Table 2.
Descriptive Statistics for Past 12-month Vaping Groups at Baseline (T1). Percentages and Means With 95% Confidence Intervals
| Non-users at T1 (n = 1785) | Users of e-cigarettes with nicotine at T1 (n = 52) | Users of e-cigarettes without nicotine at T1 (n = 154) | ||
|---|---|---|---|---|
| Range | %/Mean (95% CI) | %/Mean (95% CI) | %/Mean (95% CI) | |
| Variables measured at T1 | ||||
| Gender (male) | 0–1 | 39.4 (37.2–41.7) | 50.0 (36.7–63.3) | 57.8 (49.9–65.3) |
| Age | 12–16 | 14.12 (14.08–14.16) | 14.63 (14.43–14.83) | 14.53 (14.40–14.65) |
| Sensation-seeking | 1–5 | 2.85 (2.81–2.90) | 3.73 (3.45–4.00) | 3.48 (3.34–3.63) |
| Conduct problems | 0–21 | 0.61 (0.56–0.67) | 3.67 (2.62–4.71) | 2.17 (1.72–2.62) |
| Depression | 0–27 | 5.34 (5.09–5.58) | 11.38 (9.29–13.48) | 6.95 (6.02–7.88) |
| Snus | ||||
| Used in the last 12 months | 0–1 | 2.7 (2.0–3.6) | 57.7 (44.0–70.3) | 23.4 (17.4–30.7) |
| Used in the last 30 days | 0–1 | 1.1 (0.7–1.7) | 32.7 (21.4–46.4) | 13.6 (9.1–20.0) |
| Cigarettes | ||||
| Used in the last 12 months | 0–1 | 1.9 (1.4–2.7) | 59.6 (45.9–72.0) | 16.2 (11.2–22.9) |
| Used in the last 30 days | 0–1 | 0.7 (0.4–1.3) | 32.7 (21.4–46.4) | 9.1 (5.5–14.8) |