Among students who have seen cigarette pack in previous 6 months, unadjusted proportions (95% CIs) agreeing*, disagreeing† or who don't know for statements regarding differences in ease of smoking, ease of quitting, addictiveness, more harmful and have better looking packs between cigarette brands by year of survey (weighted data)
| χ2 statistic and p value‡ | ||||
|---|---|---|---|---|
| Some cigarette brands are: | 2011 % (95% CI) | 2013 % (95%CI) | Year | Interaction: year and smoking status |
| (Weighted N) | (3738) | (3856) | ||
| Easier to smoke than others | ||||
| Agree | 28% (26% to 31%) | 26% (23% to 28%) | χ2 (2)=14.83, p<0.001 | χ2 (6)=2.33, p=0.89 |
| Disagree | 22% (20% to 24%) | 19% (17% to 20%) | ||
| Don't know | 49% (47% to 52%) | 56% (53% to 59%) | ||
| More addictive than others | ||||
| Agree | 33% (32% to 35%) | 34% (32% to 36%) | χ2 (2)=6.68, p=0.04 | χ2 (6)=19.66, p=0.003 |
| Disagree | 20% (19% to 22%) | 18% (16% to 19%) | ||
| Don't know | 46% (44% to 49%) | 49% (46% to 51%) | ||
| Easier to quit than others | ||||
| Agree | 18% (16% to 19%) | 16% (14% to 17%) | χ2 (2)=1.47, p=0.48 | NA |
| Disagree | 32% (30% to 34%) | 31% (29% to 33%) | ||
| Don't know | 51% (48% to 53%) | 54% (51% to 56%) | ||
| Contain more harmful substances | ||||
| Agree | 37% (35% to 39%) | 38% (36% to 41%) | χ2 (2)=10.63, p=0.005 | χ2 (6)=6.64, p=0.36 |
| Disagree | 20% (18% to 22%) | 17% (15% to 18%) | ||
| Don't know | 43% (41% to 45%) | 45% (43% to 47%) | ||
| Have better looking packs than others | ||||
| Agree | 43% (40% to 44%) | 25% (23% to 28%) | χ2 (2)=117.41, p<0.001 | χ2 (6)=28.51, p<0.001 |
| Disagree | 25% (24% to 27%) | 36% (34% to 38%) | ||
| Don't know | 32% (30% to 35%) | 39% (36% to 41%) | ||
Ninety-four students had missing data on the smoking status variable and were excluded from analyses. Students with missing data on a statement excluded for that analysis. The number of students with missing data for the different variables ranged from 129 to 161.
*Agree or strongly agree combined.
†Disagree or strongly disagree combined.
‡Analyses included smoking status, sex, age, school denomination and state as covariates. NA, not applicable: as there was no main effect of year, the interaction between year and smoking status was not investigated.