Evidence for a limit to human lifespan.
Level 3 - non-randomized controlled study
Retrospective demographic and population trend analysis (CEBM Level 3 by design analogy)
PubMed 27706136 · doi:10.1038/nature19793
What was done
The authors analyzed global demographic mortality and survival data across historical eras to examine whether increases in human life expectancy continue into extreme old age, specifically evaluating survival improvements beyond age 100 and tracking trends in the maximum age at death for the oldest documented individuals worldwide.
What was found
The abstract does not report specific numerical data, sample sizes, or statistical parameters. It reports directionally that gains in survival with age decline after age 100, and the maximum age at death among the world's oldest individuals has ceased to increase since the 1990s.
Why it matters
These findings suggest that human longevity is constrained by inherent biological limits rather than being indefinitely extendable through current socio-technological and medical progress.
Limits
The abstract contains no quantitative metrics, effect sizes, or specific sample counts. Observational demographic analyses of extreme longevity are vulnerable to historical record-keeping variations and validation biases, and past demographic trends cannot rule out potential future biological interventions.
Cited by
- supports The maximum biological genetic potential for human longevity is approximately 120 years.