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Table 3 Demographic data

From: The val158met polymorphism of human catechol-O-methyltransferase (COMT) affects anterior cingulate cortex activation in response to painful laser stimulation

  COMT Genotype group Statistical significance of group differences
  met/met
N = 19
val carriers
N = 38
 
Males/females 12/7 15/23 2 = 2.85; p = 0.091)
Smokers/Non-smokers 7/12 17/21 2 = 0.32; p = 0.569)
Mean age (years)/SD 31.6/11.0 37.2/10.9 (t = 1.80; p = 0.077)