RT Journal Article SR Electronic T1 RESULTS OF TREATMENT AND TERMINATION OF THE DIET IN PHENYLKETONURIA (PKU) JF Pediatrics JO Pediatrics FD American Academy of Pediatrics SP 881 OP 890 VO 46 IS 6 A1 Kang, Ellen Song A1 Sollee, Natalie D. A1 Gerald, Park S. YR 1970 UL http://pediatrics.aappublications.org/content/46/6/881.abstract AB The mean I.Q. of 27 PKU patients at the mean age of 3 years 10 months treated before 3 weeks of age was comparable to that of their unaffected siblings. The mean I.Q., of 12 patients at the mean age of 5 years 6 months treated between 3 and 6 weeks of age fell significantly below the mean I.Q. of their unaffected siblings. Seventeen patients treated after 8 months of age did not differ in their mean I.Q. at the end of treatment from 11 untreated patients, despite the observation that more than half of the late-treated patients achieved significant gains during the course of their treatment. Patients off dietary therapy did not appear to deteriorate over a follow-up duration of 2 to 3½ years. Eleven were followed for 6 years without evidence of deterioration. Thirteen atypical PKU's showed normal intellectual development. An unexplained predominance of males was observed in our group of atypical PKU patients.