This study has several limitations. This population may not be representative of all DWI offenders. Since data are self reported, the information is subject to errors in memory, underreporting, and misjudgment. The SUD diagnosis was not confirmed by clinicians, another limitation. With respect to DOL, the low percentage of subjects reporting this behavior limits the power to detect risk factors associated with this outcome. Finally our models did not measure the many other intervening factors over the 15 years of follow-up that may have influenced outcomes.
