Figure 2. Multivariable Cox proportional hazard ratio (HR) for all‐cause and cardiovascular disease (CVD) mortality based on restricted cubic spline analysis of sleep duration.

A, Objective sleep duration and all‐cause mortality. B, Self‐reported sleep duration on weekdays and all‐cause mortality. C, Self‐reported sleep duration on weekends and all‐cause mortality. D, Objective sleep duration and CVD mortality. E, Self‐reported sleep duration on weekdays and CVD mortality. F, Self‐reported sleep duration on weekends and CVD mortality.