Older adults who are socially isolated have a 27% higher chance of developing dementia, according to researchers from Johns Hopkins. The findings suggest that simple interventions could be meaningful.
, the study tracked 5,022 dementia-free U.S. adults who were 65 or older – with an average age of 76 – and not living in a residential care facility. About 23% of participants were socially isolated.
Social isolation is defined as having few relationships and few people to interact with regularly. The study measured this based on whether or not participants lived alone, talked about"important matters" with two or more people in the past year, attended religious services or participated in social events. Participants were assigned one point for each item, and those who scored a zero or one were classified as socially isolated.
Over the course of nine years, researchers periodically administered cognitive tests. Overall, about 21% of the study participants developed dementia. But among those were who were socially isolated, about 26% developed dementia – compared to slightly less than 20% for those who were not socially isolated.The study did not find significant differences by race or ethnicity.
Social isolation has previously been known as a dementia risk factor and is linked to other serious health conditions such as heart disease and depression,About 5.8 million people in the U.S. have Alzheimer's disease, which is the most common type of dementia,
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