Table 4

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)
YearInteraction: year and smoking status
(Weighted N)(3738)(3856)
Easier to smoke than others
 Agree28% (26% to 31%)26% (23% to 28%)χ2 (2)=14.83, p<0.001χ2 (6)=2.33, p=0.89
 Disagree22% (20% to 24%)19% (17% to 20%)
 Don't know49% (47% to 52%)56% (53% to 59%)
More addictive than others
 Agree33% (32% to 35%)34% (32% to 36%)χ2 (2)=6.68, p=0.04χ2 (6)=19.66, p=0.003
 Disagree20% (19% to 22%)18% (16% to 19%)
 Don't know46% (44% to 49%)49% (46% to 51%)
Easier to quit than others
 Agree18% (16% to 19%)16% (14% to 17%)χ2 (2)=1.47, p=0.48NA
 Disagree32% (30% to 34%)31% (29% to 33%)
 Don't know51% (48% to 53%)54% (51% to 56%)
Contain more harmful substances
 Agree37% (35% to 39%)38% (36% to 41%)χ2 (2)=10.63, p=0.005χ2 (6)=6.64, p=0.36
 Disagree20% (18% to 22%)17% (15% to 18%)
 Don't know43% (41% to 45%)45% (43% to 47%)
Have better looking packs than others
 Agree43% (40% to 44%)25% (23% to 28%)χ2 (2)=117.41, p<0.001χ2 (6)=28.51, p<0.001
 Disagree25% (24% to 27%)36% (34% to 38%)
 Don't know32% (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.