Table 2.

The correlation between the expression level of EGFR in tumor cells and tumor stroma

EGFR-tc	n		n	χ2	P-value
	EGFR-ts low	EGFR-ts high
Low	64	39	103	0.024	0.876
High	85	54	139

Note: EGFR expression in tumor cells and its correlation with clinicopathological variables.

Abbreviations: EGFR, epidermal growth factor receptor; EGFR-tc, EGFR expressed in tumor cells; EGFR-ts, EGFR expressed in tumor stroma.