RT Journal Article SR Electronic T1 Effects of accelerated versus standard care surgery on the risk of acute kidney injury in patients with a hip fracture: a substudy protocol of the hip fracture Accelerated surgical TreaTment And Care tracK (HIP ATTACK) international randomised controlled trial JF BMJ Open JO BMJ Open FD British Medical Journal Publishing Group SP e033150 DO 10.1136/bmjopen-2019-033150 VO 9 IS 9 A1 Flavia K Borges A1 P J Devereaux A1 Meaghan Cuerden A1 Mohit Bhandari A1 Ernesto Guerra-Farfán A1 Ameen Patel A1 Alben Sigamani A1 Masood Umer A1 John Neary A1 Maria Tiboni A1 Vikas Tandon A1 Mmampapatla Thomas Ramokgopa A1 Parag Sancheti A1 Bobby John A1 AbdelRahman Lawendy A1 Mariano Balaguer-Castro A1 Richard Jenkinson A1 Paweł Ślęczka A1 Aamer Nabi Nur A1 Gavin C A Wood A1 Robert Feibel A1 John Stephen McMahon A1 Alen Sigamani A1 Bruce M Biccard A1 Giovanni Landoni A1 Wojciech Szczeklik A1 Chew Yin Wang A1 Jordi Tomas-Hernandez A1 Valsa Abraham A1 Jessica Vincent A1 Valerie Harvey A1 Shirley Pettit A1 Jessica Sontrop A1 Amit X Garg A1 , YR 2019 UL http://bmjopen.bmj.com/content/9/9/e033150.abstract AB Introduction Inflammation, dehydration, hypotension and bleeding may all contribute to the development of acute kidney injury (AKI). Accelerated surgery after a hip fracture can decrease the exposure time to such contributors and may reduce the risk of AKI.Methods and analysis Hip fracture Accelerated surgical TreaTment And Care tracK (HIP ATTACK) is a multicentre, international, parallel-group randomised controlled trial (RCT). Patients who suffer a hip fracture are randomly allocated to either accelerated medical assessment and surgical repair with a goal of surgery within 6 hours of diagnosis or standard care where a repair typically occurs 24 to 48 hours after diagnosis. The primary outcome of this substudy is the development of AKI within 7 days of randomisation. We anticipate at least 1998 patients will participate in this substudy.Ethics and dissemination We obtained ethics approval for additional serum creatinine recordings in consecutive patients enrolled at 70 participating centres. All patients provide consent before randomisation. We anticipate reporting substudy results by 2021.Trial registration number NCT02027896; Pre-results.