Table 2 Results from multivariate logistic regression models of predicting involvement in premarital sex by age 22, TYP (N=1,777)

Covariates at age 20

AOR

95% CI

AOR

95% CI

AOR

95% CI

AOR

95% CI

AOR

95% CI

AOR

95% CI

Adolescent risky health behavior

Adolescent's cigarettes use

 Smokers

2.4^**

(1.4-4.0)

2.0^**

(1.2-3.5)

2.1^*

(1.2-3.9)

2.1

(0.7-6.5)

0.9

(0.3-3.3)

1.0

(0.3-3.7)

 Non-smokers

1.0

1.0

1.0

1.0

1.0

1.0

Adolescent's alcohol use

 Heavier drinkers

2.0

(0.9-4.4)

2.7^§

(1.0-7.5)

2.7^*

(1.1-6.8)

3.0^*

(1.1-8.4)

2.0

(0.7-6.0)

2.0

(0.7-5.9)

 Light drinkers

1.2

(0.8-1.9)

1.4

(0.9-2.3)

1.2

(0.8-2.1)

2.4^***

(1.5-3.8)

2.4^**

(1.4-4.2)

2.1^*

(1.2-3.6)

 Abstainers

1.0

1.0

1.0

1.0

1.0

1.0

Peers characteristics

Perceived cigarettes use of close friends

 Smokers

0.9

(0.5-1.5)

0.9

(0.5-1.4)

3.0^***

(1.6-5.5)

2.4^**

(1.3-4.7)

 Non-smokers

1.0

1.0

1.0

1.0

Perceived alcohol use of close friends

 Heavier drinkers

0.5

(0.2-1.4)

0.5

(0.2-1.3)

0.9

(0.4-1.3)

1.1

(0.3-4.4)

 Light drinkers

0.7

(0.4-1.2)

0.7

(0.4-1.2)

0.7

(0.2-3.5)

0.7

(0.4-1.2)

 Abstainers

1.0

1.0

1.0

1.0

Perceived sexual behavior of close friends

 Half or greater

3.5^***

(1.9-6.5)

3.1^**

(1.6-6.1)

2.5^*

(1.2-5.2)

1.8

(0.8-4.0)

 Less than half

1.4^§

(0.9-2.2)

1.4

(0.9-2.1)

1.6^*

(1.03-2.5)

1.2

(0.7-2.1)

 None or unknown

1.0

1.0

1.0

1.0

Attitude toward premarital sex

 Premarital sex permissiveness

1.3^§

(0.97-1.9)

1.6^**

(1.2-2.3)

Stressful life and behavioral events

Stressful school events

 Yes

0.6

(0.3-1.1)

0.9

(0.5-1.5)

 No

1.0

1.0

Number of stressful personal events

 2 or more

2.7^***

(1.6-4.7)

1.7^*

(1.001-3.0)

 1

1.4^§

(0.96-2.1)

1.6^§

(0.995-2.5)

 0

1.0

1.0

Deviant behaviors

 Yes

1.0

(0.7-1.4)

1.1

(0.6-1.8)

 No

1.0

1.0

Psychological complaints

1.0

(1.0-1.0)

1.0

(1.0-1.0)

Family SES

Maternal education

 College or higher

0.6^*

(0.3-0.99)

0.7

(0.4-1.1)

 Senior HS

0.9

(0.6-1.4)

0.9

(0.6-1.3)

 Junior HS or lower

1.0

1.0

Monthly family income

1.1

(1.0-1.1)

1.1^*

(1.004-1.2)

Family structure

 Lives with both biological parents

1.0

(0.6-1.6)

0.7

(0.4-1.1)

 Others

1.0

1.0

Perceived family support

School work

 Yes

1.3

(0.8-2.0)

1.1

(0.7-1.9)

 No

1.0

1.0

Economic difficulty

 Yes

0.8

(0.5-1.3)

1.1

(0.5-2.3)

 No

1.0

1.0

Emotional difficulty

 Yes

0.8

(0.5-1.2)

0.8

(0.5-1.2)

 No

1.0

1.0

Perceived friend support

School work

 Yes

0.9

(0.6-1.4)

2.9^*

(1.3-6.6)

 No

1.0

1.0

Economic difficulty

 Yes

0.9

(0.6-1.4)

1.1

(0.7-1.8)

 No

1.0

1.0

Emotional difficulty

 Yes

2.0^*

(1.1-3.5)

0.8

(0.4-1.6)

 No

1.0

1.0