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Table 3 Univariate and multivariate Cox regression analyses for overall survival in all types of EOCs

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 0.484 (0.259–0.903) 0.023 0.291 (0.13–0.649) 0.003
Residual tumor
 Optimal 1 [reference]   1 [reference]  
 Suboptimal 2.287 (1.206–4.337) 0.011 1.976 (1.016–3.845) 0.045
Tumor grade
 Grade 1 1 [reference]   1 [reference]  
 Grade 2 3.83 (1.967–7.455) <  0.001 2.026 (0.881–4.66) 0.096
 Grade 3 3.428 (1.685–6.972) 0.001 2.469 (1.026–5.941) 0.044
Tumor stage
 Early stage 1 [reference]   1 [reference]  
 Advanced stage 5.993 (3.079–11.67) <  0.001 4.684 (2.318–9.466) <  0.001