Related Experiment Video
Updated: Oct 4, 2025

Halogenated Agent Delivery in Porcine Model of Acute Respiratory Distress Syndrome via an Intensive Care Unit Type Device
Published on: September 24, 2020
Clinical features and risk factors of severely and critically ill patients with COVID-19
Xin Chu1, Gui-Fang Zhang2, Yong-Ke Zheng3
1Department of Surgical Intensive Care Medicine, Beijing Hospital, National Center of Gerontology; Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100730, China.
Insights
Identifying severe COVID-19 cases early is crucial. Advanced age, elevated neutrophil-to-lymphocyte ratios, and high-sensitivity cardiac troponin I are key indicators for predicting severe coronavirus disease 2019 (COVID-19) progression.
Area of Science:
- Infectious Diseases
- Critical Care Medicine
- Biomarkers
Background:
- Over 370,000 global deaths reported by June 1, 2020.
- Risk factors for severe coronavirus disease 2019 (COVID-19) remain unclear.
Purpose of the Study:
- To identify characteristics of severely and critically ill COVID-19 patients.
- To find predictive markers for severe COVID-19 progression.
Main Methods:
- Retrospective study of 126 COVID-19 patients (moderate, severe, critical groups).
- Data collected: demographics, clinical symptoms, outcomes, lab tests, and imaging.
- Multivariate logistic regression analysis performed.
Main Results:
- Age (OR=1.055), elevated neutrophil-to-lymphocyte ratio (OR=4.019), and elevated high-sensitivity cardiac troponin I (OR=10.126) identified as high-risk factors.
- Significant differences in outcomes and laboratory values observed between patient groups.
Conclusions:
- Age, elevated neutrophil-to-lymphocyte ratio, and high-sensitivity cardiac troponin I can help identify severe COVID-19 patients early.
- These markers aid clinicians in risk stratification and timely intervention.
Background:
As of June 1, 2020, over 370000 coronavirus disease 2019 (COVID-19) deaths have been reported to the World Health Organization. However, the risk factors for patients with moderate-to-severe or severe-to-critical COVID-19 remain unclear.
Aim:
To explore the characteristics and predictive markers of severely and critically ill patients with COVID-19.
Methods:
A retrospective study was conducted at the B11 Zhongfaxincheng campus and E1-3 Guanggu campus of Tongji Hospital affiliated with Huazhong University of Science and Technology in Wuhan. Patients with COVID-19 admitted from 1st February 2020 to 8th March 2020 were enrolled and categorized into 3 groups: The moderate group, severe group and critically ill group. Epidemiological data, demographic data, clinical symptoms and outcomes, complications, laboratory tests and radiographic examinations were collected retrospectively from the hospital information system and then compared between groups.
Results:
A total of 126 patients were enrolled. There were 59 in the moderate group, 49 in the severe group, and 18 in the critically ill group. Multivariate logistic regression analysis showed that age [odd ratio (OR) = 1.055, 95% (confidence interval) CI: 1.099-1.104], elevated neutrophil-to-lymphocyte ratios (OR = 4.019, 95%CI: 1.045-15.467) and elevated high-sensitivity cardiac troponin I (OR = 10.126, 95%CI: 1.088 -94.247) were high-risk factors.
Conclusion:
The following indicators can help clinicians identify patients with severe COVID-19 at an early stage: age, an elevated neutrophil-to-lymphocyte ratio and high sensitivity cardiac troponin I.
Related Concept Videos
COPD: Pathogenesis and Clinical Features
The primary cause for the onset of COPD is cigarette smoking and exposure to air pollution. These hazardous factors initiate a chain reaction within the lungs, resulting in chronic inflammation, damage to the airways, and a...
Acute Respiratory Failure-III
Acute Respiratory Failure-IV
Pneumonia I: Introduction
Risk Factors
Various factors influence the likelihood of developing pneumonia. Age plays a crucial role, with infants, children under two, and individuals over 65 at increased risk due to their...
Pneumonia III: Complications and Assessment
Chronic Obstructive Pulmonary Disease-III: Symptoms and Complications.
Symptoms of COPD can be classified as primary or systemic. Primary symptoms relate to reduced airflow, while systemic or extrapulmonary symptoms relate to COPD's broader impact on the body.
Primary Symptoms of COPD:

