Context

Bariatric surgery is increasingly recognised as the gold-standard treatment for severe obesity, with long-term studies documenting substantial reduction in overall morbidity and mortality.1 ,2 In addition, an increasing number of short-term and medium-term studies show partial or full remission of type 2 diabetes in about 50% of patients undergoing bariatric surgery, and they also document its superiority in improving glycaemic control compared with conventional medical treatments.3–5 However, the long-term effect of bariatric surgery on the development of microvascular and macrovascular complications remains unknown.