Development and validation of a postoperative delirium prediction model for patients admitted to an intensive care unit in China: a prospective study

Objectives: We aimed to develop and validate a postoperative delirium (POD) prediction model for patients admitted to the intensive care unit (ICU). Design: A prospective study was conducted. Setting: The study was conducted in the surgical, cardiovascular surgical, and trauma surgical ICUs of an affiliated hospital of a medical university in Heilongjiang Province, China. Participants: This study included 400 patients (≥18 years old) admitted to the ICU after surgery. Primary and secondary outcome measures: The primary outcome measure was postoperative delirium assessment during ICU stay. Results: The model was developed using 300 consecutive ICU patients and was validated using 100 patients from the same ICUs. The model was based on five risk factors: Physiological and Operative Severity Score for the Enumeration of Mortality and Morbidity; acid-base disturbance; and history of coma, diabetes, or hypertension. The model had an area under the receiver operating characteri...