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. Author manuscript; available in PMC: 2019 Sep 9.
Published in final edited form as: Am J Med Genet B Neuropsychiatr Genet. 2016 Sep 13;171(8):1112–1115. doi: 10.1002/ajmg.b.32492

Table II. COMT Genotype Versus IQ.

Met-hemizygous Val-hemizygous Analysis



Measure n Mean SD N Mean SD P
Full-scale IQ 78 79.17 12.03 81 75.99 12.81 0.116
Verbal IQ 48 81.13 12.45 58 79.91 14.40 0.692
Performance IQ 48 76.71 12.84 58 73.86 11.62 0.265
Verbal comprehension index 68 85.10 11.79 65 83.69 12.79 0.484
Perceptual reasoning index 68 79.34 13.13 65 76.12 13.59 0.188
Working memory index 66 84.23 13.96 65 81.60 14.32 0.262
Processing speed index 61 86.72 15.36 63 82.08 14.40 0.081