Adolescent crash rates and school start times in two central Virginia counties, 2009-2011: a follow-up study to a southeastern Virginia study, 2007-2008.

摘要: BACKGROUND AND OBJECTIVE: Early high school start times (EHSST) may lead to sleep loss in adolescents, thus resulting higher crash rates. (Vorona et al., 2011). In this study, we examined two other adjacent Virginia counties for the years subsequent above-mentioned study. We again hypothesized that teens from jurisdictions with EHSST (versus later) experience METHODS: Department of Motor Vehicles supplied de-identified aggregate data on weekday crashes and time-of-day 16-18 year old (teen) adult drivers 2009-2010 2010-2011 Henrico Chesterfield Counties. Teen rates early versus later start-times were compared using two-sample Z-tests these pair-wise tests. RESULTS: manifested a statistically rate 48.8/1000 licensed Chesterfield's 37.9/1000 (p = 0.04) 2009-2010. For 2010-2011, HC 16-17 demonstrated significant (53.2/1000 42.0/1000), while similar trend was found, albeit nonsignificant 0.09). Crash peaks occurred 1 hour earlier morning 2 hours afternoon Chesterfield, consistent commute times. Post hoc analyses found significantly more run-off road right (potentially sleep-related) teens. Adult traffic congestion did not differ between counties. CONCLUSIONS: Higher teen EHSST, as our prior This study contributes extends existing preventable Language: en