Fig. 2From: Deep and superficial endometriotic disease: the response to radical laparoscopic excision in the treatment of chronic pelvic painAltman–Bland plot of difference (B−A) vs average of pre-operative and post-operative global pain scores (B+A)/2. Average change and ±95% limits of agreement are shown by dashed lines. The numbers identify each subject’s reference number. Symbols indicate r-ASMR classification: ○ class 0, □ class 1, ● class 2, ■ class 3, * class 4Back to article page