ISHI 2013.

Methods	Double‐blind RCT
Participants	People requiring thromboprophylaxis
Interventions	UFH compared to LMWH (enoxaparin)
Outcomes	‐ DVT and PE ‐ Major bleeding defined as requirement of urgent blood transfusion or fatal ‐ HIT defined as platelet count dropping to half or less than half of admission value after starting thromboprophylaxis
Notes	We contacted study authors aiming to clarify the definition of HIT and the availability of data on the subgroup of postoperative participants. No response received as yet

DVT: deep vein thrombosis
 HIT: heparin‐induced thrombocytopenia
 LMWH: low molecular weight heparin
 PE: pulmonary embolism
 RCT: randomised controlled trial
 UFH: unfractionated heparin