TABLE 2.
Predictors of Smoking Initiation After 12 and 30 Months
| Baseline Characteristics | Smoking at 12 mo (n = 1182), OR (95% CI) | Smoking at 30 mo (n = 895), OR (95% CI) |
|---|---|---|
| Constant | 0.02 (0.01–0.06) | 0.03 (0.02–0.04) |
| Grade level | ||
| 6 | 1.00 | 1.00 |
| 7 | 0.88 (0.58–1.32) | 1.41 (1.19–1.67) |
| 8 | 1.44 (0.99–2.10) | 1.26 (1.07–1.49) |
| Male gender | 0.94 (0.68–1.30) | 0.86 (0.75–0.99) |
| Ethnicity (Hispanic vs all others) | 1.59 (1.15–2.22) | 1.43 (1.25–1.65) |
| Racial minority (any vs all others) | 1.01 (0.73–1.40) | 0.88 (0.77–1.01) |
| Self-reported grades (mostly Bs or below) | 1.51 (1.10–2.09) | 1.61 (1.40–1.86) |
| Unsupervised after school (>2 d/wk) | 1.36 (0.98–1.88) | 0.83 (0.73–0.96) |
| Risk-taking propensity (1–4) | 1.51 (1.25–1.81) | 1.41 (1.30–1.53) |
| At least 1 parent/household smoker | 1.54 (1.12–2.12) | 1.25 (1.09–1.44) |
| At least 1 friend smokes | 1.67 (1.06–2.64) | 1.91 (1.56–2.36) |
| Perceived exposure | ||
| See smoking in movies/television (4 = often) | 1.10 (0.91–1.31) | 1.26 (1.17–1.36) |
| See cigarette ads in stores (4 = often) | 0.90 (0.74–1.10) | 1.11 (1.02–1.22) |
| Shopping frequency (visits/wk) | ||
| Low (<0.5) | 1.00 | 1.00 |
| Moderate (0.5–1.9) | 1.64 (1.06–2.55) | 1.19 (1.00–1.41) |
| High (2.0–18.0) | 2.58 (1.68–3.97) | 1.42 (1.19–1.69) |
Odds ratios (ORs) are adjusted for all other variables in the table. CI indicates confidence interval.