INTRODUCTION
The SARS-CoV-2 infection, which began in December 2019 has now become a global pandemic of unpredictable consequences constituting a threat to public health, as well as causing thousands of deaths daily throughout the world.
Many aspects of COVID-19 remain unknown, given the changing nature of the infection and the similarities and differences between the characteristics of the different waves and this has necessitated frequent re-appraisal of care planning. Consequently, in order to provide crucial perspectives for care services and develop appropriate health policies, numerous predictive models have been developed2 which are regularly being updated.
Currently, the prospect is that COVID-19 will not disappear in the short or medium term, despite the vaccination process implemented during 2021-2022. Moreover, constant study is required of the characteristics of the disease and the factors related to an adverse evolution, in order to enable rapid modification of treatments and reorganization of the health system if necessary.
In this paper, we seek to identify factors related to hospitalization, adverse evolution —defined as admission to an ICU or death— and mortality related to the infection and evaluate their performance in the latest variant of SARS-CoV-2, Omicron.