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Liability to substance use disorders: 2. A measurement approach
Michael M Vanyukov1, Levent Kirisci, Ralph E Tarter
1Department of Pharmaceutical Sciences, Center for Education and Drug Abuse Research, University of Pittsburgh, 707 Salk Hall, Pittsburgh, PA 15261, USA. mmv@pitt.edu
Neuroscience and Biobehavioral Reviews
|November 6, 2003
Summary
This study introduces a new method to measure the risk for substance use disorders (SUD) using a continuous liability index. This approach allows for early risk estimation before drug exposure, aiding genetic studies and prevention efforts.
Area of Science:
- Psychiatry
- Genetics
- Psychometrics
Background:
- Complex disorders, like substance use disorders (SUD), are difficult to measure due to arbitrary diagnostic thresholds.
- Quantifying SUD risk is crucial for understanding etiological mechanisms and developing interventions.
Purpose of the Study:
- To develop a continuous index for quantifying liability to substance use disorders (SUD).
- To apply item response theory and a longitudinal family/high-risk design for liability assessment.
- To enable early and pre-exposure risk estimation for SUD.
Main Methods:
- Utilized item response theory (IRT) and a longitudinal family/high-risk design.
- Developed a continuous index to measure liability to substance use disorders (SUD).
- Validated the method through simulation studies and analysis of empirical data.
Main Results:
- Successfully developed and tested a method for creating a continuous liability index for SUD.
- Demonstrated the ability to quantitatively estimate SUD risk at an early age, prior to drug exposure.
- The approach proved effective in both simulated and real-world data.
Conclusions:
- The developed method offers a quantitative approach to estimating early-life risk for substance use disorders (SUD).
- This continuous liability index is valuable for etiological research, including genetic studies.
- The methodology is adaptable for assessing liability to other complex disorders with later onset.