“…In a review of the literature, only one study indicated that early age of alcohol use was associated with later IDU (Corsi, Winch, Kwaitkowski, & Booth, 2007) and one study indicated that the age of first alcohol use was significantly younger for injection drug users compared with non-injection drug users (Sherman et al, 2005). In addition, research has suggested that early onset of alcohol-related disorders may predict the use of heavier drugs (Golub & Johnson, 2001; Merrill, Kleber, Shwartz, Liu, & Lewis, 1999) as well as alcohol abuse/dependence or other drug dependence (Chen, Storr, & Anthony, 2009; Dawson, Goldstein, Chou, Ruan, & Grant, 2008; Grant, 1998; Grant & Dawson, 1997; Grant, Stinson, & Harford, 2001; King & Chassin, 2007) later in life.…”