RT Journal Article T1 Oral saliva swab reverse transcription PCR for Covid-19 in the paediatric population. A1 Moraleda, Cinta A1 Domínguez-Rodríguez, Sara A1 Mesa, Juan Miguel A1 García-Sánchez, Paula A1 de la Serna, María A1 Alonso-Cadenas, José Antonio A1 Bermejo, Amanda A1 Sabrido, Gema A1 Martínez-Campos, Leticia A1 González-Posada, Aránzazu Flavia A1 Illán-Ramos, Marta A1 Cobos-Carrascosa, Elena A1 Ballesteros, Álvaro A1 Galán, Juan Carlos A1 Llorente, Francisco A1 Aguilera-Alonso, David A1 Jiménez, Ana Belén A1 Catalán, Pilar A1 Dahdouh, Elias A1 Navarro, Ignacio A1 Fernández-Garoz, Bárbara A1 Mendoza, Pablo A1 Pérez-Jorge, Concepción A1 Cabezas-Fernández, Teresa A1 Blázquez-Gamero, Daniel A1 Rivas, Gonzalo A1 Gonzalez-Donapetry, Patricia A1 Sáez, Elena A1 Fernández-Pinero, Jovita A1 Lucas-Fernández, Jesús A1 Pérez-Ramírez, Elisa A1 Merino, Paloma A1 Miragaya, Sandra A1 Lorente, Jorge A1 Iglesias, Irene A1 Tagarro, Alfredo A1 EPICO working group, K1 Covid-19 K1 Infectious Disease Medicine K1 Microbiology K1 Molecular Biology K1 Virology AB To evaluate the performance of oral saliva swab (OSS) reverse transcription PCR (RT-PCR) compared with RT-PCR and antigen rapid diagnostic test (Ag-RDT) on nasopharyngeal swabs (NPS) for SARS-CoV-2 in children. Cross-sectional multicentre diagnostic study. Study nested in a prospective, observational cohort (EPICO-AEP) performed between February and March 2021 including 10 hospitals in Spain. Children from 0 to 18 years with symptoms compatible with Covid-19 of ≤5 days of duration were included. Two NPS samples (Ag-RDT and RT-PCR) and one OSS sample for RT-PCR were collected. Performance of Ag-RDT and RT-PCR on NPS and RT-PCR on OSS sample for SARS-CoV-2. 1174 children were included, aged 3.8 years (IQR 1.7-9.0); 73/1174 (6.2%) patients tested positive by at least one of the techniques. Sensitivity and specificity of OSS RT-PCR were 72.1% (95% CI 59.7 to 81.9) and 99.6% (95% CI 99 to 99.9), respectively, versus 61.8% (95% CI 49.1 to 73) and 99.9% (95% CI 99.4 to 100) for the Ag-RDT. Kappa index was 0.79 (95% CI 0.72 to 0.88) for OSS RT-PCR and 0.74 (95% CI 0.65 to 0.84) for Ag-RDT versus NPS RT-PCR. RT-PCR on the OSS sample is an accurate option for SARS-CoV-2 testing in children. A less intrusive technique for younger patients, who usually are tested frequently, might increase the number of patients tested. YR 2022 FD 2022-06-10 LK http://hdl.handle.net/10668/20131 UL http://hdl.handle.net/10668/20131 LA en DS RISalud RD Apr 9, 2025