FGF23 and vitamin D deficiency: In addition, studies have shown that FGF‐23 levels are positively correlated with hs‐CRP,16 Serum 25‐hydroxyvitamin D is negatively correlated with CRP in patients with vitamin D deficiency,17 and hs‐CRP levels in the severe SHPT group are higher than those in the mild SHPT group.18