Correlation between Macrophage Polarization and PD-L1-Related Tumor Microenvironmental Alteration and Metastasis in Pancreatic Ductal Adenocarcinoma

Table 3

CD163 positive cells infiltration in primary tumors compared to metastases.

	Samples	CD163		Z	value^∗
		Range	Median
Primary tumor	42	7.6–38.2	27.1	−2.175	0.030
Metastasis	50	8.4–45	31.0

Bold values indicate statistically significant correlations with values less than 0.05. ^∗Mann–Whitney U test.