Fig. 2
From: Prognostic impact of hypochromic erythrocytes in patients with pulmonary arterial hypertension
Survival and TTCW according to low hemoglobin levels. Low hemoglobin levels (red) were associated with shorter time to clincial worsening (TTCW, left) and showed a trend to predict survival at baseline (center) but not after 1-year follow-up in the univariable analysis (right). Green lines represent patients with normal hemoglobin (Hg) values, which corresponds to ≥ 12 g/dl in women and ≥ 13 g/dl in men