Over one billion people globally living with obesity: Lancet study


PTI, Mar 1, 2024, 9:09 AM IST

The total number of children, adolescents and adults worldwide living with obesity has surpassed one billion, according to a global analysis published in The Lancet journal.

These trends, together with the declining prevalence of people who are underweight since 1990, make obesity the most common form of malnutrition in most countries, the researchers said.

The analysis of global data by the NCD Risk Factor Collaboration (NCD-RisC) and the World Health Organization (WHO) estimates that among the world’s children and adolescents, the rate of obesity in 2022 was four times the rate in 1990.

Among adults, the obesity rate more than doubled in women and nearly tripled in men. In total, 159 million children and adolescents and 879 million adults were living with obesity in 2022, according to the study.

Between 1990 and 2022, the proportion of the world’s children and adolescents who were affected by underweight fell by around one-fifth in girls and more than one-third in boys. The proportion of the world’s adults who were affected by being underweight more than halved over the same period..

Obesity and underweight are both forms of malnutrition and are detrimental to people’s health in many ways. The latest study provides a highly detailed picture of global trends in both forms of malnutrition over the last 33 years.

“It is very concerning that the epidemic of obesity that was evident among adults in much of the world in 1990 is now mirrored in school-aged children and adolescents,” said senior author Professor Majid Ezzati, from Imperial College London in the UK.

“At the same time, hundreds of millions are still affected by undernutrition, particularly in some of the poorest parts of the world. To successfully tackle both forms of malnutrition it is vital we significantly improve the availability and affordability of healthy, nutritious foods,” Ezzati said.

The researchers analysed weight and height measurements from over 220 million people aged five years or older (63 million people aged five to 19 years, and 158 million aged 20 years or older), representing more than 190 countries.

Over 1,500 researchers contributed to the study, which looked at body mass index (BMI) to understand how obesity and underweight have changed worldwide from 1990 to 2022.

From 1990 to 2022, global obesity rates more than quadrupled in girls and boys, with increases seen in almost all countries, the study found.

The proportion of underweight girls fell from 10.3 per cent in 1990 to 8.2 per cent in 2022, and for boys, it fell from 16.7 per cent to 10.8 per cent, the researchers said.

Among girls, a decrease in the rates of underweight was detected in 44 countries, whilst among boys, a decrease was noted in 80 countries, they said.

The total number of children and adolescents who were affected by obesity in 2022 was nearly 160 million (65 million girls and 94 million boys), compared to 31 million in 1990. Whereas 77 million girls and 108 million boys were underweight in 2022, decreasing from 81 million for girls and 138 million for boys in 1990.

In adults, obesity rates more than doubled among women and nearly tripled in men between 1990 and 2022. The proportion of adults who were underweight halved between 1990 and 2022.

In total, an estimated nearly 880 million adults were living with obesity in 2022 (504 million women and 374 million men), four and a half times the 195 million recorded in 1990 (128 million women and 67 million men), the researchers said.

In all age groups, the combined burden of both forms of malnutrition increased in most countries between 1990 and 2022, driven by increasing obesity rates.

However, the double burden of malnutrition declined in many countries in South and Southeast Asia, and in some countries in Africa for men, where the rate of underweight fell steeply.

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