Jang 2018.

Study characteristics
Methods	Parallel RCT Approved by the ethics committee and informed consents obtained Site: Hallym University, Chuncheon Sacred Heart Hospital, Department of Anesthesiology, Chuncheon, Korea Data collection: no information Funding: governmental Registration: KCT0001702
Participants	32 participants 60 years of age or older, radiographically proven and isolated femoral neck fracture, normal distal neurovascular status, moderate to severe (≥ 5) verbal/visual analogue scale pain score Excluded: refused to participate or with known history of study drug allergy, previous femoral vascular surgery on same side of the fracture, inability to understand the study protocol Type of fracture: femoral neck fracture Anaesthetic technique for surgery: not mentioned Surgical technique: not mentioned Mean age: 75.6 years (range 61 to 90) Percentage female: 70% Length of follow‐up: 48 hours
Interventions	Intervention: femoral nerve block (N = 16) Comparator: sham block with saline (N = 16)
Outcomes	Relevant to this review. Pain (all measurements before surgery). Opioid (before surgery). Not relevant to this review. Inflammation. Opioid side effects. Desaturation.
Notes	Conflict of interest: none DOI: 10.1016/j.bjan.2018.03.004 Email sent on 5 January 2020 Sources obtained for risk of bias assessment. Journal article with results of the trial.