Comparison 2. Controlled Trials.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Recidivism while the interlock device is installed in offender's vehicle	9		Risk Ratio (M‐H, Random, 95% CI)	Totals not selected
1.1 First time offenders (or not described)	5		Risk Ratio (M‐H, Random, 95% CI)	0.0 [0.0, 0.0]
1.2 Repeat offenders	8		Risk Ratio (M‐H, Random, 95% CI)	0.0 [0.0, 0.0]
2 Recidivism after the interlock device has been removed from the offender's vehicle	7		Risk Ratio (M‐H, Random, 95% CI)	Totals not selected
2.1 First time offenders (or not described)	3		Risk Ratio (M‐H, Random, 95% CI)	0.0 [0.0, 0.0]
2.2 Repeat offenders	7		Risk Ratio (M‐H, Random, 95% CI)	0.0 [0.0, 0.0]
3 Total recidivism during study period	2		Risk Ratio (M‐H, Random, 95% CI)	Totals not selected
3.1 First time offenders (or not described)	1		Risk Ratio (M‐H, Random, 95% CI)	0.0 [0.0, 0.0]
3.2 Repeat offenders	2		Risk Ratio (M‐H, Random, 95% CI)	0.0 [0.0, 0.0]