Optimization of the cardiac delirium index by including age, decrease in butyrylcholinesterase actitivity, preoperative HbA1c, and postoperative hemoglobin levels: results of a secondary analysis of a prospective observational study. - Zajonz TS; Edinger F; Markmann M; Gräb K; Sander M; Kunzemann C; Koch C; Schneck E (Frontiers in cardiovascular medicine, 2024)