Antonopoulou 2006.

Methods	RCT Setting: Greece Funding; unspecified
Participants	84 participants (63 female and 21 male) with hip fracture
Interventions	Treatment group: continuous femoral nerve block with 0.125% levobupivacaine at 3‐4 mL/h, started after surgery (n = 49) Control group: IM pethidine (n = 35) Spinal anaesthesia and paracetamol after surgery for all participants
Outcomes	Pain scores during 24 hours (not included in analysis)
Notes	No complications such as motor blockade, local haematoma or infection, inadvertent arterial puncture, direct nerve damage and cardiovascular or neurological toxicity Conference abstract Email sent on 25 May 2015: no reply
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	High risk	"randomized", no details. Unequal groups: 48 and 35
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	None lost to follow‐up No failed block Five accidental catheter dislodgements ‐ 4 during procedure of securing the catheter, 1 on the ward
Selective reporting (reporting bias)	Low risk	All measurements mentioned in methods section given in results section
Other bias	Unclear risk	No details for each group separately