For the combined meta-analysis of the two alcohol consumption phenotypes across the 4 race/ethnicity groups, fixed effects and random effects summary estimates were calculated for an additive model using R package “meta”. Heterogeneity index, I2 (0–100%) as well as P-value for Cochrane’s Q statistic were assessed among groups. We report fixed effects results, except when there was significant heterogeneity between race/ethnicity groups, in which case we report values for a random effects model.
