Definition
There is no consensus definition for who constitutes oldest-old adults, or the oldest-old. Most commonly, the oldest-old in developed countries refers to people ages 85 or older; whereas it often refers to people ages 80 or older in developing countries (National Research Council and Committee on Population 2001). In United Nations publications, and from definitions by the American Geriatric Society and the World Health Organization, it generally refers to people ages 80 or older (United Nations 2019). The oldest-old ages are also referred to as the “fourth age.” From a population-based perspective, the transitional threshold between the third age and the fourth age is the chronological age at which 50% of older adults are no longer alive (Baltes and Smith 2003). In a few cases, researchers have also used the term to refer to centenarians (Poon and Cohen-Mansfield 2011).
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References
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Wu, Q., Gu, D. (2021). Oldest-Old Adults. In: Gu, D., Dupre, M.E. (eds) Encyclopedia of Gerontology and Population Aging. Springer, Cham. https://doi.org/10.1007/978-3-319-69892-2_1121-1
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DOI: https://doi.org/10.1007/978-3-319-69892-2_1121-1
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Oldest-Old Adults- Published:
- 21 January 2022
DOI: https://doi.org/10.1007/978-3-319-69892-2_1121-2
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Oldest-Old Adults- Published:
- 22 October 2020
DOI: https://doi.org/10.1007/978-3-319-69892-2_1121-1