“…The search located six controlled trials, including one unpublished trial by the author and colleagues (Mullen, DiClemente, et al, 1997). Three trials (Petersen, Handel, Kotch, Podedworny, & Rosen, 1992;Secker-Walker et al, 1995;SeckerWalker, Solomon, Flynn, Skelly, & Mead, 1998) were not selected because they were aimed primarily at preventing smoking relapse during pregnancy by spontaneous quitters (also called baseline quitters). In addition, their reports of relapse postpartum appeared to include all spontaneous quitters in the denominator, regardless of smoking status in late pregnancy.…”