Fig. 5From: Ultrasound-guided ilioinguinal-iliohypogastric block (ILIHB) or perifocal wound infiltration (PWI) in children: a prospective randomized comparison of analgesia quality, a pilot studyTotal relative pain frequency as a function of a the group (for all episodes), p = 0.01 b the measurement episode (for all subjects), p = < 0.001Back to article page