Recidivism prevention for impaired driving: Longitudinal 5-year outcomes from Quebec's severity-based intervention...

Area of Science:

• Forensic Psychology
• Public Health
• Criminology

Background:

• Driving while impaired by alcohol (DWI) remains a significant societal issue.
• Tailoring interventions based on individual risk and needs (risk/needs) is a proposed strategy to improve outcomes and resource allocation.
• Quebec's mandatory, severity-based DWI intervention assignment program requires systematic evaluation.

Purpose of the Study:

• To test the hypotheses that higher-risk DWI offenders (DWI _R) have poorer outcomes than lower-risk offenders (DWI _F).
• To evaluate if matching higher risk/needs offenders to intensive intervention (II) and lower risk/needs offenders to brief intervention (BI) reduces recidivism.
• To assess the effectiveness of Quebec's severity-based intervention assignment program.

Main Methods:

• A longitudinal cohort study of 37,612 DWI drivers from 2012-2016, followed until 2018.
• Survival analysis was used to assess the predictive validity of initial risk classification (DWI _R vs. DWI _F) for recidivism.
• Logistic regression discontinuity evaluated intervention assignment effectiveness (II vs. BI) and explored interactions with age and sex.

Main Results:

• Drivers classified as higher risk (DWI _R) exhibited a 58% greater hazard of recidivism compared to lower-risk drivers (DWI _F).
• Intensive intervention (II) for higher risk/needs drivers reduced recidivism probability by 35%, while brief intervention (BI) for lower risk/needs drivers reduced it by 57%.
• Younger age was a stronger predictor of recidivism risk in DWI _F than DWI _R drivers.

Conclusions:

• Quebec's severity-based approach effectively identifies DWI drivers at higher risk of recidivism.
• Higher-risk offenders benefit from prompt intervention, and those with greater risk/needs show reduced recidivism when assigned to intensive interventions.
• The findings support tailored intervention strategies for managing DWI offenders.