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Comprehensive Laboratory Data Analysis to Predict the Clinical Severity of Coronavirus Disease 2019 in 1,952 Patients
Eun-Hyung Yoo1, Soon Hee Chang2, Do-Young Song3
1Department of Laboratory Medicine, Daegu Catholic University School of Medicine, Daegu, Korea.
Insights
Abnormal laboratory parameters in COVID-19 patients are common and linked to disease severity. Monitoring albumin and lymphocyte levels can predict severe outcomes and guide timely treatment.
Area of Science:
- Infectious Diseases
- Clinical Pathology
- Epidemiology
Background:
- Laboratory parameter abnormalities are frequently observed in patients with coronavirus disease 2019 (COVID-19).
- The clinical significance and predictive value of these abnormalities for disease severity remain under investigation.
- This study aimed to assess the prevalence, characteristics, and clinical impact of laboratory parameters in hospitalized COVID-19 patients.
Purpose of the Study:
- To investigate the association between laboratory parameters and COVID-19 clinical severity.
- To identify specific laboratory abnormalities that can predict severe disease outcomes.
- To evaluate the utility of routine laboratory tests in managing COVID-19 patients.
Main Methods:
- A retrospective analysis of 1,952 COVID-19 patients hospitalized in Daegu, Korea.
- Patients were classified into mild, moderate, and severe disease groups based on clinical severity scores.
- Statistical analyses, including chi-square tests and multinomial logistic regression, were used to correlate laboratory parameters with disease severity.
Main Results:
- Significant differences in hematologic, coagulation, biochemical, inflammatory, cardiac, and molecular virologic parameters were observed across disease severity groups.
- Relative lymphopenia, prolonged prothrombin time, and hypoalbuminemia were identified as significant indicators of COVID-19 severity.
- Patients exhibiting both hypoalbuminemia and lymphopenia demonstrated an elevated risk of developing severe COVID-19.
Conclusions:
- Laboratory parameter abnormalities on admission are prevalent in COVID-19 patients and significantly correlate with clinical severity.
- Specific parameters, such as albumin and lymphocyte counts, serve as independent predictors of COVID-19 severity.
- Monitoring these laboratory findings is crucial for timely diagnosis and effective management of COVID-19.
Background:
Laboratory parameter abnormalities are commonly observed in COVID-19 patients; however, their clinical significance remains controversial. We assessed the prevalence, characteristics, and clinical impact of laboratory parameters in COVID-19 patients hospitalized in Daegu, Korea.
Methods:
We investigated the clinical and laboratory parameters of 1,952 COVID-19 patients on admission in nine hospitals in Daegu, Korea. The average patient age was 58.1 years, and 700 (35.9%) patients were men. The patients were classified into mild (N=1,612), moderate (N=294), and severe (N=46) disease groups based on clinical severity scores. We used chi-square test, multiple comparison analysis, and multinomial logistic regression to evaluate the correlation between laboratory parameters and disease severity.
Results:
Laboratory parameters on admission in the three disease groups were significantly different in terms of hematologic (Hb, Hct, white blood cell count, lymphocyte%, and platelet count), coagulation (prothrombin time and activated partial thromboplastin time), biochemical (albumin, aspartate aminotransferase, alanine aminotransferase, lactate, blood urea nitrogen, creatinine, and electrolytes), inflammatory (C-reactive protein and procalcitonin), cardiac (creatinine kinase MB isoenzyme and troponin I), and molecular virologic (Ct value of SARS-CoV-2 RdRP gene) parameters. Relative lymphopenia, prothrombin time prolongation, and hypoalbuminemia were significant indicators of COVID-19 severity. Patients with both hypoalbuminemia and lymphopenia had a higher risk of severe COVID-19.
Conclusions:
Laboratory parameter abnormalities on admission are common, are significantly associated with clinical severity, and can serve as independent predictors of COVID-19 severity. Monitoring the laboratory parameters, including albumin and lymphocyte count, is crucial for timely treatment of COVID-19.
