title: How the 1932 and 1947 mental surveys of Aberdeen schoolchildren provide a framework to explore the childhood origins of late onset disease and disability.
abstract: OBJECTIVE
  To describe the discovery and development of the Aberdeen 1921 and 1936 birth cohort studies.
  
  
  METHODS
  The Aberdeen birth cohort studies were started in 1998 when the Scottish Mental Survey archives of the Scottish Council for Research in Education were re-discovered and permissions granted to follow-up survivors born in 1921 or 1936 and then aged about 77 or 64 years and who had entered (or were about to enter) the age of greatest risk for Alzheimer's disease (AD).
  
  
  METHODS
  Sources of attrition from the study, exposures to childhood adversity, nutritional, genetic and life style factors of possible relevance to extent of age-related cognitive decline and the timing of onset of dementia.
  
  
  RESULTS
  By 2010, the feasibility of following up more than 75% of Scottish Mental Survey survivors living in the Aberdeen area without dementia was well-established, dementia ascertainment to age about 88 years was completed in the 1921 birth cohort and was underway in the 1936 born cohort.
  
  
  CONCLUSIONS
  These databases are available to other bone fide research groups wishing to test specific hypotheses that may either replicate their own findings or make best use of the data collected in the Aberdeen studies.
authors.affiliation: Institute of Applied Health Sciences, University of Aberdeen, Foresterhill, Aberdeen, United Kingdom. l.j.whalley@abdn.ac.uk
authors.forename: Lawrence J
authors.initials: LJ
authors.lastname: Whalley
authors.forename: Alison D
authors.initials: AD
authors.lastname: Murray
authors.forename: Roger T
authors.initials: RT
authors.lastname: Staff
authors.forename: John M
authors.initials: JM
authors.lastname: Starr
authors.forename: Ian J
authors.initials: IJ
authors.lastname: Deary
authors.forename: Helen C
authors.initials: HC
authors.lastname: Fox
authors.forename: Helen
authors.initials: H
authors.lastname: Lemmon
authors.forename: Susan J
authors.initials: SJ
authors.lastname: Duthie
authors.forename: Andrew R
authors.initials: AR
authors.lastname: Collins
authors.forename: John R
authors.initials: JR
authors.lastname: Crawford
mesh_terms: D000367:Age Factors; D017668:Age of Onset; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002664:Child Nutritional Physiological Phenomena; D003072:Cognition Disorders / Q000209:etiology* / Q000266:history; D015331:Cohort Studies; D003704:Dementia / Q000209:etiology* / Q000266:history; D005069:Evaluation Studies as Topic; D005260:Female; D005500:Follow-Up Studies; D020022:Genetic Predisposition to Disease; D006306:Health Surveys / Q000266:history; D049673:History, 20th Century; D006801:Humans; D008019:Life Style; D008297:Male; D008875:Middle Aged; D012606:Scotland