Our study results indicate that WBC and PLT have poor diagnostic values for PJI; ESR, CRP, PLR, PVR, NLR, and MLR have medium diagnostic values for PJI; and the PLR, PVR, NLR, and MLR are not superior to the ESR or CRP in diagnosing PJI (Fig. 3). This evidence concerns the gene CRP and juvenile polyposis syndrome.