Murgue 2006.

Study characteristics
Methods	Parallel RCT Informed consents obtained Site: Feurs, France Data collection: 1 January 2003 to 1 January 2004 Funding: no information Registration: no information
Participants	45 participants with hip fracture Excluded: inability to rate their pain (evaluated with a Mini Mental score), contraindication to nitrous oxide, regional anaesthesia, allergy to study drugs, severe respiratory disease, thoracic trauma, renal dysfunction, pre‐fracture opioid treatment Type of fracture: neck femoral fracture Anaesthetic technique for surgery: no information Surgical technique: no information Mean age: 86 years (range 70 to 96) Percentage female: 82% Length of follow‐up: AD skin traction placement before surgery
Interventions	Intervention: femoral nerve block (N = 16) Comparator: no nerve block (N = 29); IV morphine (N = 14), or IV paracetamol and ketoprofen (N = 15) We retained only the IV morphine group as the comparator
Outcomes	Relevant to this review. Pain. Not relevant to this review. Maximal angle during passive elevation of fractured limb to elicit pain.
Notes	Conflict of interest: no information DOI: n/a Invalid email address Sources obtained for risk of bias assessment. Journal article with results of the trial.