A new study shows that a body mass index (BMI) greater than 30 is associated with a greater risk of depression.
A team from the University of South Australia and the University of Exeter (UK) has studied the case of more than 48,000 people suffering from depression and belonging to the British Biobank group. This large, long-term study provides access to genomic data for British residents aged 37 to 73 years.
The researchers also formed a control group of 290,000 people born between 1938 and 1971.
Using this information, they analyzed the genes associated with higher BMI and a lower risk for diseases such as diabetes in order to check whether the health problems associated withobesity was his origin depression.
The club seems to be more important among them women in relation to men.
We are talking about obesity by one BMI greater than 30 kg / m2, the BMI is calculated by dividing the weight in kilograms per height in square meters.
The researchers have noticed this very thin men and low BMI are more prone to depression than those with the weight taken into account by the rule or that very thin women.
"Today's epidemic of obesity is very worrying"explains Professor Elina Hypponen, who drew up the study."With depression, the international community costs $ 1 trillion a year, according to estimates. »
"Our research shows that overweight not only increases the risk of chronic conditions such as cancer and cardiovascular problems: it can also lead to depression."
The study is not the first to link BMI to depression. In 2016, researchers have already come to the conclusion that a woman with BMI between 30 and 34.9 was twice the risk of depression compared to a woman weighing in the standard. Researchers at Brigham & Women Hospital in Boston, USA presented last year's results women with high BMI also presented a risk postpartum depression more important.
A Dutch study presented at the European Convention on Obesity in 2017 also proposed it overweight children at age 8 or 13, were three times more likely to fall into depression later in life.