Table 3.

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

	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