Association between catechol-O-methyltransferase and phobic anxiety.

OBJECTIVE

The authors assessed the association between the catechol-O-methyltransferase (COMT) Val158Met polymorphism and scores on the phobic anxiety scale of the Crown-Crisp Experimental Index.

METHOD: A total of 1,234 women completed the Crown-Crisp Experimental Index phobic anxiety scale and were genotyped for the COMT polymorphism. The authors used unconditional logistic regression to compute odds ratios and 95% confidence intervals (CIs) to evaluate the association between the COMT genotype and phobic anxiety.

RESULTS

The mean scores for the three genotypes were statistically significantly different. Compared to the COMT Met/Met genotype, the age-adjusted odds ratio for scoring >/=6 compared to scoring 0 or 1 were 1.15 (95% CI=0.71-1.85) and 1.99 (95% CI=1.17-3.40) for the COMT Val/Met and COMT Val/Val genotypes, respectively; a significant gene dosage effect was observed.

CONCLUSIONS

Our results suggest that the functional COMT polymorphism is associated with the development of phobic anxiety.