A new study will be undertaken to ascertain which type of obesity surgery is the most effective.
Obesity is a growing problem in the UK with a government-commissioned foresight report revealing that if current trends continue, then by 2050, 60 per cent of men and 50 per cent women in the country will be obese.
Professor Jane Blazeby, consultant upper GI surgeon in the School of Social and Community Medicine at the University of Bristol, said currently patients who do not respond to other treatment methods undergo either gastric bypass or gastric banding procedures.
The BY-BAND report, led by professor Blazenby, will compare the weight loss and quality of life changes that occur in patients for up to three years after they receive one of the operations.
It is thought this process will test around 700 obesity patients in total and anyone referred for obesity surgery can opt to take part in the study.