Cohort selection
From January 2013 to December 2017, the First Medical Center of the PLA General Hospital diagnosed and treated 517 patients with stage IA2-IB2 of cervical cancer, and a total of 238 cases were screened to satisfy the above inclusion and exclusion criteria (Figure 1). Among them, 32 patients were included in ARH group, 61 patients were included in LRH group, 100 patients were included in RRH group, and 45 patients were included in VRH group.