Table 4.
Loss of standard score points in relation to 100 μmol/L increase in SD Phe.
| Time Period | IQ | Matrix Reasoning | n-back # nonresponses | n-back # responses |
|---|---|---|---|---|
|
|
|
|
|
|
| Lifetime | 3.8 | 4.7 | 6.4 | 5.3 |
| < 5 yrs. | nc | 3.8 | 4.6 | 5.3 |
| 5.0 – 9.9 yrs. | nc | 4.2 | 8.9 | nc |
| ≥ 10 yrs. | 3.8 | 6.8 | 6.1 | nc |
Note: nc = analysis not conducted due to lack of significant correlation between cognitive performance and SD Phe in earlier analyses; Vocabulary and go/no-go are not included in the table because neither had significant correlations with SD Phe.