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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