Table 1 Selected independent risk factors of delirium after cardiac surgery according to existing studies [4, 6, 7]

Major depression^a

Atrial fibrillation^a

Prolonged intubation^b

Cognitive impairment^a (MMSE score of less than 25)

Anemia^a

Valvular surgery^c

Dementia^a

Hypoalbuminemia^a

Extracorporeal circulation^c

Disturbed executive functions^a

Peripheral vascular disease^a

Hypoxia^b