Int. J. Environ. Res. Public Health 2011, 8 1683 Overall Behavior Use Behavior at Last Purchase N % Table 3. Cont. Univariate Analysis a: Percent Reporting Cessation Outcome by Behavior Overall Make Quit Successful Quit at Attempt Quit Attempt Follow-up Multivariate Analysis b Make a Quit Attempt Quit at Follow-up Successful Quit Attempt Number of Strategies Used 0 1,496 34.5% 43.5% 13.4% 30.6% 1.00 1.00 1 2,377 48.4% 36.3% 10.4% 28.8% 0.78 (0.68–0.90) 0.75 (0.61–0.93) 2+ 963 17.1% 31.0% 8.0% 43.9% 0.69 (0.57–0.84) 0.59 (0.42–0.81) p based on chi square p < 0.001 p < 0.001 p = 0.265 p for interaction with SES p = 0.460 p = 0.575 * Purchasing by carton excludes respondents who purchased RYO Tobacco. a Univariate Analyses: Weighted percentages; p values passed on chi square analysis. Bolded entries are statistically significant at p < 0.05 level. b Multivariate Analyses: Each row represents a separate multivariate logistic regression model assessing whether the purchasing behavior of interest was predictive of cessation indicators. at follow-up. All OR‘s are adjusted for: SES, country, age, sex, ethnicity, HSI. ** There was a significant interaction by SES for those using low/untaxed sources and making a successful quit attempt. Stratified analysis by SES: High SES (OR = 1.555, 95% CI: 0.817-2.959) Moderate (OR = 0.445 95% CI: 0.225-0.880) Low SES (OR = 0.440 95% CI: 0.135-1.439) 1.00 0.83 (0.65–1.06) 0.68 (0.47–0.98) p = 0.713