Parker 2015.

Methods	RCT (sealed opaque envelope) Approval from Research and Development Committe obtained Written informed consent obtained No external source of funding Between June 2007 and November 2012
Participants	322 participants aged over 49 years of age presenting to one hospital with an acute hip fracture. Patients with dementia were included if their next was willing to allow their relative to participate in the trial. Patients with more than one injury were also included if spinal anaesthesia was suitable. Exclusion criteria: patients who expressed a preference to a particular method of anaesthesia or for whom the surgeon considered one of the anaesthetic technique being more appropriate
Interventions	Intervention: spinal anaesthesia (n = 158 randomised, 13 switched to general anaesthesia and one lost to follow‐up at 68 days) Control: general anaesthesia (n = 164 randomised, 6 switched to spinal anaesthesia)
Outcomes	Mortality (unblinded at 30, 90 and 120 days and at one year) Myocardial infarction Pneumonia Thromboembolic complications (pulmonary embolism or deep venous thrombosis) Cerebrovascular accident Acute kidney injury Urine retention Number of blood units transfused Intraoperative hypotension Gastrointestinal bleeding Pressure sores Wound infection Congestive heart failure Cardiac arrhythmia Length of hospital stay Discharge to same residence
Notes	Participants were assessed at 6 weeks and by a telephone interview at one year. ISRCTN36381516