A new study shows that a body index (BMI) greater than 30 is associated with a greater risk of depression.
A team from the University of South Australia and University of Exeter (UK) has studied the case of over 48,000 people suffering from depression and belonging to the British biobank choir. This large long-term study provides access to genomic data for British residents aged 37-73.
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 a higher BMI and a lower risk of diseases such as diabetes, to check whether health problems related toobesity was at the origin of Depression.
The association seems to be more important women than in men.
We are talking about obesity from a BMI greater than 30 kg / m2, BMI calculated by dividing weight in kg in height in square meters.
The researchers noticed that very thin men and low BMI are more prone to depression than those with a weight considered in the norm or the very thin women.
"The current overweight epidemic is very worrying"explains Professor Elina Hypponen, who led the study."With depression, the international community costs $ 1 billion a year, according to estimates. "
"Our research shows that obesity not only increases the risk of chronic diseases such as cancer and cardiovascular problems: it can also lead to depression."
The study is not the first to establish a link between BMI and depression. By 2016, researchers have already concluded that a woman with a BMI between 30 and 34.9 was twice as high as the risk of depression compared to a woman with a weight in the norm. Researchers at Brigham & Women's Hospital in Boston, USA, presented results last year, indicating that women with high BMI also presented a risk to postpartum depression important.
A Dutch study presented at the European Congress for Obesity in 2017 also suggested that overweight children At age 8 or 13, three times more likely to fall in depression later in life.