Hematologic changes predict clinical outcome in recovered patients with COVID-19

Area of Science:

• Hematology
• Infectious Diseases
• Internal Medicine

Background:

• 2019 coronavirus disease (COVID-19) is a global pandemic, increasingly recognized as a systemic illness beyond pneumonia.
• Hematologic abnormalities are frequently observed in COVID-19 patients, but their specific impact on recovery requires further investigation.

Purpose of the Study:

• To investigate the clinical and laboratory hematologic features of recovered COVID-19 patients without pre-existing hematologic diseases.
• To identify hematologic parameters that predict delayed hospital recovery in this population.

Main Methods:

• Retrospective analysis of 127 recovered COVID-19 patients (59 male, 68 female, median age 64) at Wuhan No. 1 Hospital.
• Evaluation of common hematologic findings including eosinopenia, monocytosis, lymphocytopenia, and anemia.
• Multivariate analysis to identify independent predictors of delayed recovery, focusing on eosinophil and basophil changes.

Main Results:

• Common hematologic findings included eosinopenia (37.80%), monocytosis (51.97%), lymphocytopenia (25.20%), and anemia (51.97%), particularly in severe cases.
• Changes in leukocytes, neutrophils, lymphocytes, monocytes, eosinophils, basophils, platelets, hemoglobin, MCV, and MCHC correlated with disease severity and lung involvement.
• Eosinophil changes (end hospitalization-baseline) and basophil changes (Max-Min) were independent predictors of delayed hospital recovery (P=0.03 for both).

Conclusions:

• Hematologic alterations are significantly associated with COVID-19 severity and clinical outcomes.
• Specific changes in eosinophils and basophils may serve as independent predictors for prolonged hospital recovery in COVID-19 survivors.
• Further research is warranted to elucidate the underlying mechanisms of these hematologic changes in COVID-19 recovery.