Sleep disturbances are common in older adults and are as- sociated with a variety of adverse mental and physical health outcomes. While most studies have characterized sleep based on a single dimension of sleep (typically sleep duration or self- reported sleep quality), there is a growing paradigm shift to characterize “Sleep Health” as multidimensional. More re- search is needed to identify the clinical utility of a multidimen- sional approach to characterizing sleep specifcally in older adults. In this symposium, we will present fve studies that ex- plore how multidimensional Sleep Health relates to age-related health outcomes (e.g., fall risk). Our frst presentation will identify associations between subjective/objective sleep quality and physical activity, and examine the moderating role of chronotype. Second, we will examine the extent to which a multidimensional index of Sleep Health and its individual di- mensions relate to fall risk. Third, we will ascertain the impact of mindfulness on various Sleep Health dimensions. Fourth, we will identify the extent to which discordance in subjective and objective sleep metrics are related to cognitive functioning. Finally, we will explore how the accumulation of disturbances in Sleep Health may increase risk for early mortality. Findings from this symposium will highlight the clinical relevance of a multidimensional approach to Sleep Health in older adults, and identify the ways in which sleep interventions can be tailored to specifc sleep dimensions to promote health in later life. THE ASSOCIATION OF SLEEP AND PHYSICAL ACTIVITY AMONG OLDER ADULTS AND THE MODERATION OF CHRONOTYPE Jing Huang 1 , Mengchi Li 2 , Miranda McPhillips 3 ,  Nada Lukkahatai 1 , and Junxin LI 1 , 1. Johns Hopkins University, Baltimore, Maryland, United States, 2. Johns Hopkins, University, Baltimore, Maryland, United States, 3. University of Pennsylvania, Philadelphia, Pennsylvania, United States This study aimed to examine the associations of both sub- jectively and objectively measured sleep with self-reported level of physical activity among older adults, and explore the possible moderative role of chronotype in these associations. Baseline data of 116 community-dwelling older adults without dementia from three prior studies were included. Pittsburgh Sleep Quality Index and Actigraphy were used as subjective and objective sleep measures respectively. The Morningness-Eveningness Questionnaire was used to measure chronotype, which was fur- ther dichotomized into morning type and non-morning type. Physical activity was assessed by the Physical Activity Scale for Elderly. Multiple linear regressions were performed to examine the associations, controlling for demographic and health char- acteristics. We found better subjective sleep quality, shorter actigraphy sleep duration, and higher sleep effciency were in- dependently associated with greater physical activity. Being morning type might alleviate the association between poor sub- jective sleep quality and physical activity among older adults. MULTIDIMENSIONAL SLEEP HEALTH AND RECURRENT FALLS: THE OSTEOPOROTIC FRACTURES IN MEN STUDY (MROS) Jane Cauley 1 , Stephanie Harrison 2 , Peggy Cawthon 3 ,  Andrew Kubala 4 , Kristine Ensrud 5 , Carolyn Crandall 6 ,  Daniel Buysse 7 , and Katie Stone 8 , 1. University of Pittsburgh, Pittsburgh, Pennsylvania, United States, 2. California Pacifc Medical Center, Research Institute, San Francisco, California, United States, 3. California Pacifc Medical Center Research Institute, San Francisco, California, United States, 4. Sleep, Tactical Effciency, and Endurance Lab (STEEL) Research Group, San Diego, California, United States, 5. University of Minnesota Medical School and Minneapolis VA Health Care System, Minneapolis, Minnesota, United States, 6. University of California, Los Angeles, Los Angeles, California, United States, 7. UPMC, Pittsburgh, Pennsylvania, United States, 8. University of California, San Francisco, Castro Valley, California, United States Prospective studies have reported associations between in- dividual dimensions of sleep and subsequent falls. Considering sleep as a multidimensional construct may provide a more comprehensive assessment. Using data from the MrOS Sleep study, we calculated a multidimensional index of sleep, op- erationalized as the number of disturbances in 5 dimensions of sleep (self-reported “poor”: satisfaction, duration, day- time sleepiness, latency and sleep midpoint) and categorized as: 0, 1-2, >=3. A total of 3111 men, mean age 76.4 years, were studied. Logistic regression generalized estimating equa- tions were used to model repeated measures of annually self- reported recurrent falls (≥2 falls) over 4 years of follow-up. Compared to men with no poor sleep dimensions, the Odds Ratio (OR) of recurrent falls in men with scores of 1 or 2 was 1.13 (95% Confdence Intervals, 0.96, 1.34), and in men with scores >3, the OR was 1.46(1.15, 1.84). Worse multidimen- sional sleep health was associated with recurrent falls. FOCUS ON PRESENT MOMENT FOR YOUR SLEEP: MINDFULNESS PROMOTES MID-LIFE ADULTS' SLEEP HEALTH Claire Smith, Christina Mu, Angelina Venetto, Arooj Khan, and Soomi Lee, University of South Florida, Tampa, Florida, United States Sleep health during midlife sets the stage for health over the lifespan. Mindfulness, or present-moment awareness and attention, is shown to beneft sleep, yet mechanisms ex- plaining these benefts are missing. Applying self-regulation theory, we test affective and cognitivemechanisms linking mindfulness to quantitative and qualitative sleep health. Across two independent samples of nurses (N1=60; N2=84), ecological momentary assessment (measuring mindfulness, sleep quality and suffciency, positive and negative affect, and rumination) and actigraphy (sleep duration and wake- after-sleep-onset [WASO]) were collected over fourteen days. Multilevel mediation revealed that, between people, mind- fulness generally associated with better sleep quality and suffciency, mediated by lower rumination and negative af- fect. Within people, daily mindfulness associated with better sleep suffciency, mediated by higher positive affect. Our fndings position mindfulness as an emotional and cognitive self-regulation strategy that promotes midlife adults’ qualita- tive – but not quantitative -- sleep health. Results may inform health interventions during this pivotal life stage. CON/DISCORDANCE BETWEEN SUBJECTIVE AND OBJECTIVE SLEEP PARAMETERS AND THEIR ASSOCIATION WITH COGNITIVE FUNCTION Kristin Calfee, and Soomi Lee, University of South Florida, Tampa, Florida, United States Studies report that subjective and objective sleep parameters often do not agree with each other. This study examined if dis- cordance between subjective and objective sleep measures are 296 Innovation in Aging, 2022, Vol. 6, No. S1 Downloaded from https://academic.oup.com/innovateage/article/6/Supplement_1/296/6938069 by guest on 23 December 2022