We also considered the effects of additional baseline risk factors for SROs, focusing on risk factors that have been documented in the literature as potential determinants of the relationship between smoking and SROs.2, 17, 18 These included socio-demographic controls, baseline measures that might most reasonably be conceptualized as common causes of respondent smoking and SROs (parental history of common mental-substance disorders, other respondent childhood adversities), and baseline measures that might possibly be mediators of the effects of smoking on SROs (respondent lifetime of DSM-III-R mental disorders, history of substance use, history of treatment for mental-substance problems). We also controlled for baseline history of SROs to distinguish first onsets from recurrences in the intervening decade. As the results of analyses using these controls to predict the outcomes considered here have been reported previously,31 they are not discussed in the current report.
