Correlation of serum and urine ferritin with hematocrit (Hct) and hemoglobin (Hgb). Serum and urine ferritin levels measured by ELISA were correlated with Hct and Hgb. Serum ferritin correlated negatively with Hct (R = -0.42, P = 0.012) and Hgb (R = -0.47, P = 0.006). Urine ferritin levels also correlated negatively with Hct (R = -0.37, P = 0.028) and Hgb (R = -0.25, P = 0.110), although the correlation with Hgb was comparatively weaker.
Vanarsa et al. Arthritis Research & Therapy 2012 14:R182 doi:10.1186/ar4012