The prevalence of dementia among homeless people is almost twice as high as that in housed populations in Ontario, Canada, according to the results of a new study. Dr. Stephen Hwang spoke with Medscape about how research may underestimate the magnitude of the problem of dementia among homeless people. “Often, people experiencing homelessness don’t have extensive contact with the healthcare system, and so their condition may go undiagnosed,” said Dr. Hwang.