Fig. 1From: Intravenous patient-controlled analgesia plus psychoeducational intervention for acute postoperative pain in patients with pulmonary nodules after thoracoscopic surgery: a retrospective cohort studyNRS pain scores during the first 3 PODs in both groups. *P < .001, vs. CG group at indicated time points after surgery. NRS, numeric rating scale; POD, postoperative day; PG, psychoeducational intervention group; CG, control groupBack to article page