Today's methods for keeping an eye on the cognition of older adults aren't cutting it, especially with the rising number of people with Alzheimer's disease and related dementias. We need better ways that are sensitive, can be used on a large scale, give objective results, and reflect real-life functions.

One promising approach is to look at how people move around and their daily routines. These factors can give us clues about a person's cognitive and functional abilities, and they might help us spot signs of age-related cognitive decline.

Imagine using smartphones to track all this without bothering the person too much. This study checked if it's feasible, acceptable, and gives us a good idea of what's going on.

The study involved older adults who carried their smartphones as usual. The phones gathered data on their movements and daily activities. This data was then used to create a digital profile, or "phenotype, " of each person's mobility and life space.

The results showed that this method is doable and people found it acceptable. It also provided some initial evidence that these digital phenotypes can give us insight into a person's cognitive health.

However, the study also highlighted some challenges. For instance, the accuracy of the data can be affected by how well the smartphone's sensors work. And there's always the concern about privacy and data security.

Despite these hurdles, the potential of using smartphones to monitor cognitive health in older adults is exciting. It could lead to earlier detection of cognitive decline and better care for those at risk.

Tracking Older Adults' Daily Life with Smartphones: A New Way to Monitor Cognitive Health

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