Table I.

Clinical characteristics of 48 patients and the expression of PLAC2 in primary OSCC tissues.

Characteristics (46)	Case	PLAC2 median (range)	P-value
Age (years)			0.830
<55	27	0.15 (0.10-0.32)
≥55	21	0.16 (0.11-0.28)
Sex			0.185
Male	31	0.17 (0.10-0.32)
Female	17	0.15 (0.10-0.30)
Tumor size			0.036
<5 cm	32	0.13 (0.10-0.29)
≥5 cm	16	0.18 (0.12-0.32)
Histological grade			0.087
Well	10	0.14 (0.11-0.31)
Moderate	27	0.16 (0.10-0.30)
Poor	11	0.17 (0.14-0.32)
TNM stage			0.005
I-Ⅱ	22	0.12 (0.10-0.26)
III-IV	26	0.19 (0.14-0.32)

PLAC2, placenta-specific protein 2; OSCC, oral squamous cell carcinoma; TNM, Tumor-Node-Metastasis.