Table 3:

Performance scores (mean (SD)) for the clinical tasks

	Untreated patients	Treated patients	Healthy controls	F(3,41)
Symbol coding
Symbol correctly coded	44.10(6.50)	43.08(8.92)	55.1(8.3)	6.55*
Forward digit span	5.36(.86)	5.92(1.15)	6.10(.84)	1.33
Backward digit span	3.78(.98)	3.04(1)	3.70(1.33)	1.48
Digit ordering Correct responses	90.90(12.60)	83.92(13.30)	87.32(9.83)	2.17
Stroop word color test Time to complete phase I(sec)	35.54(7.72)	32.52(2.89)	31(5.65)	1.92
Interference cost index	26.14(16.72)	20.10(6.80)	18.5(5.9)	1.33
Letter number sequencing task	20.26(9.52)	21.62(10.34)	15.47(4.66)	2.40
Alternation cost index Crossed tapping test errors	1.36(2.84)	2.53(2.78)	.68(1.36)	2.14

*P <.01