The phase 3 COMPASSION-16 trial demonstrates significant progression-free survival (PFS) and overall survival (OS) benefits with cadonilimab plus standard therapy in patients with persistent, recurrent, or metastatic cervical cancer. This analysis aims to assess efficacy outcomes in patient subgroups of COMPASSION-16. The dual primary endpoints of COMPASSION-16 are PFS, assessed by the blinded independent central review (BICR) according to RECIST version 1.1, and OS. The secondary endpoint is objective response rate. In this subgroup analysis, the PFS, OS and objective response rate are evaluated in subgroups including bevacizumab use, prior concurrent chemoradiotherapy, PD-L1 combined positive score (CPS), metastatic disease at baseline, platinum use, and age. With median follow-up of 25.6 months, hazard ratios (HRs) for PFS favour cadonilimab group in all subgroups. Moreover, the addition of cadonilimab is also associated with prolonged overall survival. This subgroup analysis confirms that improvements in progression-free and overall survival are consistent with the primary results of the COMPASSION-16 study across diverse patient profiles.