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Table 2 Allele and genotype frequency.

From: The COMT Val158 Met polymorphism as an associated risk factor for Alzheimer disease and mild cognitive impairment in APOE 4 carriers

COMT   MCIa (n = 223) ADb (n = 345) Controls (n = 253)
Allele A 0.520 0.470 0.512
  G 0.480 0.530 0.488
Genotype AA 0.278 0.214 0.265
  AG 0.484 0.510 0.494
  GG 0.238 0.275 0.241
H-Wa p-Value 0.69 0.75 0.90
APOE   MCIa (n = 223) ADb (n = 345) Controls (n = 253)
Allele 2 0.027 0.035 0.059
  3 0.731 0.664 0.838
  4 0.242 0.301 0.103
Genotype 2.2 0.000 0.000 0.008
  2.3 0.045 0.052 0.095
  2.4 0.009 0.017 0.008
  3.3 0.561 0.432 0.692
  3.4 0.296 0.412 0.198
  4.4 0.090 0.087 0.000
H-Wc p-value 0.07 0.85 0.11
  1. aMCI: mild cognitive impairment. bAD: Alzheimer's disease. cHardy-Weinberg probability test.