“…Both cross-sectional analyses and longitudinal studies have found depression to be a risk factor for as well as a result of smoking (Brown, et al, 1996; Simons-Morton, 2002; Windle & Windle, 2001). Similarly, conduct problems have been found to increase an adolescent’s risk of early smoking initiation, current smoking, and the development of nicotine dependence (Chilcoat & Breslau, 1999; Lambert & Hartsough, 1998; Milberger, Biederman, Faraone, Chen, & Jones, 1997; Ramsey et al, 2003; Riggs, Mikulich, Whitmore, & Crowley, 1999; Upadhyaya, et al, 2003). …”