“…A more dramatic increase in 30-day use was observed for females (2.7%-11.6%) when compared to males (11.5%-17.4%) (Medina-Mora Address correspondence to Jaime M. Booth, Arizona State University, Phoenix, AZ, USA; E-mail: jmbooth2@asu.edu et al, 2012). In Jalisco, Mexico, gender gaps in substance use have been consistent with the national averages in the past decade (Medina-Mora, Borges, Muñiz, Benjet, & Jaimes, 2003;Ortiz, Soriano, Meza, Martinez, & Galván, 2006); however, emerging evidence suggests that adolescent Mexican females are using substances at the same (Villatoro et al, 2009) or at higher rates than their male counterparts (Marsiglia et al, 2012). These trends may be a function of substance offers and availability.…”