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The relationship between performance on the standardised field sobriety tests, driving performance and the level of Delta9-tetrahydrocannabinol (THC) in blood.
Forensic Sci Int. 2005 Dec 20; 155(2-3):172-8.FS

Abstract

The consumption of Delta9-tetrahydrocannabinol (THC) as cannabis has been shown to result in impaired and culpable driving. Testing drivers for the presence of THC in blood is problematic as THC and its metabolites may remain in the blood for several days following its consumption, even though the drug may no longer have an influence on driving performance. In the present study, the aim was to assess whether performance on the standardised field sobriety tests (SFSTs) provides a sensitive measure of impaired driving behaviour following the consumption of THC. In a repeated measures design, 40 participants consumed cigarettes that contained either 0% THC (placebo), 1.74% THC (low dose) or 2.93% THC (high dose). For each condition, after smoking a cigarette, participants performed the SFSTs on three occasions (5, 55 and 105 min after the smoking procedure had been completed) as well as a simulated driving test on two occasions (30 and 80 min after the smoking procedure had been completed). The results revealed that driving performance was not significantly impaired 30 min after the consumption of THC but was significantly impaired 80 min after the consumption of THC in both the low and high dose conditions. The percentage of participants whose driving performance was correctly classified as either impaired or not impaired based on the SFSTs ranged between 65.8 and 76.3%, across the two THC conditions. The results suggest that performance on the SFSTs provides a moderate predictor of driving impairment following the consumption of THC and as such, the SFSTs may provide an appropriate screening tool for authorities that wish to assess the driving capabilities of individuals suspected of being under the influence of a drug other than alcohol.

Authors+Show Affiliations

Swinburne Centre for Neuropsychology, Swinburne University of Technology, PO Box 218, Hawthorn, Vic. 3122, Australia. kpapafotiou@swin.edu.auNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

16226154

Citation

Papafotiou, K, et al. "The Relationship Between Performance On the Standardised Field Sobriety Tests, Driving Performance and the Level of Delta9-tetrahydrocannabinol (THC) in Blood." Forensic Science International, vol. 155, no. 2-3, 2005, pp. 172-8.
Papafotiou K, Carter JD, Stough C. The relationship between performance on the standardised field sobriety tests, driving performance and the level of Delta9-tetrahydrocannabinol (THC) in blood. Forensic Sci Int. 2005;155(2-3):172-8.
Papafotiou, K., Carter, J. D., & Stough, C. (2005). The relationship between performance on the standardised field sobriety tests, driving performance and the level of Delta9-tetrahydrocannabinol (THC) in blood. Forensic Science International, 155(2-3), 172-8.
Papafotiou K, Carter JD, Stough C. The Relationship Between Performance On the Standardised Field Sobriety Tests, Driving Performance and the Level of Delta9-tetrahydrocannabinol (THC) in Blood. Forensic Sci Int. 2005 Dec 20;155(2-3):172-8. PubMed PMID: 16226154.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The relationship between performance on the standardised field sobriety tests, driving performance and the level of Delta9-tetrahydrocannabinol (THC) in blood. AU - Papafotiou,K, AU - Carter,J D, AU - Stough,C, Y1 - 2005/01/11/ PY - 2004/09/06/received PY - 2004/11/23/revised PY - 2004/11/24/accepted PY - 2005/10/18/pubmed PY - 2006/3/17/medline PY - 2005/10/18/entrez SP - 172 EP - 8 JF - Forensic science international JO - Forensic Sci. Int. VL - 155 IS - 2-3 N2 - The consumption of Delta9-tetrahydrocannabinol (THC) as cannabis has been shown to result in impaired and culpable driving. Testing drivers for the presence of THC in blood is problematic as THC and its metabolites may remain in the blood for several days following its consumption, even though the drug may no longer have an influence on driving performance. In the present study, the aim was to assess whether performance on the standardised field sobriety tests (SFSTs) provides a sensitive measure of impaired driving behaviour following the consumption of THC. In a repeated measures design, 40 participants consumed cigarettes that contained either 0% THC (placebo), 1.74% THC (low dose) or 2.93% THC (high dose). For each condition, after smoking a cigarette, participants performed the SFSTs on three occasions (5, 55 and 105 min after the smoking procedure had been completed) as well as a simulated driving test on two occasions (30 and 80 min after the smoking procedure had been completed). The results revealed that driving performance was not significantly impaired 30 min after the consumption of THC but was significantly impaired 80 min after the consumption of THC in both the low and high dose conditions. The percentage of participants whose driving performance was correctly classified as either impaired or not impaired based on the SFSTs ranged between 65.8 and 76.3%, across the two THC conditions. The results suggest that performance on the SFSTs provides a moderate predictor of driving impairment following the consumption of THC and as such, the SFSTs may provide an appropriate screening tool for authorities that wish to assess the driving capabilities of individuals suspected of being under the influence of a drug other than alcohol. SN - 0379-0738 UR - https://www.unboundmedicine.com/medline/citation/16226154/The_relationship_between_performance_on_the_standardised_field_sobriety_tests_driving_performance_and_the_level_of_Delta9_tetrahydrocannabinol__THC__in_blood_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0379-0738(04)00767-4 DB - PRIME DP - Unbound Medicine ER -