ISRCTN31224450.

Trial name or title	Negative pressure therapy in large incisional hernia surgery
Methods	Randomised controlled trial (case‐control)
Participants	Patients undergoing elective surgery for incisional hernia with diameters exceeding 10 cm
Interventions	Negative pressure wound therapy versus traditional dressing
Outcomes	Primary: volume accumulated in the drains every 24 hours in millilitres; number of days needed to reduce this volume under 50 mL per 24 hours Secondary: postoperative complications; cost
Starting date	1 February 2013
Contact information	drcarlesolona@gmail.com
Notes