Neuman 2016.

Methods	RCT Institutional review board approval obtained Written informed consents obtained Between July 2014 and March 2015
Participants	12 participants aged 18 or older, femoral neck or pertrochanteric hip fracture requiring surgery, and ability to speak English and provide written informed consent. Exclusion criteria were pathological or periprosthetic fracture, concurrent conditions requiring surgery (e.g., multitrauma, acute cholecystitis), Montreal Cognitive Assessment4 score less than 16, delirium at time of screening, known contraindications to spinal anaesthesia or volatile general anaesthetics, and pregnancy.
Interventions	Intervention: spinal anaesthesia with sedation (n = 6) Control: general anaesthesia (n = 6)
Outcomes	Primary outcome: New diagnosis of delirium assessed with the Montreal Cognitive Assessment, and a delirium screen using the Confusion Assessment Method during postoperative day 1 through 5 or discharge whichever came first (blinded assessment)
Notes	ClinicalTrials.gov identifier NCT02190903