Factor Structure of the Brief Addiction Monitor in a Non-Veteran Substance Use Disorder Outpatient Treatment Sample.

ABSTRACT

Background: The Brief Addiction Monitor (BAM) was developed as a comprehensive substance use disorder (SUD) outcome metric to fill a gap in quality measurement. Research to date has only examined the psychometric performance of this measure in veteran SUD populations. The purpose of the current research is to examine the factor structure and validity in a non-veteran SUD population. Methods: Non-veteran patients admitted to a SUD treatment program (N = 2,227) completed BAM at intake. After confirmatory factor analysis (CFA) was performed to evaluate the measurement model validity of previously defined latent structures, exploratory factor analysis (EFA) was used to assess the factor structure and psychometric properties of the BAM within the full sample and within subgroups, specifically racial, referral source (mandated vs. not), and primary SUD diagnosis. Results: Exploratory factor analyses in the full sample supported a 4-factor model (representing Stressors, Alcohol Use, Risk Factors, and Protective Factors) derived from 13 items. Subsequent EFAs conducted separately in each subgroup revealed variability in the number of resulting factors and pattern matrices. The internal consistency also varied among factors and between subgroups; in general, reliability was greatest for the Alcohol Use scale and either poor or questionable for pattern matrices resulting in scales reflecting Risk or Protective Factors. Conclusion: Findings from our study suggest that the BAM might not be a reliable and valid instrument for all populations. More research is needed to develop and validate tools that are clinically meaningful and allow clinicians to track recovery progress over time.