The ORs for smoking at baseline, smoking at follow-up and smoking initiation over the course of the study
| Bivariate analyses | Model 1 * | |||||
|---|---|---|---|---|---|---|
| Baseline characteristics | Smoking at baseline | Smoking at follow-up | Smoking initiation | Smoking at baseline | Smoking at follow-up | Smoking initiation |
| Grade point average (grade)† | 1.6 (1.4 to 1.9) | 1.6 (1.4 to 1.9) | 1.1 (0.9 to 1.4) | 1.6 (1.4 to 1.9) | 1.7 (1.4 to 1.9) | 1.2 (0.9 to 1.4) |
| Behavioural grade (grade)† | 2.5 (1.9 to 3.3) | 2.1 (1.6 to 2.7) | 0.9 (0.6 to 1.3) | 2.6 (2.0 to 3.5) | 2.3 (1.7 to 2.9) | 0.9 (0.6 to 1.3) |
| School Absence | ||||||
| Almost never | REF | REF | REF | REF | REF | REF |
| Rarely | 2.0 (1.4 to 2.8) | 2.3 (1.7 to 3.2) | 1.7 (1.0 to 2.8) | 2.0 (1.4 to 2.7) | 2.3 (1.7 to 3.2) | 1.7 (1.1 to 2.8) |
| From time to time | 2.7 (1.7 to 4.2) | 3.5 (2.3 to 5.4) | 2.5 (1.4 to 4.6) | 2.7 (1.7 to 4.2) | 3.6 (2.3 to 5.5) | 2.6 (1.5 to 4.8) |
| Often | 4.0 (1.9 to 8.6) | 4.1 (2.0 to 8.6) | 1.7 (0.5 to 5.0) | 4.5 (2.1 to 95) | 4.5 (2.1 to 9.4) | 1.8 (0.6 to 5.5) |
| Sport participation | ||||||
| Never been involved | REF | REF | REF | REF | REF | REF |
| Currently involved | 1.1 (0.8 to 1.7) | 1.2 (0.8 to 1.6) | 1.2 (0.8 to 1.8) | 1.1 (0.7 to 1.7) | 1.2 (0.8 to 1.8) | 0.9 (0.5 to 1.8) |
| Quit | 1.0 (0.7 to 1.4) | 1.4 (1.0 to 1.9) | 1.7 (1.1 to 2.7) | 1.0 (0.7 to 1.4) | 1.4 (1.0 to 1.9) | 1.7 (1.1 to 2.9) |
| Experience in sport | ||||||
| Never been involved | REF | REF | REF | REF | REF | REF |
| Less than a year | 1.3 (0.9 to 2.1) | 2.3 (1.5 to 3.4) | 2.6 (1.4 to 4.9) | 1.4 (0.9 to 2.1) | 2.7 (1.6 to 3.8) | 2.7 (1.4 to 5.2) |
| 2–5 years | 1.4 (0.9 to 2.1) | 2.1 (1.4 to 3.0) | 2.8 (1.5 to 5.2) | 1.4 (0.9 to 2.1) | 2.4 (1.6 to 3.6) | 3.3 (1.7 to 6.2) |
| >5 years | 1.4 (0.9 to 2.1) | 1.4 (0.9 to 2.0) | 1.1 (0.6 to 2.3) | 1.4 (0.8 to 2.2) | 1.5 (0.9 to 2.5) | 1.4 (0.7 to 2.9) |
| Sport success/result | ||||||
| Never competed | REF | REF | REF | REF | REF | REF |
| Local rank | 1.5 (1.1 to 2.1) | 1.4 (1.1 to 1.9) | 1.5 (1.0 to 2.2) | 1.5 (1.1 to 2.0) | 1.5 (1.1 to 2.0) | 1.6 (1.1 to 2.5) |
| National/international | 1.2 (0.7 to 2.2) | 1.1 (0.6 to 1.9) | 0.9 (0.4 to 2.4) | 1.3 (0.7 to 2.2) | 1.2 (0.7 to 2.1) | 1.0 (0.4 to 2.4) |
* Adjusted for age, gender and socioeconomic status.
†The higher value presents poorer scholastic achievement.