Australia (B) 6 rotating, text labels, 25% of front, 33% of back; (I) 14 rotating, graphic labels, 30% of front, 90% of back*, 2305; Canada (B) 16 rotating, graphic labels, 50% of pack, 2214; UK (B) 6 rotating, text labels, 6% of front; (I-1) 16 rotating, text labels, 30% of front, 40% of back; (I-2) banned use of “light”, “mild”, 2401; US (B) 4 rotating, text labels on side, 2138
Made a quit attempt lasting more than 24 hours since previous survey, and among those who did, whether quit attempt lasted at least 1 month
Australia F1 quit rate: 14.99% F2 quit rate: 22.93% F3 quit rate: 25.15% F4 quit rate: 25.90% Canada F1 quit rate: 19.84% F2 quit rate: 23.96% F3 quit rate: 22.81% F4 quit rate: 21.34% United Kingdom F1 quit rate: 16.83% F2 quit rate: 22.68% F3 quit rate: 28.93% F4 quit rate: 23.94% United States F1 quit rate: 14.42% F2 quit rate: 19.23% F3 quit rate: 20.31% F4 quit rate: 20.36%
*Health warning label also included the quitline phone number. aRR: adjusted rate ratio; B: baseline; CI: confidence interval; CTUMS: Canadian Tobacco Use Monitoring Surveys; F: followup period; I: intervention; ITC: International Tobacco Control Policy Research Survey; se: standard error; UK: United Kingdom; US: United States.