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Appendix B

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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 7. Adult Test Scores for PKUCS Subjects Grouped by Age at Diet Discontinuation (Values tabulated are mean ± s.d.)

* Change from 12-year WISC-R or WRAT score

** p-values are for illustration only, due to small sample sizes

- WAIS-R - - WRAT 3 -
n Verbal Perform Full n Reading Spelling Arithmetic
Diet Discontinued Before 6.5 yrs.
   Parent IQ 31 106±11
   Adult Score 33 91±11 96±14 92±13 31 95±12 95±14 93±15
   Change* 26 -2 +1 -1 24 -1 +4 +10
   p** 0.33 0.76 0.54 0.59 0.08 0.0001
Diet Discontinued 6.5 - 12.5 years
   Parent IQ 12 110±7
   Adult Score 13 93±15 98±22 95±19 12 97±17 97±16 90±16
   Change* 10 -1 -2 -2 9 0 +1 +10
   p** 0.59 0.60 0.50 0.86 0.66 0.02
Diet Discontinued 12.5 - 20 yrs.
   Parent IQ 11 107±16
   Adult Score 11 97±14 102±17 99±16 7 96±24 97±24 93±23
   Change* 9 +4 +3 +3 5 -5 -3 +10
   p** 0.28 0.39 0.44 0.07 0.54 0.004
Never Off Diet
   Parent IQ 7 111±7
   Adult Score 7 108±11 103±17 108±9 7 107±6 109±5 98±6
   Change* 6 +10 +2 +8 6 0 +6 +16
   p** 0.03 0.26 0.03 1.00 0.19 0.001

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