A stay in the intensive care unit may increase the risk of dementia in elderly people, according to a study published in the journal Critical Care. Those who had certain infections, dialysis or brain damage were more likely to develop dementia, as were those who had short-term mental problems while in the ICU. "These findings suggest that certain diseases and events associated with a critical illness may increase the risk of dementia, or 'unmask' previously undiagnosed dementia," the researchers wrote.

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