All Statistical analysis was performed with SPSS 26.0 (SPSS, Chicago, IL). The association between the PAR groups and clinicopathological characteristics was analyzed by the χ2 test. Survival curves for OS and PFS were plotted via the Kaplan–Meier method and compared by the log-rank test. Univariate and multivariate cox analyses were conducted to identify the independent risk or prognostic factors. A P value < 0.05 was considered as statistically significant.
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