Wearable accelerometers provide detailed, objective, and continuous measurements of
physical activity (PA). Recent advances in technology and the decreasing cost of wearable …

Importance Hearing loss may be a modifiable factor associated with decreased physical
activity in older adults. Objective To examine the association of hearing loss with objectively …

Background With aging, daily physical activity (PA) becomes less frequent and more
fragmented. Accumulation patterns of daily PA—including transitions from active-to …

The NHANES study contains objectively measured physical activity data collected using hip-
worn accelerometers from multiple cohorts. However, using the accelerometry data has …

Background Objective evaluation of people with amyotrophic lateral sclerosis (PALS) in free-
living settings is challenging. The introduction of portable digital devices, such as wearables …

Background Objective measures of physical activity (PA) derived from wrist-worn
accelerometers are compared with traditional risk factors in terms of mortality prediction …

We introduce fast multilevel functional principal component analysis (fast MFPCA), which
scales up to high dimensional functional data measured at multiple visits. The new approach …

We propose the additive functional Cox model to flexibly quantify the association between
functional covariates and time to event data. The model extends the linear functional …

Developments in wearable technology have enabled researchers to continuously and
objectively monitor various aspects and physiological domains of real life including levels of …

Higher physical activity levels are associated with reduced cognitive decline among older
adults; however, current understanding of underlying brain mechanisms is limited. This …