Table 1.

Association between IL-33 expression and clinicopathological features

Characteristic	IL-33 high	IL-33 low	Total	χ 2	P value
Gender
Male	31	33	64	1.063	0.303
Female	3	1	4
Age
< 60	20	12	32	3.778	0.052
≥ 60	14	22	36
Tumor grade
T1–2	20	29	49	5.916	0.015*
T3–4	14	5	19
Tumor differentiation
High	12	14	26	3.324	0.190
Medium	9	11	22
Low	14	6	20
Lymph node metastasis
No	24	33	57	8.785	0.003**
Yes	10	1	11
AJCC TNM stage
I–II	18	29	47	8.336	0.004**
III–IV	16	5	21

*P < 0.05 and **P < 0.01