Table 2.
Percentage of past-30-day (P30D) cigarette smoking at each follow-up wave by covariates at its corresponding baseline wave among baseline never cigarette smokers.
| Covariates at Corresponding Baseline Wave | P30D Cigarette Smoking at Follow-up Waves | ||
|---|---|---|---|
| Wave 2 (n = 5001) | Wave 3 (n = 6637) | Wave 4 (n = 8177) | |
| % (95% CI) | % (95% CI) | % (95% CI) | |
| Total | 1.2 (0.9–1.6) | 0.9 (0.7–1.2) | 1.5 (1.2–1.8) |
| P30D e-cigarette use | |||
| Yes | 4.0 (0.5–27.7) | 12.6 (5.1–27.6) | 9.1 (4.9–16.4) |
| No | 1.2 (0.9–1.6) | 0.8 (0.6–1.2) | 1.4 (1.1–1.7) |
| Age group | |||
| 12–14 | 1.1 (0.8–1.6) | 0.7 (0.5–1.1) | 0.9 (0.6–1.2) |
| 15–17 | 1.9 (0.6–5.9) | 1.7 (1.2–2.5) | 2.6 (2.0–3.5) |
| Sex | |||
| Male | 0.8 (0.5–1.3) | 0.6 (0.4–1.0) | 1.7 (1.3–2.1) |
| Female | 1.6 (1.1–2.2) | 1.3 (0.9–1.8) | 1.4 (1.0–1.9) |
| Race/ethnicity | |||
| Non-Hispanic White | 1.3 (0.9–2.0) | 1.3 (0.9–1.8) | 1.9 (1.4–2.5) |
| Non-Hispanic Black | 0.5 (0.2–1.7) | 0.3 (0.1–0.8) | 0.8 (0.4–1.7) |
| Non-Hispanic Other | 1.1 (0.4–3.2) | 1.1 (0.4–2.9) | 1.0 (0.5–1.8) |
| Hispanic | 1.2 (0.7–2.0) | 0.6 (0.3–1.1) | 1.4 (1.0–2.0) |
| Sexual orientation (ages 14+) | |||
| Straight/Heterosexual | 1.7 (1.0–2.7) | 1.0 (0.7–1.6) | 2.0 (1.5–2.5) |
| Gay, lesbian, bisexual, or other | 4.7 (1.6–12.9) | 3.3 (1.5–7.1) | 5.3 (3.4–8.3) |
| Parental education | |||
| Less than high school | 1.5 (0.8–2.8) | 0.6 (0.3–1.5) | 2.1 (1.4–3.0) |
| High school graduate | 1.7 (0.9–3.0) | 1.4 (1.7–2.8) | 1.4 (0.9–2.2) |
| Some college or associate degree | 1.9 (1.1–3.0) | 0.8 (0.5–1.3) | 1.8 (1.3–2.5) |
| Bachelor’s degree or above | 0.6 (0.3–1.0) | 0.8 (0.5–1.4) | 1.1 (0.7–1.7) |
| P30D use of other tobacco products 1 | |||
| Yes | 4.5 (0.5–30.8) | 8.7 (2.2–29.0) | 12.7 (6.1–24.8) |
| No | 1.2 (0.9–1.6) | 0.9 (0.7–1.2) | 1.4 (1.2–1.8) |
| Past year internalizing problems | |||
| Low | 0.7 (0.4–1.2) | 0.6 (0.4–1.0) | 1.3 (0.9–1.8) |
| Moderate | 1.5 (0.9–2.5) | 1.2 (0.7–2.0) | 1.1 (0.7–1.7) |
| High | 1.8 (1.1–3.0) | 1.4 (0.8–2.4) | 2.6 (1.9–3.5) |
| Past year externalizing problems | |||
| Low | 0.4 (0.2–0.9) | 0.6 (0.4–1.0) | 1.1 (0.8–1.6) |
| Moderate | 1.1 (0.6–2.0) | 0.8 (0.4–1.6) | 1.2 (0.8–1.9) |
| High | 2.5 (1.7–3.6) | 1.5 (0.9–2.4) | 2.2 (1.6–2.9) |
1 Other tobacco included cigars (traditional cigars, cigarillos, or filtered cigars), hookah, and smokeless tobacco (snus pouches, loose snus, moist snuff, dip, spit, or chewing tobacco).