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. 2011 Dec 31;7:51. doi: 10.1186/1744-9081-7-51

Table 3.

Allele Association of COMT SNP rs4680

Sample Allele frequency χ2 p-value* Odds Ratio 95% CI
G A
Controls 194 244
Nicotine dependence 126 154 0.035 0.852 1.03 0.76-1.39
Opiate dependence 110 112 1.639 0.200 1.24 0.89-1.71
Alcohol dependence 231 223 3.880 0.049 1.30 1.00-1.69

* p-value determined by Pearson's chi-squared test (DF = 1)