Colorado.
Methods | Longitudinal study. | |
Participants | Repeat offenders. 501 interlock participants and 349 did not installs. | |
Interventions | Offenders had to have applied for an Interlock Probationary Licence. Participation was voluntary. Sept 1998 ‐ Oct 2000. | |
Outcomes | Recidivism rates while the interlock was installed in the vehicle and for one year following the removal of the device. | |
Notes | Program managed by the Hearings Section of the Colorado Department of Revenue. Interlock applicants were older, had higher family income, were non‐hispanic whites and had at least a high school or equivalent education than non‐applicants. Quality assessment score 16/27 | |
Risk of bias | ||
Bias | Authors' judgement | Support for judgement |
Allocation concealment? | Unclear risk | D ‐ Not used |