“…Despite the well-known risks of smoking, it is estimated that approximately 37.8 million Americans (15.5% of adults) continue to smoke, and the percentage who smoke is significantly greater among people with “severe psychological distress” (35.8%) than among people without such distress (14.7%) (Jamal et al, 2018). Associations have been established between cigarette smoking and many psychiatric conditions, including the development of several psychiatric disorders (Covey et al, 1998; Gurillo et al, 2015; Hersi et al, 2017; Isensee et al, 2003; Luger et al, 2014; Moylan et al, 2012), suicidality (Aubin et al, 2011; Baek et al, 2013; Goodwin et al, 2013; Li et al, 2012; Poorolajal and Darvishi, 2016), clinical course (Bakhshaie et al, 2015, 2016; Ezquiaga et al, 2014; Graff et al, 2008; Ostacher et al, 2006), and retention in psychiatric treatment (Ezquiaga et al, 2014; Graff et al, 2008; Ostacher et al, 2006), although the causes and mechanisms of these associations are not well understood.…”