#1	‘hip fracture’/exp OR ‘hip fracture’ OR ‘hip fractures’ OR ‘femur subtrochanteric fracture’/exp OR subtrochanteric NEAR/2 fracture* OR ‘femur intertrochanteric fracture’/exp OR intertrochanteric NEAR/2 fracture* OR ‘femur fracture’/exp OR femoral NEAR/2 fracture* OR ‘trochanteric fracture’ OR ‘trochanteric fractures’ OR ‘hip’/exp OR ‘hip’:ab,ti
#2	‘delirium’/exp OR delirium OR ‘cognitive defect’/exp OR ‘cognitive defect’ OR ‘cognitive defects’ OR ‘cognitive disorder’ OR ‘cognitive disorders’ OR ‘cognitive deficit’ OR ‘cognitive deficits’ OR ‘cognitive dysfunction’ OR ‘cognitive impairment’ OR ‘cognitive impairments’ OR ‘organic mental disorder’ OR ‘organic mental disorders’ OR ‘traumatic psychosis’ OR ‘nonpsychotic organic brain syndrome’ OR ‘organic brain syndrome’/exp OR ‘oragnic brain syndrome’ OR ‘organic brain disease’ OR ‘confusion’/exp OR confusion OR ‘disorientation’ OR ‘organic brain disorder’ OR ‘organic brain disorders’ OR confus* OR delir* OR ‘psychosis’/exp OR ‘psychosis’ OR intraoperative AND (‘complication’/exp OR complication) OR ‘intraoperative complication’ OR ‘intraoperative complications’ OR ‘intra-operative complication’ OR ‘intra-operative complications’ OR ‘perioperative complication’ OR ‘perioperative complications’ OR ‘peri-operative complication’ OR ‘peri-operative complications’
#3	‘orthopedics’/exp OR ‘orthopedic’ OR ‘orthopedics’ OR ‘orthopaedic’ OR ‘orthopaedics’ OR ‘orthopedic surgery’/exp OR ‘surgery’/exp OR ‘surgery’ OR surgi* OR ‘operative procedure’ OR ‘operative procedures’ OR ‘intraoperative period’/exp OR ‘intraoperative period’ OR ‘intraoperative periods’ OR ‘intra-operative complication’ OR ‘intra-operative complications’ OR ‘perioperative period’/exp OR ‘perioperative period’ OR ‘perioperative periods’ OR ‘perioperative complication’/exp OR ‘perioperative complication’ OR ‘perioperative complications’ OR ‘peri-operative complication’ OR ‘peri-operative complications’
#4	#1 AND #2 AND #3