Appendix B

The content in this publication was current at the time it was published, but it is not being updated. The publication is provided for historical purposes only.

Table 6. Relationship of Phenylalanine Hydroxylase Mutation to their Adult WAIS-R Intelligence Quotient Regardless of Parental IQ, Age of Diagnosis, and Treatment History

Mutation Severity IQ	Number	Median WAIS-R
Severe/Severe	31	95 (n=30)
Severe/Moderate	15	100
Severe/Mild	4	101
Severe/Unclassified	4	100
Moderate/Unclassified	1	80
In Process	11	89 (n=9)
Both Mutations Unclassified	1	116

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