MKI67 and posterior cortical atrophy: According to the distribution comparison of Kaplan-Meier curve and Log-rank test, it was observed that the KM curves shifted towards the left in the SII/Ki-67/SII-Ki-67 high expression groups, as compared to their corresponding low expression groups (all P < 0.0001) (Fig. 2), indicating that high levels of preoperative SII, Ki-67 index, and preoperative SII combined with Ki-67 index were associated with increased risk of poor prognosis in PCa patients after LRP.