1. Patient characteristics
The characteristics of the patients are summarized in Table 1. The median age of the study patients was 33 years (range: 22 to 44 years). The median duration of menstruation before and after C-sections were 6.13±1.10 and 13.37±3.64 days, respectively. The median TRM measured via MRI before VR was 2.73 ± 1.82 mm. The measurement data, namely, length, width, and depth of the CSD via MRI, were 8.96±3.95 mm, 14.33±8.12 mm, and 6.40±2.96 mm, respectively (eTable 1 in the Supplement). Of these women, 33.19% (312/940) achieved optimal healing(TRM≥5.39mm and durations of menstruation ≤7 days).
2. Association between optimal healing and the clinical characteristics of the patients or the measurement data of CSD by univariate analysis.
The thickness of the muscular layer of the lower segment of the uterus in the optimal healing group was significantly lower than that in the suboptimal healing(TRM<5.39mm or durations of menstruation >7 days) group (20.63±25.23 vs. 32.15±28.27, p < 0.05). The width of the CSD via MRI of the optimal group was 13.39±7.98 mm, which was significantly lower than that of the suboptimal healing group (14.80±8.15 mm) (eTable 2 in the Supplement).