Findings indicate that the self-help home alcohol, tobacco, and other drugs (ATOD) communication intervention appeared to have significantly enhanced reported tobacco- and alcohol-related parent-child communication. Parents in the intervention group reported being more likely than those in the comparison group to have talked about alcohol and tobacco with their children, have talked more recently and have higher parent-child engagement during such discussions, and were more likely to have discussed topics known to the protective of children’s involvement in the use of tobacco and alcohol. Additionally intervention group parents reported having alcohol-related discussions of longer duration. Data were collected from 1,201 parents of 10- to 11-year-old children who were recruited from 20 schools in Perth, Western Australia. Tables and references