Table 3

 Confirmed sustained abstinence†

Basic*(n = 469)Weekly*(n = 456)Risk difference (95% CI)OR (95% CI)
*Values presented as n (%).
†Allows a grace period of smoking before visit 2 providing visit 2 took place within 14 days of quit day.
‡No participants were taking nicotine replacement therapy at any of these follow-up points.
1 week148 (316)196 (43.0)11.6 (5.4 to 17.8)1.65 (1.26 to 2.16)
4 weeks105 (22.4)102 (22.4)0.1 (−5.3 to 5.5)1.00 (0.74 to 1.37)
12 weeks‡66 (14.1)52 (11.4)−2.6 (−6.9 to 1.7)0.79 (0.54 to 1.17)
26 weeks‡50 (10.7)40 (8.8)−1.9 (−5.7 to 2.0)0.81 (0.52 to 1.25)
52 weeks‡36 (7.7)30 (6.6)−1.1 (−4.4 to 2.3)0.85 (0.51 to 1.41)