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A study published in Frontiers in Aging reports unusually high late-life survival among women in Bolotana, Sardinia. Researchers estimate that 13.8% of women there who reach age 70 live to 100, but the study does not establish what causes the pattern or whether it applies beyond the generations examined.
A study of historical records from Bolotana, a Sardinian village of about 2,300 people, finds that women who reach age 70 are estimated to have a much higher chance of living to 100 than women in Italy or the United States. Published in Frontiers in Aging, the research suggests Bolotana may be a newly identified longevity hotspot, while leaving the reasons for the survival pattern unresolved.
The researchers estimated that 13.8% of Bolotana women who reach age 70 will live to 100. Their comparison figures were about 3.5% for women in Italy and 3.6% for women in the United States. The study also estimated that women in Bolotana who reached 70 had nearly 21 additional years of life expectancy. These are population estimates, not predictions for any individual.
To examine survival, the team reconstructed residents’ life histories using civil records and church archives, including birth, death and baptismal documents. The study recorded 38 people who reached 100 among 3,060 people born in Bolotana from 1900 to 1925. Researchers said matching records from different sources allowed them to verify ages, a key issue in research on extreme longevity.
The village had six residents aged 100 or older in 2024, which the researchers estimated was a prevalence about 11 times that of the United States. That figure describes the number of centenarians relative to the population at that time; it is separate from the study’s estimate of a person’s chance of reaching 100 after age 70.
Why Bolotana’s Records Matter
Bolotana could give longevity researchers a valuable setting for studying survival in old age, particularly among women. Its archives let investigators check ages against multiple records, addressing doubts that inaccurate documentation can inflate reported numbers of centenarians. The work offers evidence of an unusual demographic pattern, rather than proof of a cause.
The findings may also broaden research on so-called blue zones—places associated with unusually long lives. Sardinia already has a recognized blue-zone area known for high male longevity; Bolotana stands out in this report for its female survival estimates. If future research can identify factors linked to the pattern, they could inform broader studies of aging. The present study does not show that any particular habit will extend an individual’s life.
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How Bolotana Was Identified
Bolotana drew researchers’ attention after its reported concentration of centenarians. The team then examined historical records spanning more than a century to test whether the apparent longevity held up when ages and life histories were checked. The study focused on two measures: life expectancy at age 70 and the estimated likelihood of surviving from 70 to 100.
The report places Bolotana within the wider discussion of blue zones, a term used for communities where residents are reported to live unusually long lives. Other cited examples include Okinawa, Japan, and Costa Rica’s Nicoya Peninsula. Sardinia’s previously identified longevity area is known for an unusual pattern of male longevity; the Bolotana findings instead draw attention to women.
Researchers proposed possible areas for follow-up, including local food, walking, family support, social ties and genetics. The report describes these as potential contributors, not tested explanations. It does not establish that Bolotana residents share one diet or lifestyle, or that any single factor accounts for their survival.
“What makes Bolotana extraordinary is that it has an incredible historical record that allows us to definitively evaluate ages at birth and death.”
— S. Jay Olshansky, study co-author and professor emeritus of epidemiology at the University of Illinois Chicago School of Public Health
Causes and Scope Still Unclear
The study reports a survival pattern but does not explain why Bolotana women live so long. The researchers raised diet, physical activity, family and social ties, and genetics as possible influences; the findings provided do not isolate or measure their effects. No causal link between these factors and the village’s survival rates has been established.
The estimates also concern specific historical cohorts and depend on the records and methods used. The report does not establish whether the same rates hold for younger generations, whether men in Bolotana show a comparable pattern, or how the figures would compare under other research methods. Calling the village a possible blue zone remains a characterization suggested by the findings, not a settled explanation of exceptional longevity.
Further Study of Local Longevity
The study, by Giovanni Mario Pes and co-authors, is published in Frontiers in Aging. The source report does not give a date for further research or describe a planned follow-up study. Researchers would need additional evidence to test which community, lifestyle or genetic factors may be associated with the results and whether the pattern continues in later generations.
For now, the main development is a documented case for further investigation: Bolotana’s records support an unusual late-life survival pattern, especially among women. The next step is not to treat the village’s habits as a proven formula, but to determine how robust the estimates are and which explanations, if any, the data support.
Key Questions
What did the Bolotana study find?
Researchers estimated that 13.8% of women who reach 70 in Bolotana will live to 100. Their comparison estimates were about 3.5% for women in Italy and 3.6% in the United States.
Does the study prove why Bolotana residents live longer?
No. It describes an unusual survival pattern but does not establish its cause. The researchers named diet, walking, social support and genetics as possible factors for further study.
How did researchers check residents’ ages?
The team compared civil and church records, including birth, death and baptismal documents, to reconstruct life histories and check ages.
Is Bolotana officially a blue zone?
The study suggests Bolotana may qualify as a newly identified blue zone. The report presents this as a possibility based on the findings, not as a definitive explanation or label.
Do the results apply to everyone living in Bolotana today?
Not necessarily. The reported estimates draw on historical records and particular cohorts. The study does not establish that current or future residents will have the same survival rates.
Source: rss
