Higher elderly population linked to longer female life expectancy
Comparing Life expectancy at birth, female (years) with Population ages 65 and above, total, per capita across 212 countries, 2025–2025.
- Rank correlation
- +0.80
- Holding size constant
- +0.73
- Countries compared
- 212
- Period
- 2025–2025
What might link these
Wealthier countries with better healthcare may have both higher elderly populations and longer life expectancies. A careful reader should note that correlation does not imply causation—other factors like healthcare quality, education, or policy could drive both trends.
Why this is not proof of anything
This is a correlation across countries, not an experiment. It cannot show that either indicator causes the other, and both may simply follow a third thing. Correlation alone cannot rule out unmeasured confounders like healthcare access or socioeconomic conditions.
The second figure above repeats the measurement with national population and income held constant. It is the more conservative number: a relationship that largely disappears there was mostly telling you that larger, richer countries have more of most things.
How this was measured
Both indicators were ranked across every country reporting each, and the two rankings compared — ranks rather than raw values, because a handful of very large countries can otherwise manufacture a relationship on their own. The calculation is arithmetic over figures already published on this site; the commentary above is drafted from the two indicator names and the resulting coefficients.