BCHE and delirium: The RF blood transfusion and MV presented a high specificity, showing that, in theabsence of these RF, delirium has a risk of not being present in 95–98% of cases.After the identification of the accuracy of the RF pharmacological agent, each onewas analyzed separately (Proton-pump inhibitors, Analgesics, Opioid analgesics,Moderate cholinesterase inhibitor, Antipsychotics, Corticosteroids,Hypnotics/Anxiolytics, Very strong cholinesterase inhibitor, Antidepressants, andGeneral anesthetics).