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Fig. 2 | BMC Medicine

Fig. 2

From: Sleep deficiency and motor vehicle crash risk in the general population: a prospective cohort study

Fig. 2

The relation of sleep apnea (a) and reported usual sleep duration (b) to motor vehicle crash risk, adjusted for age, sex, and miles driven. Data are shown separately for non-sleepy (black, n = 2402) and sleepy (gray, n = 799) participants, where sleepiness is defined as a score ≥ 11 on the Epworth Sleepiness Scale. The referent group for a is non-sleepy participants with apnea-hypopnea index < 5. The referent group for b is non-sleepy participants reporting a usual sleep duration of 8 hours per night

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