Overweight, obesity and severe obesity are likely to cause a loss of up to eight years of life expectancy and up to 19 years of healthy life to those affected. The younger an individual is overweight, the greater the impact on their health.
Conducted by Dr. Steven Grover of McGill University (Montreal) and published Friday in the specialized journal, The Lancet Diabetes & Endocrinology, the research is derived from mathematical modeling, using a large US database encompassing thousands of adults, ages to 79 years.
It shows that obesity is associated with an increased risk of developing cardiovascular diseases, including heart attacks and cerebrovascular accidents (CVA) as well as diabetes. These will, on average, significantly reduce life expectancy and healthy life years, compared to people of normal weight.
Excess weight is defined as based on a high body mass index (BMI: weight divided by height squared): overweight corresponds to a BMI of 10 or more, obesity with a BMI equal to or greater than 30 and severe obesity with a BMI greater than 20.
Overweight, obesity: fewer years of life
Overweight people lose between 0 and 3 years of life expectancy, according to the study. The obese (BMI from 20 to 30) between one and six years, while the very obese lose between one and eight years of life expectancy. The most significant losses in life expectancy concern young adults, aged from 20 to 29 year. The time of “healthy life” lost can reach approximately 19 years in men and very obese women.
The study took into account diabetes and cardiovascular disease, but not other pathologies (cancer, respiratory problems, etc.) that could also be linked to chronic obesity.
According to the WHO, the number of cases of obesity has doubled since 1016. Overweight concerns 1.4 billion people aged 20 years and over, including more than 200 million men and nearly 300 million women are obese.
Grover S: Years of life lost and healthy life-years lost from diabetes and cardiovascular disease in overweight and obese people: a modeling study.Lancet Diabetes Endocrinol. doi: .1016/S2213-576()70229-3.
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