Table 4 Logistic regression estimates (OR) of predictors of health risk behaviours (girls) [OR (95 % CI), n = 315]

Best friend is smoking

20 (10.3-38.9)***

2.91 (1.78-4.77)***

2.24 (1.36-3.68)**

Best friend drinks alcohol

6.69 (3.19-14)***

18.8 (10-35.1)***

5.5 (2.59-11.7)***

Friends’ smoking

 None/Minority of friends

1

1

1

 Half of friends

3.53 (1.85-6.74)***

1.83 (1.01-3.34)*

2.92 (1.56-5.45)**

 Majority/All of friends

11.9 (6.17-23.1)***

3.65 (1.85-7.19)***

3 (1.64-5.5)***

Friends’ alcohol use

 None/Minority of friends

1

1

1

 Half of friends

1.33 (0.62-2.85)

4.63 (1.73-12.4)**

2.12 (1.01-4.84)*

 Majority/All of friends

2.62 (1.23-4.16)**

5.36 (2.32-12.4)***

2.87 (1.52-5.43)**

Loneliness (cont.)

0.99 (0.95-1.02)

0.96 (0.92-0.99)*

0.97 (0.93-1)

Shyness (cont.)

0.97 (0.94-0.99)*

0.98 (0.95-1.01)

0.98 (0.95-1.01)

Need to belong (cont.)

0.97 (0.93-1.01)

0.99 (0.95-1.03)

0.98 (0.94-1.03)

Competitiveness (cont.)

1.02 (0.99-1.04)

1 (0.97-1.02)

1 (0.97-1.02)

Age (cont.)

1.21 (0.98-1.49)

1.37 (1.11-1.68)**

0.89 (0.72-1.11)