Paris – The rapidly growing birth rate in developing countries has sparked a worldwide baby boom, but women in dozens of rich countries are not able to raise enough children to maintain their populations.
A global overview of birth, death and disease incidence rates, measured by thousands of data sets on a country-by-country basis, reveals that heart disease is the leading cause of death worldwide.
Bill and Melinda Founded at the University of Washington by the Gates Foundation, the Institute for Health Metrics and Evaluation (IHME) has compiled one of the world's most detailed images using more than 8,000 data sources (over 600 new data sources). public health.
Their sources included domestic research, social media and open source materials.
The world's population grew from 2.6 billion in 1950 to 7.6 billion last year, but the population growth was heavily uneven depending on region and income.
According to IHME's study, 91 countries, mainly in Europe and North America and South America, have not raised enough children to maintain their current population.
But in Africa and Asia, fertility rates have continued to rise and there are Niger women who have given birth to seven children throughout their lives.
Ali Mokdad, professor of health measurement science at IHME, told AFP that education is the most important factor in determining population growth.
"It does not fit socio-economic factors, but it is a function of women's education," he said. "When a woman is educated more, she has spent more time at school, and because she is postponing pregnancy, the number of babies will decrease."
IHME has shown that Cyprus is the most fertile country on earth and an ordinary woman has only one birth at birth.
Conversely, Mali, Chad and Afghan women have an average of six babies.
The United Nations predicts there will be over 10 billion people on Earth by mid-century. This is similar to IHME's expectation.
This raises the question of how many people our world can support, known as the "capacity" of the Earth.
Mokdad said the economy is generally growing while the population of developing countries continues to grow.
This typically has a knock-on effect on the fertility rate over time.
"The population is still growing in Asia and Africa, and people are moving from poverty to better income unless there is war or anxiety."
"The country is expected to be better economically, and fertility is likely to decline and level out."
Not only has billions more grown than 70 years ago, but also longer than before.
The study, published in the Lancet Medical Journal, found that the average life expectancy of men increased from 48 to 71 years in 1950. Women are now expected to live in the age of 76 in 1950 compared to 53.
Living longer will bring health problems. It puts more burden on our health care system.
IHME said heart disease is now the leading cause of death worldwide. In 1990, neonatal disease was the most common, followed by lung disease and diarrhea.
Uzbekistan, Ukraine and Azerbaijan had the highest mortality rates from heart disease. Korea, Japan and France were the lowest.
"As the country gets richer, the death toll from the epidemic will be reduced, but more people will live if they live longer," said the pastor.
He pointed out that since 1990, deaths from infectious diseases such as malaria and tuberculosis have dropped significantly, but a new non-infectious killer has taken its place.
"There are certain behaviors that lead to cardiovascular disease and cancer. Obesity is number one, year by year, and our actions are contributing to it."