Nonlinear association between admission oxygen partial pressure and in-hospital and one-year all-cause mortality in patients with coronavirus disease pneumonia: A retrospective cohort study.

Background: This study investigated the correlation between admission partial pressure of arterial oxygen (PaO) levels and both in-hospital mortality and 1-year all-cause mortality among patients diagnosed with coronavirus disease (COVID-19) pneumonia.

Methods: This retrospective cohort study included patients with COVID-19 pneumonia admitted to the First Hospital of Jinzhou Medical University. Restricted cubic spline regression and logistic regression analyses were employed to assess the relation between PaO levels and the risk of in-hospital mortality and all-cause mortality within 1 year.

Association between admission heart rate and in-hospital mortality in patients with acute exacerbation of chronic obstructive pulmonary disease and respiratory failure: a retrospective cohort study.

Background: Acute exacerbation of chronic obstructive pulmonary disease (AECOPD) combined with respiratory failure (RF) is a chronic respiratory disease that seriously endangers human health. This study aimed to specifically evaluate the relationship between admission heart rate (AHR) and in-hospital mortality in patients with combined AECOPD and RF to better inform clinical treatment.

Methods: This retrospective cohort study included 397 patients admitted to a Chinese hospital between January 2021 and March 2023.