Fig. 3
From: Association of different iron deficiency cutoffs with adverse outcomes in chronic kidney disease
Associations of TSAT and ferritin as continuous variables on all-cause mortality in chronic kidney disease patients. Data were fit by a Cox proportional hazard regression model based on restricted cubic splines. Knots were placed on at 10th, 50th, and 90th percentile of ferritin and TSAT, respectively. Panel a shows the association between ferritin, adjusted for age and sex, and all-cause mortality. Panel b shows the association between TSAT, adjusted for age and sex, and all-cause mortality. The black line represents the hazard ratio. The grey area the 95% confidence interval