A confirmatory approach to understanding the four-factor structure of the Adolescent Drinking Index: evidence for a brief version.

The purpose of this study was to examine the psychometric properties of the original version of the Adolescent Drinking Index (ADI), and to examine the fit of a series of confirmatory factor analysis models to arrive at an abbreviated version that can be easily administered in settings with limited time for assessment. These aims were examined in a sample of 740 adolescents (Mage=15.26; 58.5% males) who completed the ADI during an emergency department visit. Results suggested that the four-domain design did not fit the data adequately. Results, however, demonstrated good fit for an 8-item adapted version with a four-factor structure: interpersonal, social, psychological, and physical indicators. This abbreviated version was also associated with outcomes such as hangover, alcohol withdrawal, and substance use. Findings from this study provide support for the use of an abbreviated version of the ADI for screening adolescents and referring them to appropriate interventions.