Yun 2009.

Study characteristics
Methods	Parallel RCT Approved by the ethics committee and written informed consents obtained Site: University Hospital, College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea Data collection: July 2007 to December 2007 Funding: departmental/institutional Registration: no information
Participants	40 ASA physical status I to III participants with isolated femoral neck fracture Mean age: not mentioned (range 62 to 88) Excluded: known allergy to amide local anaesthetics, haemorrhagic diathesis, peripheral neuropathy, mental disorder Type of fracture: Garden’s classification III or IV femoral neck fracture Anaesthetic technique for surgery: spinal block Surgical technique: bipolar hemi‐arthroplasty (82.5%), closed reduction and internal fixation with compression hip screw (12.5%), or total hip replacement arthroplasty (5%) Mean age: 75 years (range 62 to 88) Percentage female: 65% Length of follow‐up: 24 hours
Interventions	Intervention: fascia iliaca compartment block (N = 20) Comparator: no nerve block (N = 20)
Outcomes	Relevant to this review. Pain. Opioids. Participant satisfaction (categorical score). Complications. Not relevant to this review. Cognitive function. Opioid side effects. Haemodynamic variables.
Notes	Conflict of interest: "no conflict of interest" DOI: 10.1111/j.1399‐6576.2009.02052.x Email sent on 5 January 2020; additional information received from study authors Sources obtained for risk of bias assessment. Journal article with results of the trial. Conference abstract about the trial. Personal communication with trialist.

ASA: American Society of Anesthesiologists physical status.

CSF: cerebrospinal fluid.

DSM: Diagnostic and Statistical Manual of Mental Disorders.

ECG or EKG: electrocardiogram.

ED: emergency department.

FNB: femoral nerve block.

G: gram.

h: hour.

IM: intramuscular.

IQR: interquartile range.

IV: intravenous.

mcg: microgram.

mg: milligram.

mL: millilitre.

N: number

n/a: not available.

PCA: patient‐controlled analgesia.

RCT: randomized controlled trial.

SC: subcutaneous.

SD: standard deviation.

VAS or VRS: visual or verbal analogue/response scale.