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Wilkinson VE, Jackson ML, Westlake J, Stevens B, Barnes M, Cori J, Swann P, Howard ME. Assessing the validity of eyelid parameters to detect impairment due to benzodiazepines. Hum Psychopharmacol 2020; 35:e2723. [PMID: 32022371 DOI: 10.1002/hup.2723] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 11/20/2019] [Accepted: 01/06/2020] [Indexed: 12/25/2022]
Abstract
OBJECTIVE Benzodiazepines impair driving ability and psychomotor function. Eyelid parameters accurately reflect drowsiness; however, the effects of benzodiazepines on these measures have not been extensively studied. The aim of this study was to investigate the effect of benzodiazepines on eyelid parameters and evaluate their accuracy for detecting psychomotor impairment. METHODS Eyelid parameters were recorded during a psychomotor vigilance task (PVT) and driving simulation over 2 days, baseline, and after 20-mg oral temazepam. The utility of eyelid parameters for detecting PVT lapses was evaluated using receiver operating characteristic curves, and cut-off levels indicating impairment (≥1 and ≥2 PVT lapses per min) were identified. The accuracy of these cut-off levels for detecting driving simulator crashes was then examined. RESULTS PVT and driving simulator performance was significantly impaired following benzodiazepine administration (p < .05). Average eyelid closure duration (inter-event duration) was a reliable indicator of PVT lapses (area under the curve [AUC] of 0.87-0.90). The cut-off value of eyelid closure duration derived from PVT AUC was able to predict driving simulator crashes with moderately high sensitivity and specificity (76.23% and 75.00%). CONCLUSIONS Eyelid parameters were affected by benzodiazepines and accurately detected the psychomotor impairment. In particular, eyelid closure duration is a promising real-time indicator of benzodiazepine impairment.
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Affiliation(s)
- Vanessa E Wilkinson
- Institute for Breathing and Sleep, Austin Health, Heidelberg, Victoria, Australia
| | - Melinda L Jackson
- Institute for Breathing and Sleep, Austin Health, Heidelberg, Victoria, Australia.,School of Health & Biomedical Sciences, RMIT University, Bundoora, Victoria, Australia.,School of Psychological Sciences, Monash University, Clayton, Victoria, Australia
| | - Justine Westlake
- Institute for Breathing and Sleep, Austin Health, Heidelberg, Victoria, Australia
| | - Bronwyn Stevens
- Institute for Breathing and Sleep, Austin Health, Heidelberg, Victoria, Australia
| | - Maree Barnes
- Institute for Breathing and Sleep, Austin Health, Heidelberg, Victoria, Australia
| | - Jennifer Cori
- Institute for Breathing and Sleep, Austin Health, Heidelberg, Victoria, Australia
| | - Philip Swann
- Department of Road Safety, VicRoads, Kew, Victoria, Australia
| | - Mark E Howard
- Institute for Breathing and Sleep, Austin Health, Heidelberg, Victoria, Australia.,School of Psychological Sciences, Monash University, Clayton, Victoria, Australia.,Department of Medicine, University of Melbourne, Parkville, Victoria, Australia
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