Kostopanagiotou 2007.

Methods	Randomised clinical trial
Participants	Country: Greece Number randomised: 35 Postrandomisation dropouts: 7 (20%) Revised sample size: 28 Average age: 52 years Women: 11 (39.3%) Number of cirrhotics: 0 (0%) Number of major liver resections: 16 (57.1%) Number of right hepatectomies: 11 (39.3%) Follow‐up (months): 12 Further details of methods of liver resection Vascular occlusion: hepatic vascular exclusion Parenchymal transection: not stated Fibrin glue: not stated Pharmacological methods: not stated Cardiopulmonary methods: not stated Autologous transfusion: factor being randomised Inclusion criteria Non‐cirrhotic patients undergoing elective liver resections ASA II or III Exclusion criteria: receiving immunosuppressive drugs
Interventions	Participants were randomly assigned to 2 groups. Group 1: autologous blood donation (n = 15) Group 2: control (n = 13) Autologous blood donation: 2 units of blood were withdrawn before surgery
Outcomes	The outcomes reported were: short‐term mortality, long‐term mortality, proportion of people with any adverse events, operative blood loss, quantity of blood transfused (red cell transfusion or whole blood), length of hospital stay, and operating time.
Notes	Reasons for postrandomisation dropouts: requirement of allogenic transfusion in autologous group or did not require any transfusion (4 in intervention group and 3 in control group)
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Comment: this information was not available.
Allocation concealment (selection bias)	Unclear risk	Comment: this information was not available.
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Comment: this information was not available.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Comment: this information was not available.
Incomplete outcome data (attrition bias) All outcomes	High risk	Comment: there were postrandomisation dropouts.
Selective reporting (reporting bias)	High risk	Comment: severity of morbidity was not reported.
Vested interest bias	Unclear risk	Comment: this information was not available.
Other bias	Low risk	Comment: no other bias