Table 2.
Logistic regression estimates (OR) of predictors of health risk behaviours [OR (95 % CI), n = 471]
| Predictor variables | Smoking | Drinking | Binge drinking |
|---|---|---|---|
| Best friend is smoking | 16.7 (9.79-28.5)*** | 3.1 (2.02-4.74)*** | 2.08 (1.4-3.08)*** |
| Best friend drinks alcohol | 5.28 (2.85-9.8)*** | 24.2 (13.9-42.2)*** | 7.51 (3.75-15)*** |
| Friends’ smoking | |||
| None/Minority of friends | 1 | 1 | 1 |
| Half of friends | 4.01 (2.32-6.95)*** | 2.11 (1.24-3.59)** | 2.67 (1.61-4.44)*** |
| Majority/All of friends | 13.7 (7.93-23.6)*** | 3.86 (2.17-6.91)*** | 2.93 (1.81-4.74)*** |
| Friends’ alcohol use | |||
| None/Minority of friends | 1 | 1 | 1 |
| Half of friends | 1.73 (0.96-3.11) | 2.93 (1.42-6.02)** | 1.7 (0.95-3.05) |
| Majority/All of friends | 1.84 (1.14-2.97)* | 4.35 (2.27-8.31)*** | 2.87 (1.75-4.70)*** |
| Loneliness (cont.) | 0.95 (0.92-0.98)** | 0.95 (0.93-0.98)** | 0.98 (0.95-1.02) |
| Shyness (cont.) | 0.97 (0.95-0.99)* | 0.97 (0.95-0.99)* | 0.97 (0.95-0.99)* |
| Need to belong (cont.) | 0.98 (0.94-1.01) | 1 (0.96-1.03) | 1 (0.93-1.03) |
| Competitiveness (cont.) | 1 (0.99-1.03) | 1.01 (0.99-1.04) | 1.01 (0.98-1.02) |
| Gender | |||
| Girla | 1 | 1 | 1 |
| Boy | 1 (0.67-1.49) | 1.99 (1.29-3.07)** | 1.57 (1.04-2.37) |
| Age (cont.) | 1.24 (1.04-1.48)* | 1.45 (1.21-1.74)*** | 1.12 (0.94-1.33) |
aReference category
*p < 0.05
**p < 0.01
***p < 0.001