POD	Postoperative Delirium
POCD	Postoperative Cognitive Dysfunction
PND	Perioperative Neurocognitive Disorders
CAM-S	Confusion Assessment Method–Severity
CERAD-NP	Consortium to Establish a Registry for Alzheimer’s Disease–Neuropsychological Battery
Nu-DESC	Nursing Delirium Screening Scale
DSM-5	Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition
CI	Cognitive Impairment / Cognitive Index (context-dependent)
MMSE	Mini-Mental State Examination
FD	Factor D
FB	Factor B
FI	Factor I
C1q, C2, C3, C4	Complement Components 1q, 2, 3, and 4
MBL	Mannose-Binding Lectin
FH	Factor H
FHR	Factor H-Related Proteins
CONFESS	Cognitive and Functional Evaluation Study in Spine Surgery
CNS	Central Nervous System