Table I.

Correlation between pathological factors and expression of DRD2 in tumor tissues.

	DRD2 (n)
Variable	Low	High	P-value
Age			0.578
≥65 years	26	18
<65 years	26	14
Gender			0.466
Female	11	9
Male	41	23
Tumor volume			0.623
≥35 cm3	23	16
<35 cm3	27	15
Tumor differentiation			0.163
I, II, II–III	18	16
III	34	16
Metastasis			0.299
Yes	1	2
No	51	30
Node positive			0.587
≥5	25	13
<5	27	18
TNM stage			0.311
1A-2B	22	10
3A-4	30	22

DRD2, dopamine receptor D2; TNM, tumor-node-metastasis.