Loneliness increases a person's risk of dementia by 40 percent, according to a data analysis of 12,030 participants over 10 years. Risk applies to all demographics, including gender, race, ethnicity or education, as well as whether there is social contact with friends and family.

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Loneliness increases a person's risk of dementia by 40 percent, according to a data analysis of 12,030 participants over 10 years. Risk applies to all demographics, including gender, race, ethnicity or education, as well as whether there is social contact with friends and family.