Journal article
A GIS-based Matched Case-control Study of Road Characteristics in Farm Vehicle Crashes
Epidemiology (Cambridge, Mass.), Vol.27(6), pp.827-834
11/01/2016
DOI: 10.1097/EDE.0000000000000542
PMID: 27468005
Abstract
Background: Farm vehicle-related crashes (crashes) are hazardous for farm and non-farm vehicle users; however, most studies examine risk factors of injury given a crash, and shed little light on risk factors of crashes. We evaluated the association of road sinuosity and gradient with crashes in nine Midwestern States from 2005 to 2010.
Methods: We collected crash data from the state departments of transportation, and road segment data from the Environmental Sciences Research Institute. We measured gradient and sinuosity of road segments using ArcGIS. A road segment with a crash was defined as a case (n = 6,848), and that without a crash was defined as a control. Controls were matched to cases by ZIP code, road type, and length in 1: 1 (controls = 6,808) matching scheme. In addition, a 1: many control matched scheme was employed such that all road segments adjacent to the case would serve as controls (n = 24,390). We computed odds ratios (OR) and 95% confidence intervals (CIs) using multivariable conditional logistic regression.
Results: The adjusted OR of a crash on a road segment with 6%-10% gradient was 0.60 (95% CI: 0.49, 0.75) as compared with a leveled (<1% gradient) road segment. Compared with a straight (<1% sinuosity) road segment, the adjusted OR of a crash on a road segment with 6%-10% sinuosity was 0.38 (95% CI: 0.29, 0.52).
Conclusions: Roads with increased gradient and sinuosity had fewer farm crashes. These associations may be due to cautious driving behaviors on curvy or steep roads and road side signage alerting drivers of impending curve or grade.
Details
- Title: Subtitle
- A GIS-based Matched Case-control Study of Road Characteristics in Farm Vehicle Crashes
- Creators
- Shabbar I. Ranapurwala - University of IowaElizabeth R. Mello - University of IowaMarizen R. Ramirez - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Epidemiology (Cambridge, Mass.), Vol.27(6), pp.827-834
- Publisher
- Lippincott Williams & Wilkins
- DOI
- 10.1097/EDE.0000000000000542
- PMID
- 27468005
- ISSN
- 1044-3983
- eISSN
- 1531-5487
- Number of pages
- 8
- Grant note
- advisory council of the Great Plains Center for Agricultural Health 26305025 / Grants-in-Aid for Scientific Research; Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT); Japan Society for the Promotion of Science; Grants-in-Aid for Scientific Research (KAKENHI) U50OH007548 / NATIONAL INSTITUTE FOR OCCUPATIONAL SAFETY AND HEALTH; United States Department of Health & Human Services; Centers for Disease Control & Prevention - USA; National Institute for Occupational Safety & Health (NIOSH)
- Language
- English
- Date published
- 11/01/2016
- Academic Unit
- Occupational and Environmental Health; Epidemiology
- Record Identifier
- 9984282466202771
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