https://trid.trb.org/ en-us Copyright © 2026. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) https://trid.trb.org/Images/PageHeader-wTitle.jpg https://trid.trb.org/ https://trid.trb.org/View/2645535 Thu, 15 Jan 2026 14:31:02 GMT https://trid.trb.org/View/2645535 https://trid.trb.org/View/2611419 =65 yr]: 15.3%). The mean (standard deviation) age was 43 (19), and 69% were male. The median (interquartile range) Injury Severity Score was 9 (4-14). The median Glasgow Coma Scale score was 15, and 20% had a Glasgow Coma Scale score of less than 15 on presentation. Overall, 65.8% of the victims were car drivers, followed by motorcyclists (25%), heavy transport vehicle drivers (8.6%), and three-wheeled motor vehicle riders (0.5%). The drug or alcohol screening test was positive in 28.8% of drivers, with 36.3% of them testing positive for more than one substance. Overall, alcohol was the most common substance found (47.1%), followed by marijuana (41.6%), and amphetamines (16.3%). Among those with positive screen tests, 52.9% tested positive for drugs other than alcohol, around two-thirds (59.2%) of which tested positive for marijuana. Trend analysis indicated that the incidence of substance abuse-related MVCs increased significantly from 27% in 2017 to 32% in 2020 (P < 0.001), with the most notable rise in cannabis-abuse-related MVCs (2017:10.2%; 2020:14.6%, P < 0.001). Subanalysis of different age groups demonstrated the same trend toward increasing DUI-related MVCs, with the most prominent rise in the prevalence of marijuana-positive MVC drivers among adolescents. Despite policies in place for the prevention of DUI, the prevalence of drug- or alcohol-related MVCs has been increasing over the years, with over one-third of MVC drivers having a positive drug screen on admission in 2020. This surge was even more prominent among adolescents with positive marijuana screen. These findings provide essential epidemiological data as to the prevalence of DUI, which will further inform policymakers to prevent DUI-related MVCs.]]> Fri, 05 Dec 2025 17:12:09 GMT https://trid.trb.org/View/2611419 https://trid.trb.org/View/2619198 Fri, 05 Dec 2025 14:07:17 GMT https://trid.trb.org/View/2619198 https://trid.trb.org/View/2550834 Thu, 05 Jun 2025 11:59:53 GMT https://trid.trb.org/View/2550834 https://trid.trb.org/View/2431544 Tue, 17 Sep 2024 14:49:44 GMT https://trid.trb.org/View/2431544 https://trid.trb.org/View/2418294 Mon, 26 Aug 2024 14:44:26 GMT https://trid.trb.org/View/2418294 https://trid.trb.org/View/2413999 Thu, 15 Aug 2024 09:28:20 GMT https://trid.trb.org/View/2413999 https://trid.trb.org/View/2387222 Wed, 26 Jun 2024 14:16:48 GMT https://trid.trb.org/View/2387222 https://trid.trb.org/View/2301845 Fri, 05 Apr 2024 09:03:15 GMT https://trid.trb.org/View/2301845 https://trid.trb.org/View/2353860 Mon, 25 Mar 2024 17:12:49 GMT https://trid.trb.org/View/2353860 https://trid.trb.org/View/2352881 Thu, 21 Mar 2024 13:24:06 GMT https://trid.trb.org/View/2352881 https://trid.trb.org/View/2352882 Thu, 21 Mar 2024 13:24:06 GMT https://trid.trb.org/View/2352882 https://trid.trb.org/View/2304642 Wed, 27 Dec 2023 17:08:12 GMT https://trid.trb.org/View/2304642 https://trid.trb.org/View/2286734 Tue, 28 Nov 2023 10:39:02 GMT https://trid.trb.org/View/2286734 https://trid.trb.org/View/2256588 Wed, 15 Nov 2023 09:19:57 GMT https://trid.trb.org/View/2256588