The Australian National Council on Drugs recently released a report entitled "Drug use in the family: impacts and implications for children".  According to the ANCD's media release, one of the major findings of this report is that families with a parent that has substance abuse problems are also families that face other challenges such as mental illness, poverty, abuse & neglect for instance.

The report can be downloaded from http://www.ancd.org.au/publications/pdf/rp13_drug_use_in_family.pdf.