Childhood trauma could lead to adult obesity

http://news.cision.com/karolinska-institutet/r/childhood-trauma-could-lead-to-adult-obesity,c9637036

Sept. 2, 2014

Being subjected to abuse during childhood entails a markedly increased risk of developing obesity as an adult. This is the conclusion of a meta-analysis carried out on previous studies, which included a total of 112,000 participants. The analysis was conducted by researchers at Karolinska Institutet in Sweden, and has been published in the journal Obesity Reviews.

“The study clearly shows that difficult life events leave traces which can manifest as disease much later in life. The mechanisms behind this process include stress, negative patterns of thought and emotions, poor mental health, increased inflammation, as well as lowered immune function and metabolism,” says Erik Hemmingsson, researcher at the Huddinge Department of Medicine at Karolinska Institutet, who is also linked to the Karolinska University Hospital's Obesity Centre in Huddinge, Stockholm County.

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“These findings indicate causality, where the abuse is the cause of the obesity later in life. However, not everyone who is subjected to abuse will develop obesity, and not all obese individuals have been abused, so there are obviously other causes too. At the same time, it is important to remember that child abuse is more common than we think, and it needs to be brought to light. Between five and ten per cent of the adult population say that they have been subjected to some form of abuse during childhood,” says Erik Hemmingsson.

In another recently published paper, Erik Hemmingsson has developed a new theoretical model for how stressful childhood experiences increase the risk of obesity, via psychological and emotional factors. These factors impact negatively on appetite regulation, metabolism, eating behaviour, sleep, inflammation and cognitive function – which in turn pave the way for obesity. Erik Hemmingsson hopes that the published studies might help disprove the many preconceptions that exist about people who are overweight, as they show that obesity is caused by so many other factors than overeating or a sedentary lifestyle.

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tags: child abuse