Table 1.

Clinical characteristics of the study population

Characteristics	N = 91	%
Age (years)
<60	30	33
≥60	61	67
Age(mean ± SD)	63.20 ± 8.17
Gender (n)
Male	66	72.5
Female	25	27.5
Drinkinga
Yes	32	35.2
No	56	61.5
Unknown	3	3.3
Smokingb
Yes	56	61.5
No	35	38.5
T stagec
T1	1	1.1
T2	12	13.2
T3	72	79.1
T4	4	4.4
Unknown	2	2.2
N stagec
N0	42	46.2
N1	37	40.7
N2	7	7.7
N3	3	3.3
Unknown	2	2.2
M stagec
M0	88	96.7
M1	1	1.1
Unknown	2	2.2

ESCC esophageal squamous cell carcinoma

^aYes represents individuals who presently consume or formerly consumed alcoholic beverages

^bYes represents the former and current smokers

^cTNM stages were assessed by the seventh edition of the TNM classification criteria