Research Reports - Roadway aggression among drivers and passengers with or without a history of traumatic brain injury

Violence Vict. 2017 Aug 15. doi: 10.1891/0886-6708.VV-D-16-00027. [Epub ahead of
print]

Ilie G(1), Wickens C(2), Mann R(2), Ialomiteanu A(1), Adlaf E(1), Hamilton H(1),
Asbridge M(3), Rehm J(1), Cusimano M(4).

OBJECTIVE: This study examined the association between roadway aggression and
traumatic brain injury (TBI) among drivers and passengers who reside in the
province of Ontario, Canada.
METHODS: Data were based on a 3-year cumulated cross-sectional sample of 6,048
adults aged 18 years and older who were surveyed by telephone. The outcome in
this study was road rage in the form of verbal/gestural or physical aggression
toward other road users and/or their vehicle.
RESULTS: Driving status, history of TBI, age, gender, education, and the
interaction between history of TBI and education significantly predicted roadway
aggression. Odds ratios (ORs) for roadway aggression were significantly higher
among drivers (OR = 2.65) compared to passengers, between 2 and 4.5 times higher
among individuals aged 18-64 years old compared to those older than 65 years,
higher among adults with TBI (OR = 2.05) than without, and men (OR = 1.54) than
women. Among respondents with lowest, but not highest, levels of education,
roadway aggression was predicted by a history of TBI.
CONCLUSION: This is the first population-based study to compare rates of roadway
aggression between drivers and passengers with and without TBI. Research to
understand these differences will be important for roadway aggression prevention
efforts and policy. 

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