has been validated for the propensity of sleep in 8 situations. The questionnaire posed simple, unambiguous questions on sleepi- ness, measures of sleepy driving, sleepy near-miss accidents, and accidents associated with sleepiness. It was designed, compiled, and reviewed by a group of university sleep researchers at the Stanford Sleep Disorders and Research Center at Stanford Uni- versity School of Medicine (Stanford) and the Division of Biosta- tistics at Washington University School of Medicine (St Louis), and the Sleep Disorders Center and Sleep Apnea Research Group at the University of Washington (Seattle).