Table S1.

Correlation analysis of PD-L1, IFN-γ expression and CD8⁺ T-cell infiltration in human ICC tissues

		PD-L1		P-value	IFN-γ		P-value
		Negative (n=158)	Positive (n=34)		Negative (n=96)	Positive (n=96)
IFN-γ CD8	Negative (n=96)	87	9	0.002	90	6	<0.001
	Positive (n=96)	71	25		6	90
	Negative (n=96)	91	5	<0.001
	Positive (n=96)	67	29

Notes: Chi-squared test. P<0.05 was considered statistically significant.

Abbreviations: ICC, intrahepatic cholangiocarcinoma; IFN, interferon; PD-L1, programmed death ligand 1.