Randomization
RECRUITMENT
Before patient recruitment, an anaesthesiologist who was not involved in this study prepared a random allocation sequence with a one-to-one ratio using a computer-generated randomized table. Patients were allocated to two groups: the general anaesthesia (GA) group and the spinal anaesthesia (SA) group. The clinical research coordinator who was blinded to this study managed the randomization table and notified the attending anaesthesiologist of the group allocation on the day of surgery.