title: Comparison between two quasi-induced exposure methods for studying risk factors for road crashes.
abstract: This study was designed to compare estimates from two quasi-induced exposure methods of the effects of driver- and vehicle-related conditions on the risk of causing a road crash for drivers of vehicles with four or more wheels. From the Spanish register of road crashes with victims, the authors selected, for 1993-2002, all 755,329 drivers of >or=4-wheeled vehicles involved in single-vehicle crashes or in two-vehicle collisions in which only one of the drivers was considered responsible. Multinomial and logistic regression models were used to obtain the odds ratio for each driver- and vehicle-related variable. Construction of these models was based on the assumptions of classical quasi-induced exposure methods and on the method (a paired-by-collision analysis of responsible and nonresponsible drivers) proposed by Perneger and Smith (Am J Epidemiol 1991;134:1138-45). The main driver-dependent conditions for any type of crash were psychophysical circumstances (alcohol use and sleepiness). The effect of most driver- and vehicle-related characteristics was higher for single-vehicle crashes than for two-vehicle collisions. Furthermore, both classical and paired-by-collision analyses yielded similar estimates and can be considered equally useful alternatives for assessing the effect of driver and vehicle characteristics on the risk of causing a collision between two vehicles.
authors.affiliation: Department of Preventive Medicine and Public Health, Faculty of Pharmacy, University of Granada, Granada, Spain. lardelli@ugr.es
authors.forename: Pablo
authors.initials: P
authors.lastname: Lardelli-Claret
authors.forename: José Juan
authors.initials: JJ
authors.lastname: Jiménez-Moleón
authors.forename: Juan de Dios
authors.initials: Jde D
authors.lastname: Luna-del-Castillo
authors.forename: Miguel
authors.initials: M
authors.lastname: García-Martín
authors.forename: Obdulia
authors.initials: O
authors.lastname: Moreno-Abril
authors.forename: Aurora
authors.initials: A
authors.lastname: Bueno-Cavanillas
mesh_terms: D000063:Accidents, Traffic / Q000706:statistics & numerical data*; D000293:Adolescent; D000328:Adult; D000368:Aged; D015986:Confounding Factors, Epidemiologic; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D018570:Risk Assessment; D012307:Risk Factors; D013030:Spain / Q000453:epidemiology