Women who reach the age of 70 in the Sardinian village of Bolotana have an unusually high chance of living to 100, according to a demographic analysis published in Frontiers in Aging on 5 October. The researchers built sex-specific period life tables from validated civil and parish records covering 2021 to 2025, and calculated that a woman aged 70 in Bolotana had a 13.83% probability of surviving to 100, with a 95% confidence interval running from 7.33% to 23.75%. Life expectancy at 70 for women was 20.85 years. Men did less well, with a 4.92% probability of reaching 100 and a life expectancy at 70 of 16.02 years. Medical Xpress reports the equivalent survival figure for women aged 70 across Italy as a whole at 3.5%, and 3.6% in the United States. The authors say the village’s female survival exceeded every contemporary Italian regional comparison they tested.
How the researchers worked it out
The team, which includes Giovanni Mario Pes, Steven Austad, Hiram Beltrán-Sánchez and S. Jay Olshansky, used a parametric Poisson bootstrap with 20,000 replications to put uncertainty bounds on the estimates, and ran sensitivity analyses against an earlier 2015 to 2019 period. Dan Buettner, who popularised the Blue Zones label for long-lived populations, is also a co-author. The authors declare that no financial support was received for the work. They list several limitations of their own. The population is small, which is why the confidence intervals are so wide. The observation window includes the COVID-19 years, mortality data at the oldest ages is sparse, and emigrants were not fully followed up, which may undercount centenarians.
What this means for you
This is an analysis of one village’s records rather than a test of anything a reader could adopt. It reports where exceptional late-life survival is happening and says nothing about why. The authors do not identify a diet, an activity pattern or any other cause, and the Medical Xpress write-up notes the same gap. Nothing in the paper supports moving from these survival figures to a lifestyle recommendation, and the authors do not attempt it. For UK-specific guidance on healthy ageing, NHS advice is the more useful reference point than a Sardinian life table.
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