The purpose of this study was to characterize physical activity (PA) based on survey and ActiGraphy data from older adults at 2 mo post-hip fracture and consider the factors that influence PA among these individuals. The sample included participants from a current Baltimore hip study, the BHS-7. Measurement of PA was based on the Yale PA Survey (YPAS) and 48 hr of ActiGraphy. The sample include...

Quantitative and objective evaluation of disease severity and/or drug effect is necessary in clinical practice. Wearable accelerometers such as an actigraph enable long-term recording of a patient's movement during activities and they can be used for quantitative assessment of symptoms due to various diseases. We reviewed some applications of actigraphy with analytical methods that are sufficie...

This article examines the longitudinal relation between positive affect (PA) and sleep in 126 spousal Alzheimer's disease caregivers. Caregivers underwent 4 yearly assessments for the Positive and Negative Affect Schedule, the self-rated Pittsburgh Sleep Quality Index, and actigraphy to objectify nighttime total sleep time, wake after sleep onset, and percentage of sleep. Increased levels of PA...

The purpose of this investigation is to examine differences in rest-activity patterns and sleep characteristics in older adults with heart failure (HF) and healthy older adults. The sample included older adults with HF (n = 20) and a reference group of healthy older adults (n = 20). Traditional cosinor analysis was used to assess three parameters of rest-activity from wrist actigraphy data: amp...

Wrist actigraphy is a simple but powerful technique that allows long term monitoring of human activity. Among the wide range of areas of application, it has a special relevance in sleep studies, where its non-invasive nature makes it a valuable tool in the detection of abnormal behavioral patterns, associated with certain sleep disorders. While the detection of simple trends, such as circadian ...

Research in younger adults suggests sleep discrepancy (objective/subjective measurement difference) is a consistent pattern that primarily occurs within individuals with insomnia. To examine whether older adults exhibit a similar pattern, this study compared night-to-night inconsistency in sleep discrepancy between older adults with and without sleep complaints. Older adults (N = 103; mean age ...

Abstract This study aimed to examine the associations of both subjectively and objectively measured sleep with self-reported level physical activity among older adults, explore possible moderative role chronotype in these associations. Baseline data 116 community-dwelling adults without dementia from three prior studies were included. Pittsburgh Sleep Quality Index Actigraphy used as subjective...

The term “wearables” is now ubiquitous, generating a growing interest in the potential of this technology in Clinical trials. Questions remain around its clinical value and the logistics of integration into clinical trials. Not widely known is that “wearables” have been used in research to study sleep and activity patterns since the 1970’s1, to study clinical sleep and sleep disorder2 and track...

Although shift and break timing is known to affect the sleep of shiftworkers, this has not been demonstrated in Fly-in, Fly-out (FIFO) settings which, compared to residential based settings, may be favourable for sleep. This study investigated the sleep quantity and quality of shiftworkers working a FIFO operation comprising of shifts, and therefore breaks, across the 24-h day. The sleep of 24 ...

The aim of this study was to examine the validity of activity-based monitoring (actigraphy) for the assessment of sleep-wake patterns during the 1st year of life. Forty-one infants were directly observed for sleep-wake state determination by trained observers. Concomitant activity data obtained by actigraphs attached to the infants’ ankles during the observation were matched on a minute-by-minu...