@article{ref1,
title="Excursions out-of-lane versus standard deviation of lateral position as outcome measure of the on-the-road driving test",
journal="Human psychopharmacology",
year="2014",
author="Verster, Joris Cornelis and Roth, Thomas",
volume="29",
number="4",
pages="322-329",
abstract="BACKGROUND: The traditional outcome measure of the Dutch on-the-road driving test is the standard deviation of lateral position (SDLP), the weaving of the car. This paper explores whether excursions out-of-lane are a suitable additional outcome measure to index driving impairment. <br><br>METHODS: A literature search was conducted to search for driving tests that used both SDLP and excursions out-of-lane as outcome measures. The analyses were limited to studies examining hypnotic drugs because several of these drugs have been shown to produce next-morning sedation. <br><br>RESULTS: Standard deviation of lateral position was more sensitive in demonstrating driving impairment. In fact, solely relying on excursions out-of-lane as outcome measure incorrectly classifies approximately half of impaired drives as unimpaired. The frequency of excursions out-of-lane is determined by the mean lateral position within the right traffic lane. Defining driving impairment as having a ΔSDLP > 2.4 cm, half of the impaired driving tests (51.2%, 43/84) failed to produce excursions out-of-lane. Alternatively, 20.9% of driving tests with ΔSDLP < 2.4 cm (27/129) had at least one excursion out-of-lane. <br><br>CONCLUSIONS: Excursions out-of-lane are neither a suitable measure to demonstrate driving impairment nor is this measure sufficiently sensitive to differentiate adequately between differences in magnitude of driving impairment. Copyright © 2014 John Wiley & Sons, Ltd.<p /> <p>Language: en</p>",
language="en",
issn="0885-6222",
doi="10.1002/hup.2406",
url="http://dx.doi.org/10.1002/hup.2406"
}