Role of Lymphocyte Subsets and Laboratory Measurements in COVID-19 Disease

Study Overview
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Brief Summary
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To investigate the predictive role of lymphocyte subsets and other laboratory measurements in adult patients with COVID-19.This was a single center, retrospective study that involved adult patients with confirmed diagnosis of COVID-19. Electronic medical records were reviewed. Data including age, sex, symptom from onset to hospital admission and laboratory findings at admission of hospitalized patients with confirmed COVID-19 were extracted and analyzed retrospectively.This study indicates that the levels of lymphocyte subsets (CD4+, and CD8+) are associated with disease progression and severity, along with prognosis in patients with COVID-19.

Detailed Description
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This was a single center, retrospective study that involved adult patients with confirmed diagnosis of COVID-19. Electronic medical records were reviewed. Data including age, sex, symptom from onset to hospital admission and laboratory findings at admission of hospitalized patients with confirmed COVID-19 were extracted and analyzed retrospectively. Identifying the possible immune factors and laboratory parameters is requisite for the early identification of patients with severe COVID-19 and timely intervention for control of the disease. There is an unmet need to establish robust clinical cutoffs of lymphocyte subsets for predicting risk associated with ICU admission, mechanical ventilation, and mortality in COVID-19 patients. This retrospective study was thus carried out to improve knowledge and clinical utility of lymphocyte subset measurements, together with other laboratory measurements and clinical information, for understanding prognosis in COVID-19 patients. These findings suggest that alterations in lymphocyte subsets and laboratory measurements play a significant role in the progression of COVID-19.

Official Title
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The Predictive Role of Lymphocyte Subsets and Laboratory Measurements in COVID-19 Disease- A Retrospective Study

Conditions
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COVID-19 Disease

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Confirmed diagnosis of COVID-19 disease. Exclusion Criteria: The patients were excluded patients <18 years age and without confirmed diagnosis of disease.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Correlation of CD4+ and CD8+ T cell absolute counts to disease outcomes | The study endpoints were to demonstrate whether CD4+ and CD8+ T cell absolute counts are prognostic marker in determining disease outcomes (including ICU admission and/or mechanical ventilation and/or mortality); to explore whether lymphocyte subset measurements recover at hospital discharge or in convalescence; lymphocyte subset measurements between severe and non-severe groups, at admission. In addition, association between CD4+ and CD8+ T cell absolute counts with cytokine levels and other laboratory parameters (neutrophil counts, total lymphocyte counts, platelet counts, C-reactive protein levels) were also assessed. | 2021.02-2021.08 |