“…Globally, it is estimated that in 2013, approximately 246 million (i.e., one person in every 20 people) aged between 15 and 64 years used drugs, approximately 200,000 users died, one in 10 suffered from a drug-related health issue (e.g., hepatitis C, tuberculosis, endocarditis, paranoia, suicide ideation, schizophrenia, borderline personality disorder), and 41% engaged in high-risk sexual behaviors (Shi et al, 2015; Straussner & Fewell, 2015; United Nations Office on Drugs and Crime, 2015). In Australia, the country where this study was conducted, approximately 10% of all children live in households where parental drug or alcohol use is problematic, and 50% to 80% of parents who come to the notice of child protection workers have substance-use issues (i.e., the misuse of alcohol, prescription, and illicit drugs) (Hamilton, 2015; Olsen, 2015). The existing parallel body of criminological literature reveals that 62% to 87% of people arrested for criminal offenses test positive for drugs (Calhoun, Conner, Miller, & Messina, 2015).…”