Table 4.
Format of branding encountered among youth who reported seeing Internet-based tobacco branding.
| Formata | 2010 (n=850) | 2011 (n=967) | 2012 (n=999) | 2013 landline (n=1033) | Pb | 2013
dual-frame (n=1384) |
Pb |
| Pop-up messages | 19% | 21% | 20% | 19% | .632 | 20% | .643 |
| Banner adsc | 16% | 17% | 19% | 17% | .314 | 16% | .203 |
| Google ads | 4% | 4% | 7% | 3% | .004 | 3% | .002 |
| 9% | 15% | 21% | 22% | <.001 | 22% | <.001 | |
| YouTube | 2% | 3% | 9% | 12% | <.001 | 11% | <.001 |
| Don’t know | 40% | 32% | 27% | 28% | <.001 | 29% | <.001 |
aOnly formats with at least 5% of sample naming them are included.
bP value from Pearson chi-square tests for proportions.
cAds: advertisements.