Finally, SUD are not only a frequent consequence of CAN, but also belong to the most important risk factors for the perpetration of CAN. Studies of court registers indicate that about 40–60% of all significant CAN cases involve parents with substance use problems. A variety of factors seem to enhance the risk for CAN in families with SUD. Findings include dysfunctional internal and external boundaries, poor communication skills, high family conflict levels, and low levels of family competence (Vernig, 2011). One of the best-established hypotheses focuses on ‘disinhibition’ caused by active use of substances. Though under-studied so far, ER is emerging as another predictor for CAN among individuals with SUD. ER deficits can be linked to both addictive and aggressive behaviours (Simons & Carey, 2002) and they exceeded other diagnostic and demographic variables in predicting CAN among individuals with SUD (Hien, Cohen, Caldeira, Flom, & Wasserman, 2010). A prerequisite for efforts to prevent CAN by parents with SUD is effective screening of individuals at risk. The existing attempts to develop specific instruments for SUD populations, however, share some methodological shortcomings.