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Subgroup meta-regression analyses examining the association of total-study-period ESA dose (per epoetin alfa–equivalent 10,000-U/wk increment) with all-cause mortality. The incidence rate ratio (IRR) and 95% confidence interval (CI) is displayed on a logarithmic scale. Here, “erythropoietin” refers to epoetin (alfa or beta); “darbepoetin” refers to darbepoetin alfa.
