For parental problematic substance use, 9.6 % of students indicated that their mother's use was problematic and 26.9 % indicated their father's use was problematic. The lifetime prevalence of adolescent substance use for the entire sample was 65.7 % for alcohol, 22.1 % for cigarettes, 31.3 % for marijuana, 4.8 % for inhalants, 4.1 % for ecstasy, and 10.5 % for prescription drugs. These rates are similar to those found in nationally representative samples of 9th and 10th grade adolescents (e.g., Johnston et al., 2010). In addition, at the time of the study, 44.4 % of adolescents were living with their mother and father, 25 % with their mother only, 20.7 % with one parent and a step-parent, 3.5 % with their father only, 3 % with grandparents, and 3.3 % with someone else (i.e., “other”). The lifetime prevalence of substance use, as well as parental problematic substance use, did not differ between 9th and 10th grade students. We also created a sum variable of all types of lifetime substance use to examine the correlation between adolescent and problematic parental
