Table 2.

5-year survival rates in pulmonary metastases and 10-year survival rates in primary colorectal tumours stratified by ICS and PD-1 and PD-L1.

	n	ICS 0	ICS 1	ICS 2	p-value
Metastases	67	10.0%	25.5%	47.0%	0.046 *
Primary tumours	62	11.1%	41.9%	0.0%	0.152
	n	PD-1 (TC) low	PD-1 (TC), high		p
Metastases	67	23.5%	33.6%		0.114
Primary tumours	61	29.3%	27.2%		0.726
	n	PD-1 (IM) low	PD-1 (IM), high		p
Metastases	63	23.8%	39.7%		0.066
Primary tumours	60	20.7%	42.5%		0.328
	n	PD-L1 (TCe) low	PD-L1 (TCe), high		p
Metastases	67	23.3%	100.0%		0.024
Primary tumours	60	28.2%	0.0%		0.328
	n	PD-L1 (IC) low	PD-L1 (IC), high		p
Metastases	66	27.3%	27.7%		0.943
Primary tumours	60	32.4%	13.9%		0.086

* Statistically significant at the 0.05 level.