Table 1. Immunostaining analysis revealed the expression levels of H3K27me3 in gastric adenocarcinoma, paracarcinoma and normal tissues.

Variable	−	+	++	+++	Positive rate	Cases	χ2value	P value
Gender
Male	12	36	14	4	81.8%	66	1.844	0.605
Female	9	8	6	3	65.4%	26
Age, year
≤60	6	31	11	7	89.1%	55	3.271	0.352
>60	10	19	6	2	73%	37
Pathology
Normal	0	3	7	0	1	10	15.598	0.004*
Paracarcinoma	0	8	21	8	1	37
Adenocarcinoma	0	4	17	24	1	45