Extremes

, Volume 20, Issue 4, pp 713–728 | Cite as

Human life is unlimited – but short

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Abstract

Does the human lifespan have an impenetrable biological upper limit which ultimately will stop further increase in life lengths? This question is important for understanding aging, and for society, and has led to intense controversies. Demographic data for humans has been interpreted as showing existence of a limit, or even as an indication of a decreasing limit, but also as evidence that a limit does not exist. This paper studies what can be inferred from data about human mortality at extreme age. We find that in western countries and Japan and after age 110 the risk of dying is constant and is about 47% per year. Hence data does not support that there is a finite upper limit to the human lifespan. Still, given the present stage of biotechnology, it is unlikely that during the next 25 years anyone will live longer than 128 years in these countries. Data, remarkably, shows no difference in mortality after age 110 between sexes, between ages, or between different lifestyles or genetic backgrounds. These results, and the analysis methods developed in this paper, can help testing biological theories of aging and aid confirmation of success of efforts to find a cure for aging.

Keywords

Extreme human life lengths No influence of lifestyle on survival at extreme age No influence of genetic background on survival at extreme age Future record ages Supercentenarians Jeanne Calment Limit for human life span Force of mortality Size-biased sampling IDL GRG 

AMS 2000 Subject Classifications

62P10 62N01 

Notes

Acknowledgements

We thank Anthony Davison, Jutta Gampe, Olle Häggström, Peter Jagers, Niels Keiding, Steve Marron, Thomas Mikosch, Olle Nerman, and an associate editor for comments. Research supported by the Knut and Alice Wallenberg Foundation, grant KAW 2012.0067.

Supplementary material

10687_2017_305_MOESM1_ESM.zip (283 kb)
(Electronic Supplementary material(zip) 284 KB)

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© The Author(s) 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  1. 1.Chalmers and Gothenburg UniversityGothenburgSweden

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