Int. J. Environ. Res. Public Health 2011, 8 Behavior at Last Purchase Use Discount Brand or RYO Tobacco No Use Discounts Use RYO p based on chi square p for interaction with SES Use Low or Untaxed Source No Yes p based on chi square p for interaction with SES Purchase tobacco by Carton (last)* No Yes p based on chi square p for interaction with SES Use at least one strategy No Yes p based on chi square p for interaction with SES N 2,279 1,846 756 4,455 502 2,779 1,467 1,496 3,340 % 8.7% 34.9% 16.5% 90.7% 9.3% 69.7% 30.3% 34.5% 65.5% Table 3. Purchasing Behaviors at baseline as predictors of Cessation Outcomes at 1 year follow-up. Overall Behavior Use 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 38.6% 37.4% 33.6% p = 0.038 38.1% 30.6% p = 0.002 42.8% 28.0% p < 0.001 43.5% 34.5% p < 0.001 11.8% 9.7% 10.0% p = 0.083 11.2% 7.7% p = 0.022 12.7% 7.5% p < 0.001 13.4% 9.6% p < 0.001 30.5% 26.0% 29.9% p = 0.144 29.3% 25.0% p = 0.332 29.7% 26.8% p = 0.320 30.6% 27.9% p = 0.218 1.00 1.07 (0.93–1.23) 0.94 (0.78–1.13) p = 0.186 1.00 0.87 (0.70–1.09) p = 0.381 1.00 0.55 (0.47–0.65) p = 0.672 1.00 0.76 (0.67–0.87) p = 0.232 1682 Successful Quit Attempt 1.00 0.75 (0.59–0.97) 0.74 (0.53–1.04) 1.00 0.86 (0.69–1.07) 0.76 (0.57–1.02) p = 0.211 p = 0.096 1.00 0.69 (0.45–1.00) 1.00 0.72 (0.47–1.11) p = 0.218 p = 0.043** 1.00 0.67 (0.52–0.87) 1.00 1.02 (0.75–1.37) p = 0.460 p = 0.705 1.00 0.72 (0.59–0.88) 1.00 0.79 (0.63–1.01) p = 0.837 p = 0.926