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[Correspondence] Prophylactic repair to prevent midline incisional hernia

The PRIMA (PRImary Mesh closure of Abdominal midline wounds) trial by An Jairam and colleagues (Aug 5, 2017, p 567),1 provides relevant information on the outcomes of prophylactic repair of midline laparotomies for the prevention of incisional hernia. The trial shows significant reduction in the incidence of incisional hernia with onlay and sublay mesh reinforcement compared with primary suture only repair in patients with abdominal aortic aneurysm, but not in patients with a body mass index (BMI) greater than 27 kg/m2, contrary to the claim made by the authors of the PRIMA trial (ie, superior outcome of onlay mesh repair in patients with BMI greater than 27 kg/m2).