Main predictor variable
| | | | |
Strength‡ of local restaurant smoking regulation | | | | |
Weak‡ | 8.0 | 92.0 | 1.00 | 1.00 |
Medium‡ | 8.2 | 91.8 | 1.04 (0.73 to 1.47) | 1.06 (0.70 to 1.62) |
Strong‡ | 4.9 | 95.1 | 0.59 (0.38 to 0.92) | 0.39 (0.24 to 0.66) |
Individual level variables
| | | | |
Age at baseline (years) | | | | |
12–14 | 5.0 | 95.0 | 1.00 | 1.00 |
15–17 | 10.5 | 89.5 | 2.21 (1.63 to 3.00) | 1.15 (0.80 to 1.66) |
Sex | | | | |
Male | 8.1 | 91.9 | 1.00 | 1.00 |
Female | 7.0 | 93.0 | 0.86 (0.63 to 1.16) | 0.73 (0.51 to 1.03) |
Race/ethnicity | | | | |
Non-Hispanic white | 7.4 | 92.6 | 1.00 | 1.00 |
Other | 7.6 | 92.4 | 1.02 (0.63 to 1.65) | 1.43 (0.81 to 2.53) |
Smoking status | | | | |
Non-susceptible non-smoker | 2.2 | 97.8 | 1.00 | 1.00 |
Susceptible non-smoker | 6.8 | 93.2 | 3.27 (1.89 to 5.66) | 3.42 (1.96 to 5.99) |
Puffer | 10.9 | 89.1 | 5.45 (3.19 to 9.33) | 4.22 (2.40 to 7.43) |
Experimenter | 29.4 | 70.6 | 18.6 (11.6 to 29.7) | 13.6 (8.03 to 23.0) |
Current smoker | 54.4 | 45.6 | 53.2 (28.8 to 98.3) | 42.8 (21.1 to 86.9) |
Peer smoking | | | | |
No close friend smokes | 4.2 | 95.8 | 1.00 | 1.00 |
At least one close friend smokes | 17.5 | 82.5 | 4.91 (3.68 to 6.54) | 1.99 (1.38 to 2.89) |
Exposure to anti-smoking messages at school | | | | |
No | 8.9 | 91.1 | 1.00 | 1.00 |
Yes | 7.1 | 92.9 | 0.79 (0.56 to 1.11) | 0.70 (0.47 to 1.03) |
Household level variables
| | | | |
Household smoking | | | | |
No adult smoker in household | 5.8 | 94.2 | 1.00 | 1.00 |
Adult smoker in household | 11.2 | 88.8 | 2.04 (1.52 to 2.73) | 1.47 (1.05 to 2.05) |
Education of adult informant | | | | |
Not college graduate | 8.6 | 91.4 | 1.00 | 1.00 |
College graduate | 6.4 | 93.6 | 0.73 (0.53 to 0.99) | 0.96 (0.68 to 1.36) |
Household income | | | | |
⩽$50000 | 7.5 | 92.5 | 1.00 | 1.00 |
>$50000 | 7.2 | 92.8 | 0.97 (0.67 to 1.40) | 1.15 (0.76 to 1.72) |
Town level variables
| | | | |
Percentage of town residents who are college graduates** | – | – | 0.94 (0.86 to 1.02) | 0.80 (0.60 to 1.06) |
Percentage of town “yes” vote on Question 1** | – | – | 0.95 (0.82 to 1.11) | 1.33 (0.80 to 2.23) |
Percentage of town residents who are white** | – | – | 1.13 (1.05 to 1.22) | 1.29 (1.06 to 1.56) |
Percentage of town residents who are youths** | – | – | 0.77 (0.54 to 1.10) | 0.78 (0.52 to 1.17) |
Number of restaurants | | | | |
⩾5 | 7.4 | 92.6 | 1.00 | 1.00 |
<5 | 8.3 | 91.7 | 1.13 (0.75 to 1.69) | 0.71 (0.41 to 1.23) |
Population | | | | |
<20000 | 8.8 | 91.2 | 1.00 | 1.00 |
20000–50000 | 6.7 | 93.3 | 0.74 (0.53 to 1.04) | 0.67 (0.43 to 1.03) |
>50000 | 6.8 | 93.2 | 0.74 (0.53 to 1.03) | 0.90 (0.50 to 1.61) |