HRs (Y-axis) associated with use of metformin alone, combination of metformin with statins, and combination of metformin with finasteride (relative to no use of metformin, statins, nor finasteride) by race/ethnicity (X-axis) adjusting for covariates, propen... HRs (Y-axis) associated with use of metformin alone, combination of metformin with statins, and combination of metformin with finasteride (relative to no use of metformin, statins, nor finasteride) by race/ethnicity (X-axis) adjusting for covariates, propensity score of metformin use but without generalizability weights. Abbreviations: AA, African American; HISP, Hispanics; NHW, non Hispanic white. Chen-Pin Wang et al. Cancer Prev Res 2016;9:779-787 ©2016 by American Association for Cancer Research