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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

(χ2 = 2.85; p = 0.091)

Smokers/Non-smokers

7/12

17/21

(χ2 = 0.32; p = 0.569)

Mean age (years)/SD

31.6/11.0

37.2/10.9

(t = 1.80; p = 0.077)