Methods We used data from more than 800 US hospitals in the Premier Healthcare
Database Special COVID-19 Release (PHD-SR) to describe hospitalized patients aged 18 …

Objectives Existing findings regarding the relationship between comorbidities and the
severity of coronavirus disease 2019 (COVID-19) are inconsistent and insufficient. The aim …

The global pandemic of novel coronavirus disease 2019 (COVID-19) has become an
emergency of major international concern. We aim to assess the prevalence of clinical …

Introduction: Given the ongoing coronavirus disease 2019 (COVID-19) pandemic and the
consequent global healthcare crisis, there is an urgent need to better understand risk factors …

Introduction Progression of COVID-19 to severe disease and death is insufficiently
understood. Objective Summarize the prevalence of risk factors and adverse outcomes and …

Introduction Underlying disease have a critical role in vulnerability of populations for a
greater morbidity and mortality when they suffer from COVID-19. The aim of current study is …

ABSTRACT SARS-CoV-2 has caused a worldwide pandemic that began with an outbreak of
pneumonia cases in the Hubei province of China. Knowledge of those most at risk is integral …

This meta‐analysis aims to screen the risk factors for severe illness and death and provide
help for early clinical treatment of the new coronavirus (COVID‐19). Based on a …

Abstract Background An epidemic of Coronavirus Disease 2019 (COVID-19) began in
December 2019 and triggered a Public Health Emergency of International Concern (PHEIC) …

Aim COVID-19 clinical presentation is heterogeneous, ranging from asymptomatic to severe
cases. While there are a number of early publications relating to risk factors for COVID-19 …