A commentary on “Risk factors for postoperative delirium: An umbrella review of systematic reviews” (Int J Surg 2021 Aug; 93: 106063)

Dear Editor Postoperative delirium (POD) is a serious complication which is often under-recognized and it can lead to increase in length of hospital stay and poor outcomes [1]. Occurrence of POD is characterized by fluctuating changes of cognitive capacity, altered perception with hallucination, acute decline in cognition and inappropriate behavior. Early identification of patients at risk of developing delirium is important because adequate and...