0.21-0.37 | 100 (15/15) |
Social functioning | 5 | 938 | 85.06 ± 17.07* | 0.74 | 0.64-0.68 | 100 (5/5) | 0.19-0.42 | 100 (15/15) |
School functioning | 5 | 938 | 76.22 ± 18.78* | 0.69 | 0.59-0.71 | 100 (5/5) | 0.14-0.35 | 100 (15/15) |
Parent proxy-report
| ||||||||
Total score | 23 | 938 | 73.49 ± 16.65* | 0.89 | - | - | - | - |
Physical health | 8 | 938 | 72.48 ± 20.79* | 0.81 | 0.52-0.72 | 100 (8/8) | 0.25-0.46 | 100 (24/24) |
Emotional functioning | 5 | 938 | 68.62 ± 21.85 | 0.74 | 0.63-0.77 | 100 (5/5) | 0.25-0.38 | 100 (15/15) |
Social functioning | 5 | 938 | 80.03 ± 21.68* | 0.79 | 0.66-0.77 | 100 (5/5) | 0.26-0.50 | 100 (15/15) |
School functioning | 5 | 938 | 73.47 ± 20.69* | 0.70 | 0.55-0.79 | 100 (5/5) | 0.15-0.45 | 100 (15/15) |
CCFA
chi-square | d.f | RMSEA | NNFI | RMR | CFI | |
---|---|---|---|---|---|---|
Child self-report
| ||||||
Physical health | 187.98 | 20 | 0.091 | 0.94 | 0.077 | 0.96 |
Emotional functioning | 3.49 | 5 | 0.000 | 1.00 | 0.013 | 1.00 |
Social functioning | 40.73 | 5 | 0.085 | 0.98 | 0.046 | 0.99 |
School functioning | 138.82 | 5 | 0.230 | 0.77 | 0.120 | 0.88 |
Parent proxy-report
| ||||||
Physical health | 272.16 | 20 | 0.140 | 0.93 | 0.091 | 0.97 |
Emotional functioning | 12.48 | 5 | 0.042 | 1.00 | 0.026 | 1.00 |
Social functioning | 37.08 | 5 | 0.090 | 0.99 | 0.039 | 0.99 |
School functioning | 143.54 | 5 | 0.240 | 0.79 | 0.120 | 0.90 |
IRT analysis
Child self-report | Parent proxy-report | |||
---|---|---|---|---|
person
|
item
|
person
|
item
| |
Physical health | ||||
Reliability | 0.54 | 0.99 | 0.61 | 0.95 |
Separation | 1.07 | 11.93 | 1.25 | 4.53 |
Emotional functioning | ||||
Reliability | 0.62 | 0.99 | 0.63 | 0.99 |
Separation | 1.28 | 9.49 | 1.30 | 8.21 |
Social functioning | ||||
Reliability | 0.23 | 0.87 | 0.40 | 0.94 |
Separation | 0.55 | 2.54 | 0.82 | 4.14 |
School functioning | ||||
Reliability | 0.52 | 0.98 | 0.56 | 0.99 |
Separation | 1.05 | 6.93 | 1.12 | 11.15 |
Item statistics
Scale | Child self-report | Parent proxy-report | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Category frequency (%)
|
Category frequency (%)
| |||||||||||||||
difficulty
|
infit
|
outfit
|
0
|
1
|
2
|
3
|
4
|
difficulty
|
infit
|
outfit
|
0
|
1
|
2
|
3
|
4
| |
Physical health
| ||||||||||||||||
1. Hard to walk more than a block | -0.23 | 1.07 | 0.98 | 2 | 4 | 14 | 12 | 67 | -0.18 | 0.83 | 0.78 | 7 | 6 | 15 | 14 | 55 |
2. Hard to run | 0.18 | 0.76 | 0.76 | 3 | 7 | 21 | 18 | 51 | 0.13 | 0.82 | 0.82 | 7 | 11 | 20 | 18 | 44 |
3. Hard to do sports or exercises | -0.18 | 0.86 | 0.75 | 3 | 5 | 12 | 16 | 64 | -0.03 | 0.80 | 0.77 | 7 | 7 | 18 | 17 | 51 |
4. Hard to lift something heavy | 0.71 | 0.99 | 1.03 | 8 | 11 | 29 | 21 | 31 | 0.23 | 0.99 | 1.04 | 7 | 9 | 26 | 22 | 36 |
5. Hard to take a bath or shower | -1.01 | 2.01 | 1.63 | 4 | 1 | 2 | 3 | 90 | -0.04 | 1.60 | 1.32 | 20 | 2 | 6 | 5 | 67 |
6. Hard to do chores around house | 0.40 | 1.26 | 1.22 | 8 | 7 | 20 | 20 | 45 | 0.20 | 1.00 | 1.01 | 9 | 10 | 20 | 20 | 41 |
7. Hurt or ache | 0.13 | 0.95 | 0.95 | 3 | 4 | 23 | 21 | 50 | -0.09 | 0.94 | 1.06 | 3 | 7 | 23 | 19 | 48 |
8. Low energy | -0.01 | 0.92 | 0.86 | 2 | 6 | 15 | 21 | 56 | -0.21 | 1.11 | 1.11 | 2 | 8 | 17 | 20 | 52 |
Emotional functioning
| ||||||||||||||||
1. Feel afraid or scared | -0.30 | 1.01 | 1.0 | 4 | 4 | 25 | 23 | 44 | -0.37 | 1.05 | 1.06 | 3 | 5 | 22 | 23 | 47 |
2. Feel sad or blue | -0.16 | 0.79 | 0.8 | 5 | 6 | 26 | 23 | 41 | -0.14 | 0.71 | 0.72 | 4 | 7 | 25 | 24 | 40 |
3. Feel angry | 0.29 | 0.78 | 0.78 | 8 | 12 | 29 | 22 | 28 | 0.37 | 0.84 | 0.86 | 7 | 15 | 29 | 21 | 29 |
4. Trouble sleeping | -0.34 | 1.34 | 1.24 | 9 | 7 | 12 | 17 | 55 | -0.23 | 1.26 | 1.21 | 8 | 7 | 17 | 18 | 51 |
5. Worry about what will happen | 0.52 | 1.16 | 1.15 | 17 | 12 | 25 | 16 | 30 | 0.38 | 1.19 | 1.14 | 12 | 13 | 22 | 17 | 35 |
Social functioning
| ||||||||||||||||
1. Trouble getting along with peers | 0.16 | 1.11 | 1.06 | 3 | 4 | 11 | 20 | 62 | 0.36 | 1.1 | 1.06 | 8 | 5 | 14 | 18 | 53 |
2. Other kids not wanting to be friends | -0.20 | 0.87 | 0.8 | 2 | 3 | 9 | 17 | 70 | -0.14 | 0.84 | 0.79 | 4 | 5 | 8 | 19 | 63 |
3. Teased | 0.11 | 1.06 | 1.04 | 2 | 3 | 15 | 17 | 63 | -0.04 | 1.1 | 1.09 | 4 | 5 | 12 | 20 | 59 |
4. Doing things other peers do | 0.01 | 0.97 | 0.9 | 3 | 3 | 11 | 17 | 66 | -0.09 | 0.88 | 0.87 | 5 | 3 | 12 | 18 | 62 |
5. Hard to keep up when play with others | -0.08 | 1.03 | 1.0 | 2 | 3 | 12 | 16 | 67 | -0.09 | 1.11 | 1.08 | 4 | 5 | 12 | 19 | 61 |
School functioning
| ||||||||||||||||
1. Hard to concentrate | 0.16 | 0.98 | 0.95 | 5 | 7 | 22 | 23 | 43 | 0.33 | 0.97 | 0.93 | 10 | 9 | 20 | 22 | 38 |
2. Forget things | 0.32 | 0.91 | 0.92 | 4 | 7 | 28 | 28 | 33 | 0.24 | 0.97 | 1.01 | 5 | 9 | 26 | 26 | 35 |
3. Trouble keeping up with schoolwork | 0.18 | 0.95 | 0.9 | 7 | 7 | 20 | 23 | 44 | 0.43 | 0.94 | 0.9 | 13 | 10 | 20 | 17 | 40 |
4. Miss school - not well | -0.39 | 1.08 | 1.03 | 3 | 4 | 14 | 19 | 60 | -0.68 | 1.12 | 1.02 | 4 | 3 | 9 | 18 | 66 |
5. Miss school - doctor appointment | -0.27 | 1.19 | 1.15 | 4 | 5 | 16 | 18 | 58 | -0.32 | 1.07 | 1.15 | 5 | 3 | 16 | 19 | 57 |
Rating scale diagnostics
Child self-report | Parent proxy-report | |||||||
---|---|---|---|---|---|---|---|---|
Average measure
|
Infit MNSQ
|
Outfit MNSQ
|
Step measure
|
Average measure
|
Infit MNSQ
|
Outfit MNSQ
|
Step measure
| |
Physical health | ||||||||
0 | 0.04 | 1.25 | 1.61 | None | -0.17 | 1.05 | 1.06 | None |
1 | 0.24 | 1.02 | 1.01 | -0.25 | 0.07 | 0.99 | 0.98 | -0.05 |
2 | 0.54 | 0.91 | 0.82 | -0.72 | 0.36 | 0.96 | 0.87 | -0.67 |
3 | 0.91 | 0.98 | 0.84 | 0.81 | 0.75 | 0.97 | 1.01 | 0.67 |
4 | 1.52 | 0.99 | 1.00 | 0.16 | 1.15 | 1.02 | 1.02 | 0.10 |
Emotional functioning | ||||||||
0 | -0.51 | 1.05 | 1.05 | None | -0.47 | 1.20 | 1.29 | None |
1 | -0.12 | 0.86 | 0.79 | -0.34 | -0.24 | 0.80 | 0.77 | -0.70 |
2 | 0.33 | 0.98 | 0.95 | -0.94 | 0.33 | 0.94 | 0.89 | -0.79 |
3 | 0.82 | 0.85 | 0.91 | 0.70 | 0.91 | 0.77 | 0.86 | 0.70 |
4 | 1.24 | 1.10 | 1.10 | 0.58 | 1.38 | 1.10 | 1.08 | 0.79 |
Social functioning | ||||||||
0 | -0.13 | 1.11 | 1.11 | None | -0.36 | 1.10 | 1.12 | None |
1 | 0.13 | 0.89 | 0.82 | -0.30 | -0.13 | 0.76 | 0.65 | -0.23 |
2 | 0.59 | 0.91 | 0.77 | -0.82 | 0.40 | 0.94 | 0.84 | -0.68 |
3 | 1.17 | 1.00 | 1.12 | 0.43 | 1.00 | 0.85 | 1.01 | 0.20 |
4 | 1.57 | 1.07 | 1.04 | 0.68 | 1.46 | 1.16 | 1.11 | 0.71 |
School functioning | ||||||||
0 | -0.24 | 1.14 | 1.17 | None | -0.31 | 1.16 | 1.22 | None |
1 | 0.06 | 0.98 | 0.94 | -0.44 | -0.14 | 0.78 | 0.70 | -0.22 |
2 | 0.44 | 0.91 | 0.87 | -0.91 | 0.31 | 0.99 | 0.99 | -0.83 |
3 | 0.99 | 0.96 | 1.00 | 0.61 | 0.86 | 0.90 | 1.00 | 0.45 |
4 | 1.45 | 1.02 | 1.02 | 0.74 | 1.36 | 1.00 | 1.00 | 0.60 |