CRP and anemia (phenotype): Our results supported the “inflammation-anemia” axis theory proposed by Weiss et al.[20] Previous studies have mostly focused on the relationship between traditional inflammatory markers such as C-reactive protein (CRP) and interleukin-6 (IL-6) and renal anemia.[21] Although these traditional indicators can reflect the inflammatory state to some extent, they only represent a single inflammatory factor, and it is difficult to fully reflect the complex inflammation and immune network of the body.