ASA score	American Society of Anesthesiologists system for assessing the fitness of patients before surgery
BSI	bloodstream infection
CI	confidence interval
CRAN	craniotomy
ECDC	European Centre for Disease Prevention and Control
FUSN	spinal implant surgery
HAIs	healthcare-associated infections
ICT	Infection Control Team
LAM	laminectomy
OR	odds ratio
PN	pneumonia
SSIs	surgical site infections
VAP	ventilator-associated pneumonia
VP shunt	ventricular shunt implantation surgery