Comparison of Changes in Inflammation Markers NLR, CRP, and LCR after Corticosteroid Therapy in Severe and Critical COVID-19 Patients

Abstract

Corticosteroid, an immunomodulator agent for treating hyperinflammation, is widely used in severe and critical COVID-19 patients. This study is a retrospective observational cohort clinical study comparing changes in NLR, CRP, and LCR values with and without corticosteroid therapy in critically ill COVID-19 patients. Those samples were chosen due to widespread access and economically sound to be examined repetitively. Samples were collected by total sampling of medical records of patients admitted to the COVID-19 intensive care unit at RSUD Dr Soetomo between March 2020 to July 2021. Inclusion criteria are complete medical records of patients > 18 years with a confirmed COVID-19 diagnosis with severe and/or acute symptoms according to the WHO criteria and receiving corticosteroids (dexamethasone 6 mg/24 h or equivalent dose) for a minimum of 3 days. Patients not receiving corticosteroid treatment were included in the control group. NLR, CRP, and LCR were evaluated on day-0, day-3, day-6, and day-10 after initiation of corticosteroid therapy; in the control group, their hospital admission was designated as day-0. Comorbidities, complications, and other therapies that may affect NLR, CRP, and LCR values are noted. A total of 460 patients were included in the inclusion criteria. The control group had no significant median NLR, CRP, and LCR changes during observation (p-value > 0.05). In the therapy group, there was a significant increase in NLR and LCR and a decrease in CRP (p-value < 0.0001). When compared between control and therapy groups, the median changes in NLR and CRP differed significantly (p-value < 0.05), while significant differences in LCR occurred on days 6 and 10. Corticosteroid increases NLR and LCR and decreases CRP with significant differences between groups. HIGHLIGHTS Corticosteroid treatment significantly increases NLR and LCR levels, while CRP levels decrease significantly in severe and critical COVID-19 patients NLR measurements are unsuitable as indicators of post-therapy inflammatory status during the ongoing immunopathological process of COVID-19 or due to a period of neutrophilia caused by the steroid itself LCR measurement can detect alterations in inflammatory status up to the tenth day following corticosteroid treatment in patients with severe COVID-19 CRP measurements remain a reliable indicators of inflammatory status changes for up to 10 days following corticosteroid therapy in severe and critical COVID-19 patients GRAPHICAL ABSTRACT