first postcessation session but reported complete abstinence on every day thereafter. Two of the abstainers lapsed and smoked a single cigarette during the study. Although the never-quitters were unable to stop smoking, they appeared to have tried to quit and had, on average, reduced their daily smoking rate significantly from baseline by 57% at 1–2 days postcessation. However, by 3–5 days postcessation, never-quitters have returned to smoking at a rate similar to that recorded at baseline. Among the relapsers, the majority of them (11 out of 19) relapsed and resumed regular smoking after they had attended their first postcessation laboratory session, typically scheduled between 1 and 2 days after their scheduled quit date (see Table 3). Another subgroups of relapsers (6 out of 19) did not resumed regular smoking until after they had attended their second postcessation laboratory session, typically scheduled between 3 and 5 days after their scheduled quit date. One relapser, who had not yet quit during the first postcessation visit, achieved smoking abstinence by the second visit but relapsed and reported to be smoking regularly at the third and final visit. One relapser who had quit on the scheduled quit date relapsed at the second session, but
