Elevated interleukin (IL)-6 as a predictor of disease severity among Covid-19 patients: a prospective cohort study

accompanied to the spreading of coronavirus disease 2019 (Covid-19) in the world, identifying factors related to the severity of the disease is one of the interests of physician and medical researchers. We hypothesized that interleukin 6 serum level is associated with severe outcome. In this longitu...

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Bibliographic Details
Published in:	BMC infectious diseases Vol. 23; no. 1; p. 311
Main Authors:	Nikkhoo, Bahram, Mohammadi, Matin, Hasani, Sabah, Sigari, Naseh, Borhani, Aryan, Ramezani, Chia, Charajoo, Arian, Badri, Shaho, Rostami, Farzin, Etemadi, Mashala, Rahmani, Khaled
Format:	Journal Article
Language:	English
Published:	England BioMed Central Ltd 09-05-2023 BioMed Central BMC
Subjects:	Adult Aged Analysis Cohort analysis Coronaviruses COVID-19 Cytokine storm Data collection Death Disease transmission Female Hospital utilization Hospitalization Hospitals Humans Independent variables Infectious diseases Intensive care units Interleukin 6 Interleukins Interlukine-6 Length of stay Longitudinal studies Male Medical research Medicine, Experimental Middle Aged Modelling Mortality Multiple organ dysfunction syndrome Pathophysiology Patient Acuity Patients Pneumonia Prolongation Prospective Studies Regression Regression analysis SARSCoV-2 Serum levels Services Severe acute respiratory syndrome coronavirus 2 Severity Viral diseases Iran Kurdistan SARSCoV-2 Severity Covid-19 Interlukine-6
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Summary:	accompanied to the spreading of coronavirus disease 2019 (Covid-19) in the world, identifying factors related to the severity of the disease is one of the interests of physician and medical researchers. We hypothesized that interleukin 6 serum level is associated with severe outcome. In this longitudinal prospective cohort study we enrolled 208 confirmed COVID-19 patients who were admitted to the Tohid Hospital (Sanandaj, Iran). Patients were classified into two groups based on IL-6 value in the first day of admission, elevated (n = 107) or not elevated/normal (n = 101), and followed until the occurrence of final outcome (death or discharge from the hospital). Data were analyzed using univariate methods, Chi-squared and independent two sample T test. The relationship between the independent variables and our interesting outcomes were investigated by multiple linear and penalized logistic regression modeling. A total of 208 patients, 51% female and mean age 53.6 ± 16.3 years, including 107 elevated and 101 non-elevated IL-6 patients, were followed. No significant difference was observed between the two groups in demographic and clinical characteristics. Although not significant, logistic regression results showed that the chance of death occurrence among patients with elevated IL-6 are 3.91 times higher. According to the multiple linear regression modeling, elevated IL-6 significantly increased the duration of hospital stay (P = 0.02). Frequency of ICU admission (P = 0.04) and mean of ICU stay (P = 0.8) are also higher in elevated IL-6 group. This study revealed that elevated IL-6 is significantly related to prolongation of hospital stay in Covid-19 patients. Although not significant, the occurrence of death among patients who had increased IL-6 in the time of admission was higher than patients with normal or lower serum levels of IL-6.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1471-2334 1471-2334
DOI:	10.1186/s12879-023-08294-w