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. 1997 Apr 29;94(9):4572–4575. doi: 10.1073/pnas.94.9.4572

Table 5.

Chi-square test of homogeneity in allele distributions at comt gene

Source χ2 df 2P
Disease 7.84 1 0.0052
Sex 5.03 1 0.0250
D × S 5.89 1 0.0152
Total 18.76 3 0.0003

Males, χ2 = 13.68, 2P = 0.0002; females, χ2 = 0.01, 2P = 0.9097.