Additional Study Information: Cognitive decline is highly prevalent in individuals with hearing impairment. Hearing deficits have been implicated with a decreased performance on various cognitive tests, but it is unclear whether this is associated with severe cognitive decline or dementia. In this study, we hope to better characterize theassociation between hearing impairment, depression, and major cognitive decline or dementia. We will also be looking at how hearing loss may affect an individuals clinical response to an antidepressant.