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. Author manuscript; available in PMC: 2014 May 12.
Published in final edited form as: Alcohol Clin Exp Res. 2009 Sep 17;33(12):2103–2112. doi: 10.1111/j.1530-0277.2009.01050.x

Fig. 2.

Fig. 2

Interaction between OPRM1 and education by GMDR analysis. Dark gray and light gray boxes correspond to the high- and low-risk factor combinations, respectively. The left and right bars within each box correspond to cases and controls, respectively. The top number is the sum of scores for the corresponding group of individuals (cases or controls with particular factor combination). The heights of the bars are proportional to the sum of scores in each group. For education, 0 means ≤12 years, and 1 means >12 years. For OPRM1, 0 means A/A, and 1 means A/G&G/G.