The research, led by scientists from Imperial College London and using data from most countries in the world, has tracked the heights of young adult men and women between 1914 and 2014. The size of more than 18 million people in 200 countries has been analyzed, and the data shows that height is stagnating in some rich countries while it grows unstoppably in other traditionally less favored areas of the world. Height is strongly influenced by nutrition and environmental factors, and therefore related to health, although an individual’s genetic factors can also play a role. Among the findings, published in the journal eLife , the research revealed that it is South Korean and Iranian women and men who have shown the greatest increases in height over the last 100 years: Iranian men have increased an average of
South Korean women about 20.2cm. Two Cambodia Email List groups from the IMIM Epidemiology and Public Health Program participated in this study: the Research Group in Cardiovascular Epidemiology and Genetics, which contributed 11,000 people from the REGICOR project database, and the Research Group in Clinical and Molecular Epidemiology of the Cancer. The height of men and women in the UK has increased by around 11cm over the past century. In comparison, the height of men and women in the United States has increased by 6 cm and 5 cm, while the height of Chinese men and women has increased by around 11 cm and 10 cm. The researchers also found that some countries have stopped growing in the past 30 to 40 years, despite showing initial increases at the beginning of the study, such as the US, UK,
Finland and Japan. In contrast, Spain and Italy and many countries in Latin America and East Asia continue to increase in height. Some countries, particularly those in sub-Saharan Africa, North Africa, and the Middle East, have even seen a decline in mean height over the past 30 to 40 years. Height is strongly influenced by nutrition and environmental factors, although an individual’s genetic factors can also play a role. Children and adolescents who are better nourished and live in better environments tend to be taller, and height can even be influenced by the health and nutrition of the mother during pregnancy. It has permanent consequences for health and even education and income. Some research suggests that people who are taller tend to live longer, get a better education, and even earn more.