Marie-Louise Muir tells the story of the Nun Study; a pioneering study, started in America in the 1980s, which brought a young epidemiologist together with a group of Catholic Sisters to examine the mysteries of ageing and Alzheimer’s.
In 1986 Dr David Snowdon approached the sisters at the convent of the School Sisters of Notre Dame in Minnesota. An order of Catholic sisters with their uniform life-styles were perfect for an examination of the ageing process. It was the beginning of a study which experts still consider to be one of the most innovative efforts to answer questions about who gets Alzheimer's disease and why.
An unlikely friendship developed between Snowdon and the sisters. Some of the nuns recall how they would look forward to the annual cognitive and memory tests. "We cared about Dr Snowdon and he cared about us", says one of the nuns. "He would walk with us and talk with us and we looked forward to his visits."
A breakthrough came when the Snowdon team came across...
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