Table 3 Logistic regression models

OR

LL 95%CI

UL 95%CI

p-value*

Female

D

0.653

0.438

0.972

0.036

Age group

D

1.332

0.999

1.776

0.051

Belonging to a group that breaks the rules

S

1.832

1.104

3.039

0.019

Not being the group leader

S

0.743

0.599

0.921

0.007

Perception of drinking by own group

S

1.375

1.273

1.484

0.000

Staying alone

E-pe

0.305

0.145

0.642

0.002

Going to bars

E-pl

2.700

1.302

5.597

0.008

Going to discos

E-pl

4.021

1.504

10.751

0.006

Watching a film

E-a

0.581

0.356

0.949

0.030

Returning home after midnight

E-a

1.878

1.132

3.114

0.015

Logistic regression model 2, dependent variable: binge drinking on Saturday nights (drink more than five alcoholic units)

OR

LL 95%CI

UL 95%CI

p-value*

Female

D

0.23

0.08

0.63

0.004

Belonging to a group that breaks the rules

S

2.77

1.30

5.89

0.008

Perception of drinking by own group

S

1.25

1.10

1.43

0.001

Perception of dangers of drinking and driving

S

0.84

0.74

0.96

0.008

Going to discos

E-pl

5.04

2.03

12.52

0.000

Flirting

E-a

4.28

1.92

9.53

0.000

Returning home after midnight

E-a

2.20

1.04

4.65

0.039

Ordered logistic regression model 3, dependent variable: Attitudes to drinking (non-drinker = 1, ex-drinker = 2, drinker who wants to stop = 3, drinker who does not want to stop = 4)

OR

LL 95%CI

UL 95%CI

p-value*

Age group

D

2.31

1.78

3.01

0.000

Not being the group leader

S

0.84

0.69

1.01

0.080

Belonging to a group that breaks the rules

S

1.98

1.25

3.16

0.004

Perception of drinking by own group

S

1.40

1.28

1.52

0.000

Perception of drinking by parents

S

1.21

1.11

1.32

0.000

Staying alone

E-pe

0.53

0.30

0.94

0.024

Being with own group

E-pe

0.60

0.41

0.90

0.013

Going to bars

E-pl

2.14

1.06

4.31

0.033

Wandering around

E-pl

1.52

1.05

2.20

0.027

Watching a film

E-a

0.68

0.44

1.07

0.098

Playing with the computer

E-a

0.40

0.23

0.69

0.001

Returning home after midnight

E-a

2.51

1.47

4.29

0.001