Table 5

 Treatment effects for smoking cessation at 12 and 26 weeks

Control n (%)Active n (%)RR (95% CI)p Value
*All participants with missing smoking status assumed to be smoking.
†All participants with missing smoking status assumed to be not smoking.
‡24 week continuous complete abstinence assessed at 26 weeks.
§24 week continuous abstinence but with three or fewer “lapses” of two or fewer cigarettes per lapse.
Results at 12 weeks
Missing status: assumed smoking*160 (18.8)247 (29.0)1.55 (1.30 to 1.84)<0.0001
Missing status: assumed not smoking†225 (26.4)353 (41.4)1.57 (1.37 to 1.80)<0.0001
Results at 26 weeks
Missing status: assumed smoking*202 (23.7)216 (25.4)1.07(0.91 to 1.26)0.4
Missing status: assumed not smoking†381 (44.7)477 (56.0)1.25 (1.14 to 1.38)<0.0001
Missing status: last value carried forward233 (27.3)298 (35.0)1.20 (1.08 to 1.34)0.0006
Number abstaining completely‡26 (3.1)39 (4.6)1.50 (0.92 to 2.44)0.1
Number abstaining§39 (4.6)64 (7.5)1.64 (1.12 to 2.42)0.01