Fan 2014.

Methods	Randomised clinical trial
Participants	186 participants 65 years of age or older undergoing elective unilateral total hip replacement Liberal group: n = 92; mean (SD) age = 75 (6) years Restrictive group: n = 94; mean (SD) age = 73 (7) years
Interventions	The liberal group received transfusion to maintain Hg greater than 10 g/dL. The restrictive group received transfusion for Hg less than 8 g/dL or when symptoms of anaemia developed.
Outcomes	Delirium, cerebrovascular accident, cardiac failure, myocardial infarction, pulmonary embolism, pneumonia, superficial wound infection, urinary tract infection, acute renal failure
Notes	‐
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	The trial used a random number table.
Allocation concealment (selection bias)	Low risk	The trial used a sealed envelope technique.
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	The blinding of participants and personnel was not described.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	The blinding of outcome assessment was not described.
Incomplete outcome data (attrition bias) All outcomes	Low risk	There was a low rate of missing data.
Selective reporting (reporting bias)	Low risk	No reporting bias was apparent.
Other bias	Low risk	No other bias was apparent.