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Sleep Deficiency Leads to Higher Number of Motor Vehicle Crashes

Sleep Deficiency Leads to Higher Number of Motor Vehicle Crashes

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WEDNESDAY, April 11, 2018 — Sleep deficiency due to sleep apnea or sleep duration less than seven hours is associated with motor vehicle crashes independent of self-reported excessive sleepiness, according to a study published online March 20 in BMC Medicine.

Daniel J. Gottlieb, M.D., M.P.H., from Brigham & Women’s Hospital in Boston, and colleagues conducted a prospective observational cohort study involving 1,745 men and 1,456 women aged 40 to 89 years. Sleep apnea was measured by home polysomnography, and sleep duration and daytime sleepiness were assessed using questionnaires. Participants completed a follow-up questionnaire two years after baseline. The correlation for sleep apnea and sleep duration at baseline with motor vehicle crashes during the year preceding the follow-up visit was examined.

The researchers found that 6.9 percent of the 3,201 evaluable participants reported at least one motor vehicle crash during the previous year. Significant associations with crash risk were seen for a higher apnea-hypopnea index, fewer hours of sleep, and self-reported excessive sleepiness. Compared with no sleep apnea, severe sleep apnea was correlated with a 123 percent increased crash risk. Compared with sleeping seven or eight hours per night, sleeping six hours was correlated with a 33 percent increased crash risk. Even in those who did not report excess sleepiness, these correlations were present. The population-attributable fraction of motor vehicle crashes was 10 and 9 percent due to sleep apnea and sleep duration less than seven hours, respectively.

“Sleep deficiency due to either sleep apnea or insufficient sleep duration is strongly associated with motor vehicle crashes in the general population, independent of self-reported excessive sleepiness,” the authors write.

Several authors disclosed financial ties to pharmaceutical and medical device companies, and one has a patent pending on a home sleep monitoring device.

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Posted: April 2018

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