Scientists Have Clarified What People With Excess And Underweight Are At Risk Of Dying From

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Scientists Have Clarified What People With Excess And Underweight Are At Risk Of Dying From
Scientists Have Clarified What People With Excess And Underweight Are At Risk Of Dying From

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Scientists have clarified what people with excess and underweight are at risk of dying from

Excessively high and excessively low body mass index (BMI) are associated with an increased risk of death from virtually all major causes, with the exception of road accidents.

Scientists have clarified what people with excess and underweight are at risk of dying from
Scientists have clarified what people with excess and underweight are at risk of dying from

Jay and Silent Bob. Photo: Wikipedia Commons /

Excessively high and excessively low body mass index (BMI) are associated with an increased risk of death from virtually all major causes, with the exception of road accidents.

A study published October 31 in The Lancet Diabetes and Endocrinology and conducted by researchers at the London School of Hygiene and Tropical Medicine found that too high or too low a BMI is associated with increased incidence from a range of common diseases.

The study's lead author, Krishnan Bhaskaran, noted that they found "important links" between BMI and most causes of death.

“BMI is a key indicator of health. We know that BMI is associated with the risk of death in general, but surprisingly little research has been done so far examining mortality from specific causes. We have filled this gap to help researchers, patients and doctors better understand the fact that both underweight and overweight can be associated with diseases such as cancer, respiratory disease and liver disease,”says Bhaskaran.

BMI is determined by dividing a person's weight in kilograms by the square of their height in meters. The indicator is measured in kilograms per square meter (kg / m 2)

The authors found that the BMI is in the range of 21 to 25 kg / m 2 is associated with the lowest mortality rate. They also found that BMI outside this range is associated with almost all causes of death, not just the most common diseases. This means that a BMI that is below or above the optimal range leads to an increased risk of mortality.

The study, which analyzed data from 3.6 million people and 367,512 deaths, found that obesity (BMI = 30 and above) is associated with an increased risk of two major causes of death: heart disease and cancer.

“A BMI over 25 is associated with most cancers, most of the cardiovascular and respiratory diseases, as well as liver and kidney disease,” Bhaskaran said.

The researchers also found that obesity reduces life expectancy by an average of 4.2 years for men and 3.5 years for women, and may contribute to other chronic diseases, including respiratory disease, liver disease, and diabetes.

The British journal Cancer already reported in April that obesity is associated with 7.5% of cancers in women in the UK.

The study also found that being underweight is surprisingly linked to a variety of causes of death and illness, including dementia, Alzheimer's, cardiovascular disease, and suicide.

However, Bhaskaran noted that the study on the association between low BMI and mortality was observational, as it was not clear if low weight was a direct cause of illness or a sign of poor health in general.

He also acknowledged some of the study's limitations, including the lack of data on the diet or physical activity level of the participants.

However, he noted that the results confirmed the importance of maintaining a BMI between 21 and 25.

In particular, the results showed that the lowest risk of death from cardiovascular disease is associated with a BMI of 25 kg / m 2, and each additional 5 kg / m 2 are associated with increased risk of death by 29%.

The lowest risk of dying from cancer was recorded at a BMI of 21 kg / m 2, with every additional 5 kg / m 2 weight loss being associated with a 13% increased risk of death.

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