Women still live longer than men

Looking at a strong physique, it seems that men live longer than women, but on the contrary, men still do not live as long as women - and this is also true for human primate cousins, according to a new study. said.

In this study, scientists analyzed data from six populations both modern and historical, in different countries. Researchers found that: "Despite a huge increase in human life in the last century, male-female differences have not shrunk," says Susan Alberts, a professor of biology at the University. Duke and co-author of this new study.

Researchers have found that the number of women who live longer than men varies between populations. For example, the largest male-female life expectancy among research populations is in modern Russia, with a distance of about 10 years. The much smaller difference is in other populations like the people living in modern-day Nigeria and India.

In addition, scientists found that the difference in primate is much smaller than that of humans.

People around the world are living longer, healthier.

In this study, researchers look at the mortality rates of six different populations, detailing the three long-lived populations from a large international database called Co Human Mortality Databas , including the Swedish population from 1751-1759, the Swedish population of 2000-2009 and the population of Japan in 2012.

The researchers also looked at data from three populations with a much shorter overall life span, including two modern hunter-gatherer populations, Tanzania's Hadza tribe and the Ache clan of Paraguay, as well. like data from a liberated slave population, who emigrated from the US to Liberia between 1820 and 1843.

For non-human primates, the researchers looked at data collected from six wild populations of sifakas, muriquis, capuchins, gorillas, chimpanzees and baboons, each population ranges from 400 to 1,500.

Finally, the researchers also added data to human subjects by reviewing smaller data sets from 16 human populations, including residents in Russia, China, and India. , USA and other countries.

The study has three main findings: First , in the populations of long-lived populations, such as modern Japanese and Swedish people, the average life expectancy of people is quite consistent, meaning age. Death inside these pants is quite similar: Most deaths in these countries occur in the middle of late 70s and early 90s. In contrast, the life of other primates is much shorter and more variable.

Second , the longevity between those who live in industrial societies and those who live in hunter-gatherer societies is significantly different between the hunter-gatherers and non-human primates. Residents living in industrial societies live 30-50 years longer than the hunter-gatherers, but the hunter-gatherers live only 10-30 years longer than non-human primates. .

In all the population populations studied, the longest individuals tend to be female.

Third , women "tend to live longer and are less volatile" than men.

In all the population populations studied, the longest individuals tend to be female. However, for both primates and human populations with a shorter lifespan, male survival time seems relatively small.

The reason for this difference between men and women is still unclear, the researchers said. But this difference exists in many different groups, as well as in primates, showing the disparity that has " deeply evolved roots".

Another possible reason for this difference is "men are more at risk". If the life expectancy of men is cut short due to dangerous behaviors, this may explain the difference in life expectancy between men and women, as well as a large change in the age of male deaths. with women - Alberts said.

Another possibility is due to testosterone. Higher levels of testosterone in men can damage their immune systems, which can affect how long they live.

The research has just been published in the journal Proceedings of the National Academy of Sciences.