Mixed

Longitudinal sleep trajectories characterized by consistently short sleep (<5 hours) or decreasing sleep duration are associated with significantly increased risks of cardiovascular events and all-cause mortality compared to stable normal sleep (7-8 hours).

Monitor your sleep duration over time, not just on a single night. If you consistently sleep less than 5 hours a night, or if your sleep duration is steadily decreasing over months or years, you are at a significantly higher risk for heart disease and early death. Aim for a stable 7-8 hours of sleep. If you are experiencing a decline in sleep, investigate underlying causes (stress, health issues) and seek medical advice, as this pattern is a strong predictor of adverse health outcomes.