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. 2021 Jun 17;10(1):1938381. doi: 10.1080/2162402X.2021.1938381

Table 3.

Univariate and multivariate Cox proportional hazards analysis for progression-free survival and overall survival in EBVaGC

Characteristics PFS       OS      
  Univariate analysis   Multivariate analysis   Univariate analysis   Multivariate analysis  
  HR (95% CI) P value HR (95% CI) P value HR (95% CI) P value HR (95% CI) P value
Age (≤ 57/> 57) 0.64 (0.32–1.30) 0.22     1.16 (0.60–2.23) 0.66    
Sex (Male/Female) 0.80 (0.28–2.28) 0.67     0.91 (0.32–2.58) 0.86    
Tumor size (cm, ≤ 4.5/> 4.5) 2.70 (1.31–5.54) 0.01     3.88 (1.86–8.09) <0.001    
TMN classification (I+ II/III+IV) 27.8 (3.79–203.50) 0.001 25.42 (3.46–186.83) 0.001 25.46 (3.48–186.07) 0.001 16.62 (2.25–122.71) 0.01
Tumor differentiation (poorly/Moderately) 0.72 (0.36–1.46) 0.37     0.65 (0.33–1.29) 0.22    
Lauren classification   0.97       0.26    
Intestinal 1 Reference     1 Reference    
Diffuse 1.15 (0.39–3.37) 0.80     2.33 (0.84–6.44) 0.10    
Mixed 1.02 (0.47–2.23) 0.96     1.49 (0.62–3.56) 0.37    
Nervous invasion (Negative/Positive) 2.97 (1.22–7.23) 0.02     8.71 (2.07–36.58) 0.003    
Venous invasion (Negative/Positive) 4.46 (1.93–10.32) <0.001     5.62 (2.15–14.68) <0.001    
HER2 IHC score (0–1/2-3) 1.06 (0.44–2.59) 0.89     1.83 (0.88–3.81) 0.11    
PD-L1 expression (Negative/Positive) * 0.36 (0.18–0.73) 0.004 0.45 (0.22–0.92) 0.03 0.15 (0.07-.034) <0.001 0.17 (0.06–0.43) < 0.001

Abbreviations: EBVaGC, Epstein-Barr virus associated gastric cancer; HR, hazard ratio; TNM, tumor node metastasis; PD-L1, programmed cell death protein ligand 1; IHC, immunohistochemistry.

* PD-L1 positive expression is defined as CPS score ≥ 1.