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PATIENTS AND METHODS : We performed a double - blind , randomized controlled trial at an academic medical center of elderly patients ( > or = 65 years ) without preoperative delirium or severe dementia who underwent hip fracture repair under spinal anesthesia with propofol sedation .
 Disease: delirium; Disease: dementia; Disease: hip fracture; Chemical: propofol
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Disease: delirium; Disease: dementia; Disease: hip fracture; Chemical: propofol