Table 3 Confirmed sustained abstinence†.

	Basic* (n = 469)	Weekly* (n = 456)	Risk difference (95% CI)	OR (95% CI)
1 week	148 (316)	196 (43.0)	11.6 (5.4 to 17.8)	1.65 (1.26 to 2.16)
4 weeks	105 (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)

*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.