an article taken from internet about the oldest old

Several studies have shown that centenarians have better cardiovascular risk profiles compared to younger old people. The contribution of drug treatments to promote extreme longevity is not confirmed and centenarians in general have needed fewer drugs at younger ages due to a healthy lifestyle.^[17] A study by the International Longevity Centre-UK, published in 2011, suggested that today's centenarians may be healthier than the next generation of centenarians.^[18]
Ninety percent of the centenarians studied in the New England Centenarian Study were functionally independent the vast majority of their lives up until the average age of 92 years and seventy-five percent were the same at an average age of 95 years.^[19] Similarly, a study of US supercentenarians (age 110 to 119 years) showed that, even at these advanced ages, 40% needed little assistance or were independent.^[20]
A study supported by the US National Institute on Aging found significant associations between month of birth and longevity, with individuals born in September–November having a higher likelihood of becoming centenarians compared to March-born individuals.^[21]