Efficacy of brief preoperative cognitive screening using animal fluency test and six-item screener for prediction of postoperative delirium in older patients undergoing orthopaedic surgery: A prospective observational study

The preoperative cognitive screening using animal fluency test can predict the occurrence of postoperative delirium with fair accuracy in older patients undergoing orthopaedic surgery. In contrast, the six-item screener demonstrated a weak association with postoperative delirium within our study population.