The Human Longevity Record May Hold for Decades: Jeanne Calment’s Extraordinary Record Is Not Evidence for an Upper Limit to Human Lifespan
Level 4 - case-series / case-control
Level 4 by design analogy: demographic mathematical modeling and statistical analysis of historical supercentenarian registry data.
OpenAlex W3112456969 · doi:10.1007/978-3-030-49970-9_5
What was done
The authors used supercentenarian mortality data available as of September 25, 2017, for individuals who reached age 110. Assuming a constant annual probability of death of 50% after age 110, they mathematically modeled the probability of an individual reaching Jeanne Calment's record age of 122.45 years, the likelihood of the record remaining unbroken between 1997 and 2017, and the timeline for when it might be surpassed.
What was found
Under the 50% annual mortality assumption, the probability that a person surviving to age 110 would reach age 122.45 by September 25, 2017, was 17.1%. The probability that Calment's record would have been broken between her death in 1997 and 2017 was 20.3%. The model estimated a less than 50% probability that any individual will surpass her lifespan before the year 2045.
Why it matters
This study demonstrates that Jeanne Calment's extreme lifespan is statistically plausible without requiring unique biological anomalies, and that a multi-decade gap before her record is broken is expected rather than evidence of a hard biological ceiling on human lifespan.
Limits
The abstract does not state the exact sample size (number of supercentenarians evaluated). The findings depend heavily on the assumption that annual mortality plateaus at a constant 50% past age 110, rather than continuing to rise, and projections do not account for potential future shifts in medical interventions or cohort health.
Cited by
- supports Jeanne Calment of France is the longest-living human being ever recorded, having lived to age 122.