Table 1.
Wave 1 covariates by e-cigarette initiation over follow-up among 9,584 cigarette naive youth at baseline
| Covariates measured at wave 1 | Ever e-cigarette use (n=1,763) |
Never e-cigarette use (n=7,821) |
|---|---|---|
| 12-14 years old, N (%) | 829 (47) | 4,719 (60) |
| 15-17 years old, N (%) | 934 (53) | 3,102 (40) |
| Female sex, N (%) | 829 (47) | 3,892 (50) |
| Race/ethnicity, N (%) | ||
| non-Hispanic Black | 206 (12) | 1,172 (15) |
| non-Hispanic white | 874 (50) | 3,665 (47) |
| non-Hispanic Asian or other race | 147 (8) | 721 (9) |
| Hispanic | 536 (30) | 2,263 (29) |
| Parental Education, N (%) | ||
| < High School or equivalent | 639 (36) | 3013 (39) |
| Some college or Associates degree | 586 (33) | 2,385 (31) |
| ≥Bachelors degree | 539 (31) | 2423 (31) |
| Lives with tobacco user, N (%) | 668 (38) | 2,274 (29) |
| Brief Sensation Seeking Scale, median (interquartile range) | 3.0 (2.7-3.7) | 3.7 (3.0-4.3) |
| Externalizing mental health problems, N (%) | ||
| Low | 436 (25) | 3,314 (42) |
| Medium | 619 (35) | 2,474 (32) |
| High | 708 (40) | 2,033 (40) |
| Past 12-month alcohol use, N (%) | 326 (19) | 515 (7) |
| Past 12-month marijuana use, N (%) | 113 (6) | 143 (2) |
| Past 12-month other tobacco use, N (%) | 125 (7) | 142 (2) |
| Parent talked to youth about not using tobacco, N (%) | 954 (54) | 3,924 (50) |
| Grades, N (%) | ||
| Mostly As | 411 (23) | 2,314 (30) |
| Mostly As and Bs | 633 (36) | 2,763 (35) |
| Mostly Bs | 168 (10) | 675 (9) |
| Mostly Bs and Cs or lower | 551 (31) | 2,069 (27) |
| Susceptible to cigarette smoking, N (%) | 813 (46) | 2,061 (26) |
| Believe e-cigarettes are less harmful tshan cigarettes, N (%) | 910 (52) | 1,914 (37) |
| Has a favorite tobacco advertisement, N (%) | 164 (9) | 459 (6) |