Metabolomics of Esophageal Squamous Cell Carcinoma Tissues: Potential Biomarkers for Diagnosis and Promising Targets for Therapy

Table 2

Clinical sample characteristic information statistics.

Characteristic	Quantity	Percentage %
Gender
Male	159	75.7
Female	51	24.3
Age
	36	17.14
	102	48.57
	72	34.29
Smoking status
Ever	90	42.9
Never	120	57.1
BMI
Underweight	18	8.57
Normal	157	74.76
Overweight	26	12.38
Obese	9	4.29