Trends in female and male drunken driving prevalence over thirty years: Triangulating diverse sources of evidence (1985-2015).

INTRODUCTION: Women have lower rates of drunken driving than men, but their share of arrests has been climbing since 1985. These trends may stem from changes in women's lives that lead to more drinking and driving, or to greater reductions in male drinking and driving. Alternatively, changes in policy and enforcement that focus on less intoxicated offenders may inadvertently target female-typical offending patterns. This paper tracked male and female drunken driving rates and the DUI sex ratio in the United States from 1985 to 2015 across three data sources.
METHODS: The sex ratio and prevalence estimates were derived from official arrest statistics from Uniform Crime Reports, self-reports from the Centers for Disease Control and Prevention, and traffic fatality data from the National Highway and Transportation Safety Administration. Rates were assessed for four age groups (18-20, 21-34, 35-49, and 50-64), and drunken driving trends tested using Augmented Dickey-Fuller time-series methods.
RESULTS: Decreases in DUI rates stagnated over the first decade of 2000, but have again begun to decline, according to self-reports and traffic fatality data, for all sex-by-age groups. Still, the gender gap in DUI arrests continues to narrow. From 1990 to the early 2000s, changes in social control that made female DUI more visible narrowed the gender gap in arrests. In more recent years, narrowing of the gap is due primarily to male rates declining more steeply than female rates.
CONCLUSION: Results indicate that we need more research to understand why female declines have not kept pace with male declines and perhaps more targeted prevention efforts aimed at women.