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A study of mortality among almost 4,000 Italian centenarians supports the idea that humans would reach a mortality plateau after 105 years according to the results published in the American magazine Science.
This work tipped the scales, according to its authors, to those who believe that man has not reached its maximum lifespan, an old debate between scientists.
An article published in another major scientific journal, Nature, in 2016, he postulated, on the contrary, that the maximum longevity was already identified and had been reached with the record belonging to the French Jeanne Calment, who died in 1997 in France. 122 years old.
This study had indicated that the deans of humanity died around 115 years old, which would actually be the supposed limit.
Even in countries with good vital statistics, data rarely permit the study of these mortality rates for each age and the elderly are often grouped into bands.
The authors of the study published Thursday at Science, including Elisabetta Barbi of La Sapienza University in Rome, have established a meticulous database, with the help of l & # 39; 39; National Institute of Statistics in Italy, of all the inhabitants who were over 105 years old between 2009 and 2015, which turned out to be 3,836 people. Most of them were women: 78% of the total
"We have shown that the death rate, which increases exponentially up to the age of 80 , begins to slow down and reaches or approaches a 105-year-old plateau " Researchers write
These results " strongly suggest that longevity continues to increase with the time and that a limit, if it exists, has not yet been reached ".
This plateau phenomenon at extreme ages has been observed in other species. But this evolutionary trait remains little known.
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