Hypertension, mitral valve disease, atrial fibrillation and low education level predict delirium and worst outcome after cardiac surgery in older adults - Oliveira, Fatima R.; Oliveira, Victor H.; Oliveira, Italo M.; Lima, Jose W.; Calderaro, Daniela; Gualandro, Danielle M; Caramelli, Bruno (Bmc anesthesiology, 2018)