Table 1.
Descriptive data for the sample (n=3994)
| n (%) |
|
| Gender | |
| Male | 1904 (47.7) |
| Female | 2090 (52.3) |
| Ethnicity | |
| White | 688 (17.2) |
| Non-white | 3306 (82.8) |
| Family affluence1 | 2.72 (0.49) |
| Ever used e-cigarettes (baseline) | |
| No | 3236 (81.0) |
| Yes | 758 (19.0) |
| Friend smokers | |
| None | 2602 (65.1) |
| A few or more | 1392 (34.9) |
| Family smokers | |
| None | 1502 (37.6) |
| One or more | 2492 (62.4) |
| Impulsivity* | 2.04 (1.65) |
| Intention | |
| Low | 3624 (90.7) |
| High | 370 (9.3) |
| Attitude | |
| Low | 3302 (82.7) |
| High | 692 (17.3) |
| Norms | |
| Low | 3455 (86.5) |
| High | 539 (13.5) |
| Perceived behavioural control | |
| Low | 3260 (81.6) |
| High | 734 (18.4) |
| Self-efficacy | |
| Low | 3239 (81.1) |
| High | 755 (18.9) |
| Free school meals† | |
| Low | 22 (48.9) |
| High | 23 (51.1) |
| Condition† | |
| Control | 20 (44.4) |
| Intervention | 25 (55.6) |
| Ever smoked cigarettes (follow-up) | |
| No | 3180 (79.6) |
| Yes | 814 (20.4) |
| Any recent tobacco smoking (follow-up) | |
| No | 3607 (90.3) |
| Yes | 387 (9.7) |
| Regularly smoked cigarettes (follow-up) | |
| No | 3910 (97.9) |
| Yes | 84 (2.1) |
*Mean and SD for these variables.
†Number of schools.