“…Descriptive information on samples of adolescent AAI patients in ED provide little reference on subgroups of risky drinkers, since they traditionally report means of one-dimensional measures for the entire sample and hereby obscure patterns of variable endorsement relevant for identifying high risk subgroups. For example, Stolle, Sack, Bröning, Baldus, and Thomasius (2013) reported a percentage of 68.2% of 12-21 year olds treated for AAI in an ED to screen positive for risky alcohol use in the RAFFT alcohol screening test, whereas Müller et al (2009) reported 24.2% of 11-17 year olds treated for AAI in an ED to consume 5 or more standard drinks on a typical drinking day and Reis, Pape, and Hassler (2009) found 23.4% regular alcohol users (at least weekly) in a similar sample of 10-17 year olds. These studies all report percentages between 11.3% and 15.9% of youth with repeated hospitalizations due to AAI, a characteristic certainly indicating repeated high-risk drinking, but the data from these studies also show the difficulty of determining "risky drinking" by a single indicator.…”