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.
Thielke S, Slatore CG, Banks WA. Association Between Alzheimer Dementia Mortality Rate and Altitude in California Counties. JAMA Psychiatry. 2015;72(12):1253-1254. doi:10.1001/jamapsychiatry.2015.1852