Fig. 1

Pain after block placement or corresponding time in control group. Forest plot of pain reduction after preoperative ultrasound guided peripheral nerve blocks compared to systemic analgesia in hip fracture patients. Mean and SD are presented at 10 cm visual analogue scale (VAS). US-PNB, ultrasound-guided peripheral nerve block.*due to the two intervention groups, the number of participants in the control group has been split in two equal groups in order to perform subgroup analysis of femoral nerve block and fascia iliaca compartment block.