We re-ran our GxE models using a square root transformed and a logarithmic transformed alcohol use frequency variable in order to examine the robustness of the results that emerged using the raw alcohol variable. The square root transformed variable and the logarithmic transformed variable were highly correlated, r(4707) = .99, p <0.01. The results were consistent between the two transformations and only the results from the square root transformed variable are presented here.
