SLEEP 2011 Abstract Supplement

B. Clinical Sleep Science VI. Sleep Disorders – Hypersomnia
0608
DRIVING AND SLEEP DISORDERS: DOES MSLT OR MWT
BETTER PREDICT DRIVING PERFORMANCE?
Philip P, Capelli A, Sagaspe P, Raimondi M, Taillard J
USR3413 CNRS, Bordeaux, France
Introduction: The maintenance of wakefulness test (MWT) predicts
simulated and real driving performance in non treated Obstructive Sleep
Apnea Syndrome (OSAS) patients. Recently, epidemiological studies
reported higher risk of road accidents for narcolepsy and hypersomnia
comparing to OSAS. The aim of our study is to determine the ability of
objective sleepiness measures (MWT or MSLT) to predict driving performance
in patients suffering from OSAS and hypersomnia compared
to healthy controls.
Methods: 148 subjects (38 healthy controls, 42 narcolepsy-hypersomnia
and 70 OSAS patients) performed a total of 96 MWT (4X40-minute
trials) and 77 MSLT (5x20-minute trials). For each test, a 40 min driving
session on real car driving simulator with monotonous driving scenario
was performed. Participants were divided into 3 groups defined by their
scores at MWT or MSLT (pathological (0-19 min for MWT and 0-8 min
for MSLT), intermediate (20-33 min for MWT and 9-11 min for MSLT),
and alert (34-40 min for MWT and 12-20 min for MSLT).
Results: The results showed that only sleep latencies at MWT were correlated
with number of inappropriate line crossings (r =- 0.31, p