Table 3: Multivariable logistic regression of susceptibility to smoking stratified by family smoking status.
| Characteristic (reference category) | Susceptibility to initiating smoking | |||
|---|---|---|---|---|
| No family smokers | One or more family smokers | |||
| OR estimate | 95% CI | OR estimate | 95% CI | |
| Smoke-free home (smoking permitted) | ||||
| Completely | 0.582* | (0.428-0.791) | 0.878 | (0.721-1.071) |
| Sex (female) | ||||
| Male | 1.023 | (0.871-1.200) | 1.058 | (0.879-1.275) |
| Grade (12) | ||||
| 9 | 1.228 | (0.964-1.564) | 1.873* | (1.406-2.494) |
| 10 | 1.407* | (1.107-1.789) | 1.554* | (1.163-2.078) |
| 11 | 0.973 | (0.753-1.258) | 1.414* | (1.035-1.931) |
| Province (Ontario)† | ||||
| Atlantic | 0.889 | (0.749-1.056) | 0.828* | (0.686-0.999) |
| Quebec | 0.790 | (0.597-1.046) | 0.657* | (0.482-0.895) |
| Saskatchewan | 1.119 | (0.934-1.340) | 0.933 | (0.751-1.158) |
| Alberta | 0.928 | (0.743-1.158) | 0.922 | (0.717-1.186) |
| British Columbia | 0.966 | (0.795-1.175) | 0.789 | (0.622-1.001) |
| Race (non-white)† | ||||
| White | 1.259* | (1.050-1.510) | 0.867 | (0.698-1.077) |
| Overall self-esteem score (≥ 12)† | ||||
| ≤ 8 | 2.021* | (1.578-2.588) | 2.729* | (1.970-3.781) |
| 9-11 | 1.140 | (0.898-1.448) | 1.742* | (1.265-2.400) |
| School grade (levels 3 and 4)† | ||||
| Level 3 | 1.080 | (0.873-1.335) | 1.309* | (1.061-1.615) |
| Level 2 and lower | 1.526* | (1.024-2.272) | 1.400 | (0.813-2.410) |
Note: CI = confidence interval, OR = odds ratio.
*Significant at the p = 0.05 level.
†Some missing values for this variable in the study population.