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Research Letter
December 2015

Association Between Alzheimer Dementia Mortality Rate and Altitude in California Counties

Author Affiliations
  • 1Geriatric Research, Education, and Clinical Center, Puget Sound VA Medical Center, Seattle, Washington
  • 2Portland VA Medical Center, Portland, Oregon
JAMA Psychiatry. 2015;72(12):1253-1254. doi:10.1001/jamapsychiatry.2015.1852

Environmental risk factors for Alzheimer dementia are not well understood. Air pollution may have a causative role.1 In light of findings about lower incidence of psychiatric conditions, such as attention-deficit/hyperactivity disorder, at higher altitudes,2 we sought to determine whether rates of dementia were associated with average altitude of residence.

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