Yamamoto 2016.

Study characteristics
Methods	Parallel RCT Approved by the ethics committee and informed consent obtained Site: Shimane University Faculty of Medicine, Shimane, Japan Data collection: October 2016 to January 2018 Funding: departmental/institutional Registration: JPRN‐UMIN0 0 0 024147
Participants	53 ASA I or II participants over 50 years of age with acute proximal hip fracture Excluded: poorly controlled diabetes mellitus, defined as haemoglobin A1c level > 7.0%; neurological disease; history of allergy to study drugs; serious systemic comorbidity; bleeding disorder; previous surgery in affected hip; regular opioid therapy; infection at injection site; open fracture; multiple injuries requiring pain medications or other surgeries; impaired cognition or dementia; delirium at admission Type of fracture: femoral neck (39.6%) or pertrochanteric (60.4%) femur fracture Anaesthetic technique for surgery: spinal block Surgical technique: internal fixation (84.9%) or bipolar hemi‐arthroplasty (15.1%) Mean age: 84.6 (range not stated) Percentage female: 84.9% Length of follow‐up: 7 days
Interventions	Intervention: fascia iliaca compartment block (N = 25) Comparator: no nerve block (N = 28)
Outcomes	Relevant to this review. Pain. Acute confusional state. Time to first mobilization after surgery. Complications. Not relevant to this review. Rescue analgesia.
Notes	Conflict of interest: "there are no conflicts of interest to declare" DOI: 10.1016/j.injury.2019.03.008 Email sent on 5 January 2020 Sources obtained for risk of bias assessment. Journal article with results of the trial. Non‐commercial trial registry record.