CD4 and isolated hyperferritinemia: Additionally, counts of CD3+ and CD4+ lymphocytes, as well as NK cells, were reduced in the hyperferritinemia group: CD4+ lymphocyte counts were 387.7 cells/μL (IQR 261.5-479.7 cells/μL) vs. 479.9 cells/μL (IQR 396.2-662.0 cells/μL), p = 0.021; and the percentage of CD4+ lymphocytes was 33.8% (IQR 29.4-41.7%) vs. 42.4% (IQR 40.4-48.6%), p = 0.000.