1. Admission SpO2 and ROX index predict outcome in patients with COVID-19;Mukhtar;Am J Emerg Med,2021
2. The ROX index has greater predictive validity than NEWS2 for deterioration in Covid-19;Prower,2021
3. Tang M, Yu XX, Huang J, Gao JL, Cen FL, Xiao Q, et al. Clinical diagnosis of severe COVID-19: a derivation and validation of a prediction rule. World J Clin Cases. 9(13):14.
4. Correlation of dyspnea with age and SPO2 levels in covid-19 and effectiveness of neurophysiological facilitation in the management of dyspnea-a randomized clinical control trail;Kuma,2020
5. Clinical characteristics on admission predict in-hospital fatal outcome in patients aged ≥75 years with novel coronavirus disease (COVID-19): a retrospective cohort study;Yu,2020