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## Examining Daily Associations among Sleep, Stress, and Blood Pressure across Adulthood Newman, D. B., Gordon, A. M., Prather, A. A., & Mendes, W. B. (accepted). Examining daily associations among sleep, stress, and blood pressure across adulthood. *Annals of Behavioral Medicine.* Abstract: **Background**: Sleep can have consequential effects on people’s health and well-being, and these effects may vary among younger and older adults. **Purpose**: The goal of the present study was to investigate how sleep relates to physiologic and stress responses in daily life across adulthood. **Method**: We used an Ecological Momentary Assessment method in a large sample of participants (N = 4,359; Mage = 46.75, SD = 12.39; 69.30% male, 29.85% female) who completed morning sleep diaries, reported subjective stress, and recorded their heart rate and blood pressure for 21 days. Sleep was assessed with self-reports of duration, efficiency, and quality. **Results**: Using multilevel modeling, between-person analyses showed that sleep duration, efficiency, and quality were negatively related to morning heart rate and stress, such that people who slept longer, more efficiently, or better experienced lower heart rate and stress compared to those who slept shorter, less efficiently, or worse. Within-person analyses showed that sleep duration, efficiency, and quality predicted morning heart rate, blood pressure (though less consistently), and stress. That is, people experienced lower heart, blood pressure, and stress following nights when they slept longer, more efficiently, or better than they typically did. These within-person relationships were moderated by age, such that the effects of better and longer sleep on lower morning heart rate, blood pressure, and stress were stronger among younger than older adults. **Conclusions**: These finding suggest that daily variations in sleep show immediate associations with stress and physiologic responses, but these daily variations have a stronger relationship among younger compared to older adults.
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