Survival according to Hgb parameters. (A) Kaplan-Meier survival function for all-cause mortality according to quartile of Hgb-Var. (B) Kaplan-Meier survival function for all-cause mortality according to mean Hgb level (≤11, 11–12, 12–13, >13 g/dl). The number (%) of patients with mean Hgb ≤ 11 was 829 (12.5%), mean Hgb 11 to 12 was 2198 (33.1%), mean Hgb 12 to 13 was 2752 (41.4%), and mean Hgb >13 was 865 (13.0%). (C) Kaplan-Meier survival function for all-cause mortality for subjects with Hgb slope ≤0, 0 to 0.5 g/dl per month, 0.5 to 1 g/dl per month, and >1 g/dl per month. The number (%) of patients with Hgb slope ≤ 0 was 1248 (18.8%), Hgb slope 0 to 0.5 was 2936 (44.2%), Hgb slope 0.5 to 1 was 1984 (29.9%), and Hgb slope >1 was 476 (7.2%).