RT Journal Article T1 Clinical outcomes of hospitalised patients with COVID-19 and chronic inflammatory and autoimmune rheumatic diseases: a multicentric matched cohort study A1 Pablos Álvarez, José Luis A1 Galindo Izquierdo, María A1 Castrejón Fernández, Isabel A1 Álvaro-Gracia Álvaro, José María A1 Fernandez-Nebro, Antonio AB Objectives: The impact of inflammatory rheumatic diseases on COVID-19 severity is poorly known. Here, we compare the outcomes of a cohort of patients with rheumatic diseases with a matched control cohort to identify potential risk factors for severe illness.Methods: In this comparative cohort study, we identified hospital PCR+COVID-19 rheumatic patients with chronic inflammatory arthritis (IA) or connective tissue diseases (CTDs). Non-rheumatic controls were randomly sampled 1:1 and matched by age, sex and PCR date. The main outcome was severe COVID-19, defined as death, invasive ventilation, intensive care unit admission or serious complications. We assessed the association between the outcome and the potential prognostic variables, adjusted by COVID-19 treatment, using logistic regression.Results: The cohorts were composed of 456 rheumatic and non-rheumatic patients, in equal numbers. Mean age was 63 (IQR 53-78) years and male sex 41% in both cohorts. Rheumatic diseases were IA (60%) and CTD (40%). Most patients (74%) had been hospitalised, and the risk of severe COVID-19 was 31.6% in the rheumatic and 28.1% in the non-rheumatic cohort. Ageing, male sex and previous comorbidity (obesity, diabetes, hypertension, cardiovascular or lung disease) increased the risk in the rheumatic cohort by bivariate analysis. In logistic regression analysis, independent factors associated with severe COVID-19 were increased age (OR 4.83; 95% CI 2.78 to 8.36), male sex (1.93; CI 1.21 to 3.07) and having a CTD (OR 1.82; CI 1.00 to 3.30).Conclusion: In hospitalised patients with chronic inflammatory rheumatic diseases, having a CTD but not IA nor previous immunosuppressive therapies was associated with severe COVID-19. PB BMJ SN 0003-4967 YR 2020 FD 2020 LK https://hdl.handle.net/20.500.14352/114225 UL https://hdl.handle.net/20.500.14352/114225 LA eng NO Pablos JL, Galindo M, Carmona L, Lledó A, Retuerto M, Blanco R, Gonzalez-Gay MA, Martinez-Lopez D, Castrejón I, Alvaro-Gracia JM, Fernández Fernández D, Mera-Varela A, Manrique-Arija S, Mena Vázquez N, Fernandez-Nebro A; RIER Investigators Group; RIER investigators group. Clinical outcomes of hospitalised patients with COVID-19 and chronic inflammatory and autoimmune rheumatic diseases: a multicentric matched cohort study. Ann Rheum Dis. 2020 Dec;79(12):1544-1549. NO The RIER network was supported by the Fondo de Investigación Sanitaria, Instituto de Salud Carlos III (RD16/0012 RETICS program) and cofinanced by the European Regional Development Fund (FEDER). DS Docta Complutense RD 18 abr 2025