Relative risks (RRs) for death associated with expression of single genes. Findings are stratified by tamoxifen treatment and ER status. The position of each symbol indicates the RR. The length of the horizontal line through the symbol indicates the 95% CI. The blue boxes indicate the RRs and 95% CIs for ER-positive patients treated with tamoxifen, the green pyramids indicate the RRs and 95% CIs for ER-positive patients not treated with tamoxifen, and the red downward pointing triangles indicate the RRs and 95% CIs for ER-negative patients not treated with tamoxifen. CI, confidence interval; ER, estrogen receptor; RR, relative risk.