Table 10. Summary of Stepwise Regression for PKUCS Adult WAIS_R IQ Scores
(Possible predictors include: Age first treated, Parent IQ, Father's Education, Years on Diet, and Phe Levels at Diagnosis, 6 years, 10 years and Currently)
Dependent Variable VERBAL IQ
| Step |
Variable Entered |
Number In
|
Partial
R**2 |
Model
R**2 |
F to Enter |
Prob>F
|
| 1
|
Phe @ 10 yrs |
1
|
0.2494
|
0.2494
|
17.2819
|
0.0001
|
| 2
|
Parent IQ |
2
|
0.0904
|
0.3399
|
6.9853
|
0.0109
|
| 3
|
Age 1st Treated |
3
|
0.0315
|
0.3714
|
2.5089
|
0.1195
|
| 4
|
Adult Phe |
4
|
0.0379
|
0.4093
|
3.1405
|
0.0826
|
Dependent Variable PERFORMANCE IQ
| Step |
Variable Entered |
Number In |
Partial
R**2 |
Model
R**2 |
F to Enter |
Prob>F |
| 1
|
Father's Ed |
1
|
0.2031
|
0.2031
|
13.2542
|
0.0006
|
| 2
|
Age 1st Treated |
2
|
0.1064
|
0.3095
|
7.8563
|
0.0071 |
| 3
|
Adult Phe |
3
|
0.1182
|
0.4277
|
10.3281
|
0.0023
|
Dependent Variable WAIS-R FULL SCALE IQ
| Step |
Variable Entered |
Number In |
Partial
R**2 |
Model
R**2 |
F to Enter |
Prob>F |
| 1
|
Phe @ 10 yrs |
1
|
0.2438
|
0.2438
|
16.7616
|
0.0001
|
| 2
|
Parent IQ |
2
|
0.0909
|
0.3347
|
6.9713
|
0.0110
|
| 3
|
Age 1st Treated |
3
|
0.0415
|
0.3762
|
3.3290
|
0.0740
|
| 4
|
Adult Phe |
4
|
0.0732
|
0.4494
|
6.5103
|
0.0139
|
*Subset of Patients Who Discontinued by Age 8*
Dependent Variable WAIS-R FULL SCALE IQ
| Step
|
Variable Entered
|
Number In
|
Partial
R**2
|
Model R**2
|
F to Enter
|
Prob>F
|
| 1
|
Phe @ 10 yrs
|
1
|
0.2857
|
0.2857
|
12.7993
|
0.0011
|
| 2
|
Fatder's Ed
|
2
|
0.1405
|
0.4263
|
7.5939
|
0.0097
|
Back to Appendix B Figures and Tables
first |
previous |
next |
last