Ten times more children and adolescents obese than 40 years ago
- A new report finds 124 million children around the world were obese in 2016
- 192 million were estimated to be moderately or severely underweight that same year
Looking at the broader picture, this equated to roughly 5.6% of girls and 7.8% of boys being obese last year.
Most countries within the Pacific Islands, including the Cook Islands and Nauru, had the highest rates globally, with more than 30% of their youth ages 5 to 19 estimated to be obese.
“More recently, they have plateaued in higher-income countries, although obesity levels remain unacceptably high,” he said.
Over the same time period, the rise in obesity has particularly accelerated in East and South Asia.
“We now have children who are gaining weight when they are 5 years old,” unlike children at the same age two generations ago, Ezzati told CNN.
In the largest study of its kind, more than 1,000 researchers collaborated to analyze weight and height data for almost 130 million people, including more than 31 million people 5 to 19 years old, to identify obesity trends from 1975 to 2016.
“Rates of child and adolescent obesity are accelerating in East, South and Southeast Asia, and continue to increase in other low and middle-income regions,” said James Bentham, a statistician at the University of Kent, who co-authored the paper.
Obesity in adults is defined using a person’s body mass index, the ratio between weight and height. A BMI of 18.5 to 24.9 is classified as a healthy weight, 25 to 29.9 considered overweight and 30 and over obese. Cut-offs are lower among children and adolescents and vary based on age.
“While average BMI among children and adolescents has recently plateaued in Europe and North America, this is not an excuse for complacency as more than one in five young people in the U,S. and one in 10 in the UK are obese,” he said.
Greater risk as an adult
Being obese as a child comes with a high likelihood of being obese as an adult and the many health consequences that come with it, including the increased risk of diabetes, cardiovascular disease and some cancers.
The potential for these chronic conditions into adulthood also puts an increased burden on health systems — and financial constraints on individuals.
“We are seeing very worrying trends with pediatricians who have children come in as young as 7 with type 2 diabetes,” said Temo Waqanivalu, programme officer for population-based prevention of non-communicable diseases at the World Health Organization. WHO co-led the research with Imperial College London.
Type 2 diabetes is typically an adult-onset condition, he told CNN.
The new research also revealed ongoing problems on the other end of the body mass spectrum — being underweight — with 192 million estimated to be moderately or severely underweight worldwide in 2016. In adults, being underweight is defined as a BMI under 18.5.
Unlike the obesity trend, the number of children and adolescents who are underweight has been declining globally since 1975, the paper found, but numbers remain high.
For example, in India and Pakistan, 50.1% and almost 41.6% of girls, respectively, were underweight in 2016 — down from 59.9% and 54% in 1975. Numbers were similar among boys in 2016, at 58.1% and 51%, respectively.
Being underweight comes with its own health consequences among children and adolescents, including a greater risk of infectious disease and potential harm during pregnancy for adolescents and women old enough to have children.
“We mustn’t forget that undernutrition remains a major global public health problem,” commented Dr. Frank Hu, professor of nutrition and epidemiology at the Harvard T.H. Chan School of Public Health in the United States. Hu was not involved in the research.