RT Journal Article T1 Safety and immediate humoral response of COVID-19 vaccines in chronic kidney disease patients: the SENCOVAC study A1 Quiroga, Borja A1 Jose Soler, Maria A1 Ortiz, Alberto A1 Martinez Vaquera, Shaira A1 Jarava Mantecon, Carlos Jesus A1 Useche, Gustavo A1 Sanchez Marquez, Maria Gabriela A1 Carnerero, Manuel A1 Jaldo Rodriguez, Maria Teresa A1 Munoz Ramos, Patricia A1 Ruiz San Millan, Juan Carlos A1 Toapanta, Nestor A1 Gracia-Iguacel, Carolina A1 Aguilar Cervera, Maria Cinta A1 Balibrea Lara, Noelia A1 Leyva, Alba A1 Rojas, Jose A1 Gansevoort, Ron T. A1 de Sequera, Patricia A1 SENCOVAC Collaborative Network, K1 antibodies K1 COVID-19 K1 humoral response K1 SARS-CoV-2 K1 vaccine K1 Messenger-rna-1273 sars-cov-2 vaccine AB Background Chronic kidney disease (CKD) patients are at high-risk for severe coronavirus disease 2019 (COVID-19). The multicentric, observational and prospective SENCOVAC study aims to describe the humoral response and safety of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccines in CKD patients. Safety and immediate humoral response results are reported here. Methods Four cohorts of patients were included: kidney transplant (KT) recipients, and haemodialysis (HD), peritoneal dialysis (PD) and non-dialysis CKD patients from 50 Spanish centres. Adverse events after vaccine doses were recorded. At baseline and on Day 28 after the last vaccine dose, anti-Spike antibodies were measured and compared between cohorts. Factors associated with development of anti-Spike antibodies were analysed. Results A total of 1746 participants were recruited: 1116 HD, 171 PD, 176 non-dialysis CKD patients and 283 KT recipients. Most patients (98%) received mRNA vaccines. At least one vaccine reaction developed after the first dose in 763 (53.5%) and after the second dose in 741 (54.5%) of patients. Anti-Spike antibodies were measured in the first 301 patients. At 28 days, 95% of patients had developed antibodies: 79% of KT, 98% of HD, 99% of PD and 100% of non-dialysis CKD patients (P PB Oxford univ press SN 0931-0509 YR 2022 FD 2022-02-08 LK https://hdl.handle.net/10668/25168 UL https://hdl.handle.net/10668/25168 LA en DS RISalud RD Apr 12, 2025