Table 4

 Evidence for priming effects of the relationship between smoking perceptions and smoking behaviour among 12–17 year olds

Type of state campaignOdds ratio of interaction term between time period and beliefs about smokingDifference in trends (p value)
Period 1Period 2Period 3
This table shows the odds ratio between the index of beliefs about smoking and smoking in the past 30 days, controlling for media use and GRPs of exposure to truth® ads in the media market, and demographic and background variables (for example, age, sex, race/ethnicity, living with both parents, religiosity, employment, and weekly earnings) and a control variable for the number of months since baseline.
*Odds ratio significantly different from zero at the p<0.05 level.
Current smoking
    Established states0.804*0.781*0.760*
    Newer states0.724*0.796*0.677*
All campaign states0.825*0.793*0.748*0.051
All other states0.756*0.747*0.723*