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Obesity in teenagers linked to cancer

By Jennifer Cockerell

Published 26/05/2015

Adult obesity has long been associated with an increased risk of bowel cancer, the fourth most common form of cancer in the UK
Adult obesity has long been associated with an increased risk of bowel cancer, the fourth most common form of cancer in the UK

Very overweight or obese teenagers are at twice the risk of developing bowel cancer in middle age compared with their slimmer peers, a study has suggested.

Adult obesity has long been associated with an increased risk of bowel cancer, the fourth most common form of cancer in the UK.

Researchers in the US looked at the records of 240,000 men born between 1952 and 1956 who underwent a compulsory conscription assessment for the Swedish military during their late teens. Obesity is commonly defined as a body mass index (BMI) of 30 or more, while people with a BMI of 25 or more are considered overweight.

The majority (81%) of the participants they studied were of normal weight, but 1.5% fell into the upper overweight group (a BMI of 27.5 to 30) and nearly 1% were obese. Analysis of the men's health around 35 years later found 885 had been diagnosed with bowel cancer, with scientists finding that those who were in the upper overweight men group had a 2.08-fold higher risk of developing the condition while for obese men there was a 2.38-fold greater risk.

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