Stephen J.LurieMD, PhD, Senior EditorIndividualAuthorJody W.ZylkeMD, Contributing EditorIndividualAuthor
To the Editor: Dr Hendrie and colleagues1 suggest that the lower incidence of dementia and Alzheimer disease in Nigeria compared with African Americans in Indianapolis could be due to dietary factors. Farrer2 has suggested that environmental factors, such as diet and exercise, may mediate this relationship. While not ruling out involvement of diet and exercise, there is reason to believe that another factor is also important, namely differing levels of exposure to data input, especially from television.
Clarke RP. Incidence of Dementia and Alzheimer Disease in Nigeria and the United States. JAMA. 2001;285(19):2448–2449. doi:10.1001/jama.285.19.2448