We read with great interest, “Postoperative Delirium after Dexmedetomidine versus Propofol Sedation in Healthy Older Adults Undergoing Orthopedic Lower Limb Surgery with Spinal Anesthesia: A Randomized Controlled Trial” by Shin et al.  It reported that the incidence of delirium was less in the group receiving propofol versus dexmedetomidine. The article notes that certain postoperative medications, such as opioids and benzodiazepines, can affect postoperative delirium rates. However, the article did not describe the use of these drugs in the two patient groups. It would be helpful to know this information, and the statistical analysis being used in the two groups, to better understand the results of the study.