Table 3. Different Bmi-1 expression level between gastric cancer patients with stage I-II and stage III-IV.

UICC stage	No.	Bmi-1 expression level (min-max)	Z	P
Stage I-II	129	90 (0-290)	2.304	0.021
Stage III-IV	224	80 (0-300)
Stage II	111	90 (0-290)	2.109	0.035
Stage III	206	80 (0-300)