Author
Tania Fredericksen
Bio: Tania Fredericksen is an academic researcher from Victoria Police. The author has contributed to research in topics: Occupational safety and health & Injury prevention. The author has an hindex of 1, co-authored 1 publications receiving 7 citations.
Papers
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TL;DR: This study documents the prevalence of positive tests for alcohol and a large number of drugs in drivers taken to Victorian hospitals for injuries over a five-year period, with methylamphetamine the most prevalent illicit drug and THC the highest prevalence.
Abstract: This study documents the prevalence of positive tests for alcohol and a large number of drugs in drivers taken to Victorian hospitals for injuries over a five-year period. Blood specimens w...
12 citations
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TL;DR: Culpability analysis was conducted on 5000 drivers injured as a result of a vehicular collision and in whom comprehensive toxicology testing in blood was conducted, finding that drivers that had combinations of impairing drugs generally gave a large increase in odds.
45 citations
TL;DR: In a recent study, this paper examined how the presence of alcohol and other drugs in fatal road trauma in Victoria has changed over time in different road users and found that a decline in the prevalence of alcohol in fatalities suggests that law enforcement and public health strategies in Australia to address road fatalities and drink-driving may have had a positive effect.
15 citations
TL;DR: A novel biochemical-physiological-behavioural pathway is proposed which delineates how amphetamine use critically alters oculomotor function, visual-attentional performance and information processing capabilities and recommends oculography as a novel means of detecting and monitoring gaze behaviours during naturalistic tasks such as driving.
10 citations
TL;DR: “left-over” blood taken as part of routine medical care is used to quantify cannabis and other drugs in non-fatally injured drivers who present to participating emergency departments after a collision to monitor the prevalence and pattern of drug use in injured drivers across Canada.
Abstract: Drug driving is an emerging global road safety problem. As the prevalence of alcohol-impaired driving decreases, and as more jurisdictions decriminalize or legalize cannabis, it is increasingly important for policy makers to have accurate information on the prevalence and pattern of drug driving. Unfortunately, this data is not widely available and the World Health Organization identifies lack of accurate data on the prevalence of drug driving as an important knowledge gap. In this paper, we discuss the limitations of current methods of monitoring drug use in drivers. We then present a novel methodology from a multi-centre study that monitors the prevalence and pattern of drug use in injured drivers across Canada. This study uses “left-over” blood taken as part of routine medical care to quantify cannabis and other drugs in non-fatally injured drivers who present to participating emergency departments after a collision. Toxicology testing is done with waiver of consent as we have procedures that prevent results from being linked to any individual. These methods minimize non-response bias and have the advantages of measuring drug concentrations in blood obtained shortly after a collision. Our methods can be applied in other jurisdictions and provide a consistent approach to collect data on drug driving. Consistent methods allow comparison of drug driving prevalence from different regions. Data from this research can be used to inform policies designed to prevent driving under the influence of cannabis and other impairing drugs.
7 citations
TL;DR: In this article , positive oral fluid test results may indicate recent cannabis use because test sensitivity is usually limited to a few hours after smoking (the time depending upon the detection threshold of the device).
Abstract: Positive oral fluid test results may indicate recent cannabis use because test sensitivity is usually limited to a few hours after smoking (the time depending upon the detection threshold of the device). 9 THC in oral fluid primarily represents coating of the mouth after inhalation of drug-laden smoke or vapour. It is not associated with THC concentrations in blood or driver performance. 2 Two to four hours after cannabis intake, coating of the oral fluid dissipates and oral fluid THC concentrations approximately parallel blood THC concentrations, but not at the same levels. 10 We cannot accurately predict blood concentrations of THC from oral fluid concentrations because of high intra-subject and inter-subject variability. 11
3 citations