Table 4.

Factors associated with ongoing unprotect sexual intercourse and multiple sexual intercourse during past 3 months by logistic regression models

	Unprotect sexual intercourse in last three months		Multipal sexual partner in last three months
	B	OR (95% CI)	B	OR (95% CI)
Age		NS		NS
Gender
Male		NS		NS
Female		1.00		1.00
Father’s educational level
Middle school and below		NS		NS
High school		NS		NS
College and above		1.00		1.00
Mother’s educational level
Middle school and below		NS		NS
High school		NS		NS
College and above		1.00		1.00
Family income status
Low (<1500)		NS		NS
Medium (1500–2499)		NS		NS
High (≥2500)		1.00		1.00
Family structure
Single parent family		NS		NS
Nuclear/large family		1.00		1.00
Cigarette smoking in last three months
Often/usually	0.18	2.04 (1.02-4.00) *		NS
No/occasional		1.00		1.00
Drunk in last three months
Often/usually		NS		NS
No/occasional		1.00		1.00
Illict drug use in last three months
Ever had	0.24	2.44 (1.15-5.26) *		NS
Never had		1.00		1.00
Age of the first sexual intercourse in lifetime
≤14 years		NS	0.89	2.45 (1.79-7.08) *
15-17 years		NS	0.68	1.97 (1.24-5.73) *
≥18 years		1.00		1.00
Age of the first sexual partner
≤14 years		NS		NS
15-17 years		NS		NS
≥18 years		1.00		1.00

Family income was expressed in RMB(yuan)/person/month.

OR, odds ratio.

CI, confidence interval.

NS: no significance.

*P<0.05.