Table 1.

Summary statistics of study population.

Population Characteristics		Drinking and Smoking Habits	N (%)
	Mean (SD)	Smoking status
Age	25.61 (4.99)	1-3 times/week	111(12%)
Height	174.18 (5.14)	4-6 times/week	52(6%)
Weight	67.77 (9.05)	More than 7 times/week	83(9%)
		Never	677(73%)
Ethnicity	N (%)	Smoking frequency
Han	872 (95%)	1-5/day	165(18%)
Yi	10 (1%)	6-12/day	71(8%)
Other	41 (4%)	More than 12/day	10(1%)
Education Level	N (%)	Alcohol consumption frequency
High School and Below	94 (10%)	1-3 times/week	403(44%)
College	739 (80%)	4-6 times/week	3 (0.3%)
Graduate School	90 (10%)	Never	517(56%)
Marriage Status	N (%)	Alcohol consumption
Single, Never Married	734 (90%)	50–150 mL/time	11(1%)
Married	173 (19%)	150–250 mL/time	366(40%)
Divorced	16 (2%)	More than 250 mL/time	29(3%)

Abbreviations: N=number of unique individuals; SD=standard deviation.