RT Journal Article T1 Shorter Time to Discontinuation Due to Treatment Failure in People Living with HIV Switched to Dolutegravir Plus Either Rilpivirine or Lamivudine Compared with Integrase Inhibitor-Based Triple Therapy in a Large Spanish Cohort. A1 Teira, Ramón A1 Diaz-Cuervo, Helena A1 Aragão, Filipa A1 Castaño, Manuel A1 Romero, Alberto A1 Roca, Bernardino A1 Montero, Marta A1 Galindo, Maria José A1 Muñoz-Sánchez, Maria Jose A1 Espinosa, Nuria A1 Peraire, Joaquim A1 Martínez, Elisa A1 de la Fuente, Belén A1 Domingo, Pere A1 Deig, Elisabeth A1 Merino, María Dolores A1 Geijo, Paloma A1 Estrada, Vicente A1 Sepúlveda, María Antonia A1 García, Josefina A1 Berenguer, Juan A1 Currán, Adriá K1 Adverse events K1 Effectiveness K1 HIV K1 Time to discontinuation K1 Triple therapy K1 Two-drug combinations K1 Virologic failure AB Standard therapy for HIV treatment has consisted of two nucleoside analogue reverse transcriptase inhibitors (NRTI) paired with a third agent. Use of two-drug regimens (2DR) has been considered for selected patients in part to avoid toxicities associated with the use of NRTIs. This study aimed to compare the real-world outcomes of integrase inhibitor (INSTI)-based three-drug regimens (3DR) versus 2DR of dolutegravir (DTG) + rilpivirine (RPV) or DTG + lamivudine (3TC). All patients in the Spanish VACH cohort switching to INSTI-based 3DR or a 2DR consisting of DTG + RPV or DTG + 3TC between May 2, 2016 and May 15, 2019 were included. Kaplan-Meier curves and Cox proportional hazard models were used to assess time to/risk of discontinuation due to treatment failure (TF) (defined as virologic failure [VF], immunologic failure, or disease progression) and adverse events (AEs). Three secondary analyses were performed: (1) in restricting the analysis to patients who were virologically suppressed (HIV RNA  Overall, 5047 3DR and 617 2DR patients were analyzed. Baseline characteristics differed between groups; 2DR patients were older, more treatment experienced, and more likely to be virologically suppressed at switch. Time to discontinuation due to TF was significantly shorter for 2DR (P = 0.002). The hazard ratio (HR) for discontinuation due to TF on 2DR vs 3DR was 2.33 (P = 0.003). No difference was observed for time to discontinuation (P = 0.908) or risk of discontinuation due to AEs (HR = 0.80; P = 0.488). Results were qualitatively similar in virologically suppressed patients, matched analysis, and for VF. In the real world, the risks of discontinuation due to TF and VF were more than two times higher in patients switching to DTG-based 2DR than INSTI-based 3DR, with no difference in discontinuation due to AEs. SN 2193-8229 YR 2022 FD 2022-04-11 LK http://hdl.handle.net/10668/21552 UL http://hdl.handle.net/10668/21552 LA en DS RISalud RD Apr 7, 2025