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. Author manuscript; available in PMC: 2017 Mar 1.
Published in final edited form as: Behav Genet. 2015 Sep 21;46(2):151–169. doi: 10.1007/s10519-015-9737-3

Figure 2.

Figure 2

Forest plot of general substance dependence and rs1799971 across studies that had at least 5 cases and 5 controls. Summary odds ratio, 95% Confidence Interval, and p-values are based on fixed effect meta-analysis. *indicates the subset of 10 studies that had all five specific substance dependence diagnoses, examined in secondary analyses to confirm consistency of results. Estimated heterogeneity variance was Q = 20.13 with a p-value of 0.387 among all 20 studies and Q = 6.49 with a p-value of 0.69 among the subset of 10 studies.