Patient characteristics
The pretreatment demographic data are summarized in Table S1. A total of 278 patients were enrolled and divided into the adenomyosis group (group A, n = 50), in which the mean patient age was 32.6 ± 3.8 years, and the non-adenomyosis group (group B, n = 228), in which the mean patient age was 32.8 ± 3.6 years. No significant differences were observed in the number of cesarean sections; duration of postmenstrual spotting before cesarean section; mean preoperative CSD length, width, and depth; and the TRM measured by TVS between the groups (p> 0.05). However, the duration of postmenstrual spotting after cesarean section in group A patients was significantly longer than that in group B patients (15.3 ± 4.1 days versus 14.0 ± 3.2 days,p < 0.05). In addition, the mean preoperative width was significantly longer and the TRM was thicker in group A patients than that in group B patients (15.0 ± 3.7 mm versus16.6 ± 4.4 mm; 2.9 ± 1.1 mm versus 2.5 ± 1.2 mm, p < 0.05).