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Table 1 Comparison of neuropsychological test scores for each genotype and results of ANOVA

From: No evidence of association between Catechol-O-Methyltransferase (COMT) Val 158 Met genotype and performance on neuropsychological tasks in children with ADHD: A case-control study

  

COMT Genotype

  
  

Met/Met

Met/Val

Val/Val

ANOVA

  

Mean (SD)

N

Mean (SD)

N

Mean (SD)

N

F

P

Working Memory Freedom from distractability Score

16.65 (4.60)

23

16.51 (4.58)

70

16.55 (5.76)

31

0.007

0.993

MFFT

Mean Reaction Time of Incorrect

607.89 (441.08)

24

659.81 (628.27)

61

661.02 (508.34)

29

0.081

0.922

 

Mean Reaction Time of Corrrect

670.17 (498.93)

24

690.30 (669.07)

61

719.86 (578.75)

29

0.045

0.956

 

No. of Incorrect

40.29 (38.52)

24

50.57 (42.16)

61

40.28 (40.22)

29

0.896

0.411

CPT

Comission errors

41.92 (43.65)

24

51.15 (42.52)

61

46.41 (40.81)

29

0.437

0.647

 

Omission errors

28.50 (41.74)

24

44.34 (47.57)

61

31.62 (42.54)

29

1.42

0.246

Stop Task

% Inhibition

73.45 (25.78)

24

81.95 (23.92)

61

69.32 (32.51)

29

2.456

0.09

 

Mean Reaction time (ms)

383.13 (239.67)

24

325.13 (252.60)

61

341.05 (240.64)

29

0.475

0.623

Go No Go Task

% Inhibition

72.86 (24.28)

24

79.61 (22.99)

61

68.52 (29.61)

29

2.075

0.13

 

Mean Reaction Time

316.40 (183.10)

24

258.66 (174.35)

61

276.66 (166.51)

29

0.946

0.391