Table 3. Neuropsychological testing results at baseline and follow-up.

Measure:	Baseline:	12-Month Follow-up:	24-Month Follow-up:
Wisconsin Card Sorting Test
Categories  Achieved	6/6*	6/6	6/6
Perseverative Errors	13	11	10
Total Errors	13	12	11
Stroop Word/Color Test
Word	6	10	9
Color	8	13	13
Color-Word	14	11	15
Verbal Fluency Test
Phonemic (FAS)	8	13	13
Categorical (Animals)	11	13	10
Paced Auditory Serial Addition Test Heaton Version
2.4 second	12	13	12
2.0 second	14	14	14
1.6 second	11	14	14
1.2 second	14	13	12
WAIS-III Digit Span
Score	14	13	15
Wechsler Memory Scale-III
Faces I	19	18	19
Faces II	18	18	19
Word List I	9	13	16
Word List II	10	12	16
Boston Naming Test
Score	15	16	16
Benton Judgment of Line Orientation Test
Score	12	15	15

^*Except where indicated otherwise, all test results are scaled scores, with M = 10 and SD = 3. An increase in scaled score of at least 4 to 5 points was used as the minimum in judging significant improvement between baseline and follow-up tests.