Maintenance dienogest therapy following adjuvant gonadotropin‐releasing hormone agonist treatment after uterus‐sparing surgery in adenomyosis: A retrospective cohort study

Objective To investigate the safety and efficacy of adjuvant gonadotropin‐releasing hormone agonist (GnRH‐a) treatment followed by maintenance dienogest (DNG) therapy after uterus‐sparing surgery. Methods Retrospective cohort study. A total of 190 patients with severe adenomyosis underwent uterus‐sparing surgery between January 2010 and June 2020. Of these patients, 90 were analyzed. Forty‐six patients (control group) received adjuvant 6‐month GnRH‐a therapy alone after uterus‐sparing surgery, and 44 patients (maintenance group) received postoperative 6‐month GnRH‐a treatment followed by maintenance DNG therapy (2 mg/day orally). The median follow‐up period was 18 months. The study was analyzed using generalized estimating equations. Results At baseline, the characteristics of patients in each group were comparable. Compared with the control group, the maintenance group had a significant improvement in the visual analog scale score of dysmenorrhea (P