Mortality and critical conditions in COVID-19 patients at private hospitals: weekend effect?

González-Gancedo, J; Morales-Cané, I; Rodríguez-Muñoz, P M; Hidalgo-Lopezosa, P; Del Rocío Valverde-León, M; Fernández-Martínez, M E; Fabbian, F; Rodríguez-Borrego, M A; López-Soto, P J

OBJECTIVE The aim of the study was to find factors associated with the mortality of admission to the intensive care unit (ICU) in patients with COVID-19. MATERIALS AND METHODS Retrospective observational study with a database of 1987 patients with COVID-19 who had attended the emergency department of a private hospital network between February 2020 and April 2020 were analyzed. Clinical variables and some laboratory parameters were studied. The Charlson and Elixhauser comorbidity indices were calculated. The dependent variables were mortality and admission to the ICU. A descriptive and correlational analysis was performed. Logistic regression models and Kaplan-Meier survival curves were established. RESULTS Positive correlations were observed between age, creatinine, and D-dimer levels, as well as with the scores obtained with the Charlson and Elixhauser indices. Differences in the levels of these parameters were also observed when analyzing variables such as mortality, sex or admission to the ICU. Mortality was associated with high creatinine and D-dimer levels and advanced age. Survival curves indicated longer survival in patients not admitted to the ICU, admitted to the hospital during the week, and in those with lower creatinine and D-dimer levels. CONCLUSIONS Mortality in Spanish patients with COVID-19 admitted to private hospitals was associated with high creatinine and D-dimer levels and advanced age. Longer survival was obtained on weekdays. This study provides valuable information on the management and nursing care of these patients in order to optimize resources in pandemic situations.