Fig. 2
From: Risk factors for postoperative recurrence of ovarian endometriosis: long-term follow-up of 358 women
a The ROC analysis of duration of dysmenorrhea in recurrent endometrioma patients. Area under curve: 0.689, Cut-off value: 5.5 months; b Kaplan-Meier curves presenting the cumulative rate of recurrence according to duration of dysmenorrhea (< 6 months or ≥ 6 months). There were significant differences between the two groups according to the log-rank test analysis (χ2 = 22.352, p < 0.001)