Table 1.

Cox multivariate analysis demonstrating the independent risk factors for the cancer-specific death of the patients with ovarian cancer (n = 70)

Variable	n	Overall survival, multivariate risk ratio	P value	Progression-free survival, multivariate risk ratio	P value
Analysis with PD-L1 expression
PD-L1 expression			0.011		0.027
Low	22	1		1
High	48	4.26 (1.39–12.94)		2.57 (1.11–5.93)
Tumor status			0.041
pT1 + pT2	31	1
pT3	39	4.05 (1.06–15.50)
LN metastasis			0.027		0.002
pN0	56	1		1
pN1	14	2.98 (1.13–7.83)		3.37 (1.59–7.15)
Residual tumor			<0.001		<0.001
Optimal	49	1		1
Suboptimal	21	8.83 (2.74–28.48)		5.99 (2.92–2.27)
Analysis with intraepithelial CD8+ TIL
Intraepithelial CD8+ TIL			<0.001		0.001
Negative	38	7.62 (2.76–21.08)		3.75 (1.74–8.07)
Positive	32	1		1
LN metastasis			0.040		0.001
pN0	56	1		1
pN1	14	2.72 (1.05–7.08)		3.43 (1.61–7.34)
Residual tumor			0.006		<0.001
Optimal	49	1		1
Suboptimal	21	3.37 (1.42–7.99)		5.47 (2.69–11.09)

Numbers in parentheses represent 95% C.I.