Summary of “Study: many of the “oldest” people in the world may not be as old as we think”

How do some people make it to 100 or even 110 years old? Why do some regions – say, Sardinia, Italy, or Okinawa, Japan -produce dozens of these “Supercentenarians” while other regions produce none? Is it genetics? Diet? Environmental factors? Long walks at dawn?
Newman looks at the introduction of birth certificates in various states and finds that “The state-specific introduction of birth certificates is associated with a 69-82% fall in the number of supercentenarian records.”
In other words, as soon as a state starts keeping good records of when people are born, there’s a 69 to 82 percent fall in the number of people who live to the age of 110.
It does mean that the majority of people claiming to be supercentenarians, born in areas that didn’t keep reliable, accurate birth records, are probably not quite as old as they say they are.
In other words, all of our research into the biomarkers, habits, and diets that predict extreme old age? Probably worthless, because a significant share of the sample was not actually as old as we thought.
Only about one in 1,000 people who live to the age of 100 make it to 110.
The vast majority of people would never impersonate their parent or older sibling for benefits, or forge a birth certificate, or participate in identity theft, or get confused about how old they even are.
If one in 1,000 people would do that, then fraudulent supercentenarians will be more common than bona fide supercentenarians.

The orginal article.