Lothian Birth Cohort 1921 (LBC1921)
About the cohort
PI: Professor Ian Deary
Start date: 1999
Age at recruitment: 79
Sample size at recruitment: 550
The participants of the Lothian Birth Cohort 1921 were recruited to the project because they had taken part in the Scottish Mental Survey 1932. This was followed the Scottish Mental Survey of 1947 from which the Lothian Birth Cohort 1936 was established.
The surveys had, respectively, tested the intelligence of almost every child born in 1921 or 1936 and attending school in Scotland in the month of June in those years. Tracing, recruiting and re-testing people who had taken part in the Surveys offered a rare opportunity to examine the distribution and causes of cognitive ageing across most of the human life course. The studies were initially set up to study determinants of non-pathological cognitive ageing; i.e. the ageing of cognitive functions largely in the normal range, and not principally dementia or other pathological cognitive disorders.
The LBC1921 began in 1999 and recruited 550 of the 87,498 individuals who had taken part in the 1932 survey. The LBC1921 have been examined at mean ages of 79, 83, 87, 90 and 92 years.
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Page last updated: 29 Apr 2015