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Table 4 Univariate and multivariate Cox regression analyses for overall survival in ovarian serous carcinomas

From: PD-L1 expression on stromal tumor-infiltrating lymphocytes is a favorable prognostic factor in ovarian serous carcinoma

  Univariate Multivariate
HR (95% CI for HR) p-value HR (95% CI for HR) p-value
Stromal PD-L1
 Low expression 1 [reference]   1 [reference]  
 High expression 0.401 (0.183–0.883) 0.002 0.259 (0.09–0.739) 0.012
Residual tumor
 Optimal 1 [reference]   1 [reference]  
 Suboptimal 2.389 (1.109–5.143) 0.026 2.294 (1.046–5.033) 0.038
Tumor grade
 Grade 1 1 [reference]   1 [reference]  
 Grade 2 8.703 (1.198–63.22) 0.033 3.327 (0.448–24.73) 0.240
 Grade 3 5.84 (0.783–43.55) 0.085 3.041 (0.396–23.35) 0.285
Tumor stage
 Early stage 1 [reference]   1 [reference]  
 Advanced stage 15.39 (2.116–111.9) 0.007 12.27 (1.666–90.39) 0.014