Demographic and smoking-related characteristics of (a) all randomised participants (n=564) and (b) participants who had never smoked tobacco cigarettes or used e-cigarettes (n=411)
| (a) All randomised participants (n=564) | ||||
|---|---|---|---|---|
| Control n=187 | Glamourous adverts n=186 | Health adverts n=191 | Total n=564 | |
| Age, M (SD) | 13.43 (1.81) | 13.38 (1.64) | 13.38 (1.74) | 13.40 (1.73) |
| Gender, Male % (n) | 44.4 (83) | 52.2 (97) | 52.4 (100) | 49.6 (280) |
| Ethnicity, White % (n) | 77.5 (145) | 77.4 (144) | 80.1 (153) | 78.4 (442) |
| Ethnicity, Asian % (n) | 11.8 (22) | 12.4 (23) | 8.4 (16) | 10.8 (61) |
| Ethnicity, Black % (n) | 5.9 (11) | 4.3 (8) | 5.2 (10) | 5.1 (29) |
| Ethnicity, mixed % (n) | 1.6 (3) | 5.9 (11) | 5.8 (11) | 4.4 (25) |
| Ethnicity, other % (n) | 3.2 (6) | 0 (0) | 0.5 (1) | 1.2 (7) |
| Cigarette use, yes % (n) | 22.5 (42) | 20.4 (38) | 20.9 (40) | 21.3 (120) |
| Cigarette experimentation, yes % (n) | 24.1 (45) | 25.3 (47) | 22 (42) | 23.8 (134) |
| E-cigarette awareness, yes % (n) | 88.2 (165) | 88.2 (164) | 84.8 (162) | 87.1 (491) |
| E-cigarette use, yes % (n) | 17.1 (32) | 12.9 (24) | 13.1 (25) | 14.4 (81) |
| (b) Final sample of non-smokers and non-users of e-cigarettes (n=411) | ||||
| Control n=133 | Glamourous adverts n=136 | Health adverts n=142 | Total n=411 | |
|---|---|---|---|---|
| Age, M (SD) | 13.09 (1.74) | 13.14 (1.62) | 13.03 (1.69) | 13.09 (1.68) |
| Gender, Male % (n) | 40.6 (54) | 49.3 (67) | 51.4 (73) | 47.2 (19) |
| Ethnicity, White % (n) | 72.2 (96) | 72.8 (99) | 76.8 (109) | 74.0 (304) |