Figure 1From: Anemia and iron deficiency in COPD patients: prevalence and the effects of correction of the anemia with erythropoiesis stimulating agents and intravenous iron Correlation between anemia parameters and the Visual Analog Scale (VAS) score in 12 COPD patients treated with ESAs and intravenous iron. A. Correlation between the delta hemoglobin (Hb) and delta VAS. B. Correlation between the delta hematocrit (Hct) and delta VAS.Back to article page