S1	(MM “Hip”) OR hip* OR (MM “Hip Fractures, Stress”) OR (MM “Hip Fractures”) OR (MM “Hip Surgery”) OR subtrochanteric fracture* OR trochanteric fracture* OR femoral neck fracture* OR (MM “femur neck”) OR femur neck fracture*
S2	(MM “Delirium”) OR (MM “Delirium, Dementia, Amnestic, Cognitive Disorders”) OR (MM “Organic Mental Disorders”) OR (MM “Confusion”) OR (MM “Acute Confusion (NANDA)”) OR (MM “Cognition Disorders”) OR (MM “Intraoperative Complications”) OR (MM “Intraoperative Care”) OR confus* OR delir* OR organic mental disorder* OR cognitive defect* OR cognitive disorder* OR cognitive deficit* OR “cognitive dysfunction” OR cognitive impairment* OR organic brain syndrome* OR organic brain disease* OR disorientation OR organic brain disorder* OR intraoperative complication* OR intraoperative care OR intra-operative complication* OR intra-operative care OR perioperative complication* OR peri-operative complication*
S3	(MM “Orthopedics”) OR orthopedic* OR orthopaedic* OR (MM “Orthopedic Surgery”) OR (MM “Hip Surgery”) OR (MM “Surgery, Operative”) OR surgi* OR operative procedure* OR “surgery” OR “surgeries” OR “intraoperative monitoring” OR “intraoperative period” OR “intraoperative care”
S4	S1 AND S2 AND S3