More precisely, the goals of the outcome evaluation were: >. To determine the effectiveness of the program to reduce drink driving when combined with counselling and other Addiction Services components provided to the offender; > T o identify potential improvements to the program or implementation of the program; >. To determine the use of the program, e.g., participation rates and attrition. [...] More precisely, the goals of the outcome evaluation were: > T o determine the effectiveness of the program in reducing drink driving when combined with counselling and other Addiction Services components provided to the offender; > T o identify potential improvements to the program or implementation of the program; and, >. To determine the use of the program, e.g., participation rates and attritio [...] The data contained information for each participant in the interlock program, the date of installation of the interlock device, a list of events with the date/time of each interlock event and the type of the event during their participation in the program. [...] The table below shows the percentage of participants in each group that had convictions after their inclusion in the study (interlock device installation date for the interlock groups, registration date in the group for the voluntary-control and offence date for the mandatory-control group) and after removal of the interlock device for the interlock groups. [...] Therefore, these analyses examined the impact of the program from the time of device installation until the end of the study (i.e., including time after removal of the device until the end of the study).