All participants were residents of a suburb of Rotterdam, The Netherlands. No other information on ethnicity or race has been reported.
Diagnosis & Evaluation Methods
For a detailed description, see Ott A et al 1998..
Ott A, Breteler MM, van Harskamp F, Stijnen T, Hofman A. Incidence and risk of dementia. The Rotterdam Study. Am J Epidemiol. 1998 Mar 15;147(6):574-80.
Reitz C, den Heijer T, van Duijn C, Hofman A, Breteler MM. Relation between smoking and risk of dementia and Alzheimer disease: the Rotterdam Study. Neurology. 2007 Sep 4;69(10):998-1005.