Demographic characteristics: | Age (years) |
Sex (male/female) | |
American Society of Anaesthesiologist (ASA) physical status score | |
Height (cm) | |
Weight (kg) | |
Body mass index (BMI; kg/m2) | |
Prior use of analgesic medication | |
• Use of paracetamol: no use, daily use, or ‘as needed’ | |
• Use of ibuprofen: no use, daily use, or ‘as needed’ | |
• Use of tramadol: no use, daily use, or ‘as needed’ | |
• Use of codeine: no use, daily use, or ‘as needed’ | |
• Use of other non-steroidal anti-inflammatory drugs: no use, daily use, or ‘as needed’ | |
Surgical characteristics: | Duration of surgery (min) |
Type of surgery | |
• Uncemented, cemented, or hybrid total hip arthroplasty | |
Type of anaesthesia | |
• General anaesthesia, spinal anaesthesia, conversion of spinal anaesthesia to general anaesthesia, or spinal anaesthesia with sedation ○ If general anaesthesia: amount of sufentanil (μg) given 15 min before ‘end of surgery’ ○ If spinal anaesthesia: amount of bupivacaine (mg) used |