Table 1. Clinicopathologic characteristics of overall patients (n=81).

Characteristics	Subgroup	Patients, n (%)
Age (y)	<60	43 (53.1)
	≥60	38 (46.9)
Gender	Male	65 (80.2)
	Female	16 (19.8)
Histopathology	Adenocarcinoma	36 (44.4)
	Squama	43 (53.1)
	Othersa	2 (2.5)
Lymph node metastasis	No	30 (37.0)
	Yes	51 (63.0)
TNM stage	I–II	53 (65.4)
	III–IV	28 (34.6)
Differentiation	Poor	45 (55.6)
	Good-moderate	36 (44.4)
Smoking history	No	20 (24.7)
	Yes	61 (75.3)
JMJD5 expression status	Low	59 (72.8)
	High	22 (27.2)

^a, others including adenosquamous carcinoma, large cell carcinoma, sarcoma, etc.