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Figure 3 :Posterior odds that a result is true, assuming risk alleles with a frequency of 10% and a genotype relative risk (GRR) of 1.2 and a multiplicative model This figure indicates the posterior odds that a result is true (plotted on a log scale on the yaxis) against the signifi cance of the result (plotted as the negative log of the Pvalue on the xaxis). Five sample sizes are listed in the legend; in each, the number of cases and controls are equal. The 200 line thus indicates the posterior odds for a study involving 200 cases and 200 controls, and so on. Power was calculated using the online genetic power calculator.[92] Reprinted from Brain, Vol. 131, 311831, Copyright (2008), with permission from Oxford University Press.[63] 
