Table I.

Associations between CBX3/HP1γ expression and multiple clinicopathological parameters in primary TSCC.

		CBX3/HP1γ expression
Variables	Cases	Lowa	High	χ2 P-value
Age				0.182
<60	81	28	53
≥60	45	21	24
Gender				0.273
Male	80	34	46
Female	46	15	31
Smoking				0.745
Yes	64	24	40
No	62	25	37
Tumor size				0.843
T1–2	107	42	65
T3-4	19	7	12
Pathological grade				0.824
G1	99	38	61
G2-3	27	11	16
Cervical node metastasis				0.010
N-	89	41	48
N+	37	8	29
Clinical stage				0.025
I–II	80	37	43
III–IV	46	12	34

^aBoth of patients with low and negative CBX3/HP1γ staining are stratified into low category for simplicity. TSCC, tongue squamous cell carcinoma.