eTable 2 and eTable 3 show the results of another series of meta-analyses that test gene-environment correlation, gene-environment interaction, and whether stratification of those with and without depression by the environmental risk factor (stressful life events) would enhance the power to detect an association between the 5HTTLPR genotype and depression. We divided the samples of those with and without depression into strata defined by the number of stressful life events and examined the difference in the frequency of the S alleles between those with and without depression within each stressful life events stratum. eTable 3 presents these frequencies further stratified by sex.
