Too many extra kilos shorten life by up to eight years. Simple calculation that helps you find out if you are at risk

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Too many extra kilos shorten life by up to eight years. Obesity and severe obesity can shorten the life expectancy by eight years and up to 19 years when the health is good, says a study.

Led by Professor Steven Grover of McGill University (Montreal) and published in The Lancet Diabetes & Endocrinology, the research is the result of mathematical modeling, starting from a large American database ("NHANES" 2003-2010), which contains the data of thousands of adults, between the ages of 20 and 79 years.

The results are clear: the more a person is overweight, the more important the impact on his or her health will be, summarizes the epidemiologist.

The study shows that obesity is associated with an increased risk of developing cardiovascular disease, such as myocardial infarction and stroke, but also diabetes, which significantly reduces life expectancy and healthy life years, compared to normal weight people, he explains. Grover.

According to the study, overweight people lose up to 3 years of life expectancy, obese people (with body mass index 25-30) between 1 and 6 years, and those with severe obesity between 1 and 8 years of life expectancy.

The most important decrease in life expectancy in overweight people was recorded among young people between the ages of 20 and 29. Also, in people with severe obesity, the period of living in good health can be reduced by up to about 19 years.

WHO recognizes that, in this century, obesity has an equal or greater prevalence compared to malnutrition and infectious diseases. Therefore, in the absence of drastic measures of prevention and treatment, by 2025 over 50% of the world's population will be obese. Obesity is therefore a chronic disease, with a very high prevalence and affecting men and women of all races and ages. Pre-obesity and obesity are major public health issues and need a common strategy, which includes promoting healthy eating habits and a more active lifestyle, as well as appropriate treatment and care.
Body Mass Index (BMI) is an index commonly used to classify overweight and obesity in adults. It is defined as the weight of a person in kilograms divided by the square of his height in meters (kg / m2).
For adults, WHO defines overweight and obesity as follows: overweight is a BMI greater than or equal to 25; and obesity is a BMI greater than or equal to 30.

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