Table 3 Inclusion frequencies of the independent variables in each part of the model of tobacco use
| Â | Part 1: probability of smoking | Part 2: quantity smoked by smokers | ||
|---|---|---|---|---|
Variable | % retained | Rank | % retained | Rank |
Cannabis use | 100.0 | 1 | 76.9 | 7 |
Position about smoke-free universities | 99.8 | 2 | 90.6 | 2 |
Perceived friends' approval of regular smoking | 97.7 | 3 | 90.2 | 3 |
Tobacco perception score | 94.4 | 4 | 41.8 | 25 |
Perceived prevalence of smoking among friends | 92.2 | 5 | 65.1 | 14 |
Frequency of being disturbed by people smoking in university | 90.1 | 6 | 98.6 | 1 |
Binge drinking | 86.7 | 7 | 49.6 | 22 |
Gender | 84.3 | 8 | 53.9 | 20 |
Attitudes towards tobacco industry score | 79.5 | 9 | 44.9 | 24 |
Knowledge of university tobacco policy | 76.8 | 10 | 32.3 | 30 |
Parents together | 74.5 | 11 | 46.2 | 23 |
Smoking prevalence in class | 72.7 | 12 | 69.1 | 11 |
Perceived friends' approval of occasional smoking | 66.4 | 13 | 54.8 | 18 |
Alcohol use | 66.3 | 14 | 71.8 | 9 |
Number of friends | 66.2 | 15 | 67.0 | 13 |
Cannabis use prevalence in class | 54.0 | 16 | 75.7 | 8 |
BMI | 53.2 | 17 | 36.6 | 28 |
Perceived smoking prevalence by peer students | 51.6 | 18 | 70.2 | 10 |
Perceived exposure to tobacco prevention campaigns | 51.4 | 19 | 60.0 | 16 |
Tobacco prevention campaigns perception score | 50.8 | 20 | 67.4 | 12 |
Perceived friends' approval of smoking experimentation | 48.4 | 21 | 55.9 | 17 |
Academic discipline | 47.8 | 22 | 82.0 | 6 |
Binge drinking prevalence in class | 41.0 | 23 | 39.2 | 27 |
Partner status (having one partner or not) | 39.0 | 24 | 50.0 | 21 |
Number of friends in class | 33.3 | 25 | 54.8 | 18 |
Age | 30.7 | 26 | 83.9 | 4 |
Previous exposure to substance-use questionnaires | 30.0 | 27 | 61.3 | 15 |
Final high school exam grade | 29.7 | 28 | 35.1 | 29 |
Alcohol drinking prevalence in class | 29.6 | 29 | 31.2 | 31 |
Self-esteem score | 25.7 | 30 | 39.7 | 26 |
Beliefs about tobacco industry score | 25.5 | 31 | 83.8 | 5 |