Adjusted hazard ratio of Heart Failure in the whole population sample (left) and in non-anemic participants (right) in function of ferritin – spline regression analysis (ARIC study, 1987 to 2011)
Adjusted for age, sex, and race. The black dashed lines represent the hazard ratios (HR) and the red line the 95%CI. Ferritin=121 ng/mL (median) was considered the reference for the whole population and Ferritin=127 ng/mL (median) for the non-anemic population (HR=1).