Alba Cachero, Rocío González-Grande, Constantino Fondevila, Fernando García-Pajares, José Luis Montero, Laura Lladó, F. Nogueras, J.M. Álamo, Inmaculada Fernández, Sonia Pascual, Alejandra Otero, Jordi Colmenero, Magdalena Salcedo, Ana Arias-Milla, Emilio Fábrega, Javier Nuño, Manuel Rodríguez-Perálvarez, Gloria de la Rosa, Miquel Navasa, M.L. González-Diéguez, Carmen Vinaixa, Loreto Hierro, Lluís Castells, Santiago Tomé, Carmelo Loinaz, Mikel Gastaca, Aranzazu Caballero, Javier Graus, Javier Bustamante-Schneider, Mercedes Iñarrairaegui, Gerardo Blanco-Fernández, Pablo Ramírez, Alejandro Muñoz-Serrano, José Antonio Pons, and Ainhoa Fernández-Yunquera
Background & Aims The incidence and outcomes of coronavirus disease 2019 (Covid-19) in immunocompromised patients are a matter of debate. Methods Prospective nationwide study including a consecutive cohort of liver transplant patients with Covid-19 recruited during the Spanish outbreak from February 28th to April 7th, 2020. The primary outcome was severe Covid-19, defined as the need for mechanical ventilation, intensive care, and/or death. Age- and gender-standardized incidence and mortality ratios (SIR and SMR) were calculated using data from the Ministry of Health and the Spanish liver transplant registry. Independent predictors of severe Covid-19 among hospitalized patients were analyzed using multivariate Cox regression. Results A total of 111 liver transplant patients were diagnosed with Covid-19 (SIR=191.2 [95%CI 190.3-192.2]). The epidemiological curve and geographic distribution overlapped widely between liver transplant and general populations. After a median follow-up of 23 days, 96 patients (86.5%) were admitted to hospital and 22 patients (19.8%) required respiratory support. Twelve patients were admitted to the ICU (10.8%). The mortality rate was 18%, being lower compared to the matched general population (SMR=95.5 [95%CI 94.2-96.8]). Thirty-five patients (31.5%) met criteria of severe Covid-19. Baseline immunosuppression containing mycophenolate was an independent predictor of severe Covid-19 (RR=3.94; 95%CI 1.59-9.74; p=0.003), particularly at doses higher than 1,000 mg/day (p=0.003). This deleterious effect was not observed with calcineurin inhibitors or everolimus and complete immunosuppression withdrawal showed no benefit. Conclusions Being chronically immunosuppressed, liver transplant patients have an increased risk of acquiring Covid-19 but their mortality rates are lower than matched general population. Upon hospital admission, mycophenolate dose reduction or withdrawal could help in preventing severe Covid-19. However, complete immunosuppression withdrawal should be discouraged., Graphical abstract, HIGHLIGHTS • The incidence of Covid-19 is increased in liver transplant patients. • Mortality rates are lower than those observed in matched general population. • Immunosuppression withdrawal may not be justified. • Mycophenolate may increase the risk of severe Covid-19 in a dose dependent-manner. • Calcineurin inhibitors and everolimus are not deleterious for Covid-19., In liver transplant patients, chronic immunosuppression increases the risk of acquiring Covid-19 but it could reduce disease severity. Complete immunosuppression withdrawal may not be justified. However, mycophenolate withdrawal or temporary conversion to calcineurin inhibitors or everolimus until disease resolution could be beneficial in hospitalized patients.