Hadimioglu 2012.

Methods	RCT Approved by the ethics committee and written informed consent obtained Setting: Turkey Funding: unspecified
Participants	46 non‐diabetic patients aged between 18 and 65 years who were scheduled for living‐related renal transplantation
Interventions	Treatment group: LEA (L1‐L2) with 14 to 18 mL of bupivacaine 0.5% during surgery and morphine after surgery (n = 21) Control group: IV PCA with morphine (n = 25) General anaesthesia for all participants
Outcomes	Hospital LOS
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	No details
Allocation concealment (selection bias)	Unclear risk	Not mentioned
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Not mentioned
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not mentioned
Incomplete outcome data (attrition bias) All outcomes	Low risk	Reason for exclusion provided
Selective reporting (reporting bias)	Low risk	All results reported
Other bias	Unclear risk	Groups well balanced Participants who needed a blood transfusion owing to extreme haemorrhage or with severe haemodynamic instability intraoperatively, as well as those with problems with the epidural catheter, were excluded from the study