Cited by 64Traffic and Road SafetySleep and Work-Related FatigueSleep and related disorders

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

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Vorona, Robert Daniel, Szklo-Coxe, Mariana, Lamichhane, Rajan, Ware, J. Catesby, McNallen, Ann, Leszczyszyn, David·2014·Journal of Clinical Sleep Medicine

Abstract

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

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  1. [40]40. Private School Review. Henrico County Private Schools. http://www. privateschoolreview.com/county_private_schools/stateid/VA/county/51087.
  2. [41]41. Private School Review. Chesterfield County Private Schools. http://www. privateschoolreview.com/county_private_schools/stateid/VA/county/51041.

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Authors
Vorona, R. D., Szklo-Coxe, M., Lamichhane, R., Ware, J. C., McNallen, A., & Leszczyszyn, D.
Affiliations
  • Eastern Virginia Medical School (US)
  • Community and Environmental Health, Old Dominion University, Norfolk, VA
  • Texas A&M University – Kingsville (US)
  • South University, Richmond, VA
  • Virginia Commonwealth University (US)
Corresponding author
Vorona, Robert Daniel
Venue
Journal of Clinical Sleep Medicine
Published
2014-11-15
Volume
10
Issue
11
Pages
1169-1177
ISSN
  • 1550-9389 (ISSN-L)
  • 1550-9397
OpenAlex
W2066319209
Cited by
64
References
41
Citations by year
2026: 2 · 2025: 1 · 2024: 4 · 2023: 3 · 2022: 8 · 2021: 2 · 2020: 9 · 2019: 6 · 2018: 6 · 2017: 11 · 2016: 9 · 2015: 2 · 2014: 1
FWCI
19.42
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Sleep Medicine (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • ODU Digital Commons (Old Dominion University) (submittedVersion)
Funders
  • Virginia Commonwealth University
  • Old Dominion University
  • Eastern Virginia Medical School
Topics
  • Physical Sciences › Engineering › Safety, Risk, Reliability and Quality › Traffic and Road Safety
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
Keywords
school start time, sleep deprivation, run-off-road crashes, traffic congestion, Henrico County, Virginia, Chesterfield County, Virginia
MeSH terms
Accidents, Traffic, Adolescent, Adult, Age Factors, Automobile Driving, Circadian Rhythm, Cross-Sectional Studies, Female, Humans, Male, Schools, Sex Factors, Sleep Deprivation, Time Factors, Virginia, Incidence, Risk Assessment

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