TABLE 2

Predictors of Smoking Initiation After 12 and 30 Months

Baseline CharacteristicsSmoking at 12 mo (n = 1182), OR (95% CI)Smoking at 30 mo (n = 895), OR (95% CI)
Constant0.02 (0.01–0.06)0.03 (0.02–0.04)
Grade level
    61.001.00
    70.88 (0.58–1.32)1.41 (1.19–1.67)
    81.44 (0.99–2.10)1.26 (1.07–1.49)
Male gender0.94 (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 smoker1.54 (1.12–2.12)1.25 (1.09–1.44)
At least 1 friend smokes1.67 (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)1.001.00
    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.