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Table 7 Patient tumor characteristics and frequency of PD-L1 expression

From: Stratification of ovarian tumor pathology by expression of programmed cell death-1 (PD-1) and PD-ligand- 1 (PD-L1) in ovarian cancer

  No. Patients 0 1 2 3 P-value
   PD-L1 Level, n (%)  
Stage of cancer       
 I-II 9 4 (44.4) 3 (33.3) 1 (11.1) 1 (11.1) 0.033
 III-IV 46 33 (71.7) 11 (23.9) 2 (4.3) 0 (0.0)
Tumor grade       
 1–2 13 12 (92.3) 1 (7.7) 0 (0.0) 0 (0.0) 0.033
 3 41 24 (58.5) 13 (31.7) 3 (7.3) 1 (2.4)
  1. Significant P- values in table are indicated in italics