Id |
Subject |
Object |
Predicate |
Lexical cue |
T1 |
0-72 |
Sentence |
denotes |
Interleukin-6 and severe COVID-19: a systematic review and meta-analysis |
T2 |
74-82 |
Sentence |
denotes |
Abstract |
T3 |
83-93 |
Sentence |
denotes |
Background |
T4 |
94-149 |
Sentence |
denotes |
Evidence links COVID-19 severity to hyper-inflammation. |
T5 |
150-327 |
Sentence |
denotes |
Treatment with tocilizumab, a monoclonal antibody directed against the interleukin-6 (IL-6) receptor, was shown to lead to clinical improvement in patients with severe COVID-19. |
T6 |
328-537 |
Sentence |
denotes |
We, therefore, performed the present systematic review and meta-analysis to investigate whether the circulating levels of IL-6 is a reliable indicator of disease severity among patients affected with COVID-19. |
T7 |
539-546 |
Sentence |
denotes |
Methods |
T8 |
547-653 |
Sentence |
denotes |
A systematic search was conducted in PubMed, Scopus, Web of Science, and Google Scholar on April 19, 2020. |
T9 |
655-662 |
Sentence |
denotes |
Results |
T10 |
663-818 |
Sentence |
denotes |
Eleven studies provided data of IL-6 levels in patients with severe to critical COVID-19 (severe) and patients with mild to moderate COVID-19 (non-severe). |
T11 |
819-873 |
Sentence |
denotes |
The included studies were of moderate to high quality. |
T12 |
874-1035 |
Sentence |
denotes |
The mean patients’ age was 60.9 years, ranging from 45.2 to 76.7 years in the severe group and 46.8 years, ranging from 37.9 to 61 years, in the nonsevere group. |
T13 |
1036-1128 |
Sentence |
denotes |
Fifty-two percent were male in the severe group, as compared to 46% in the non-severe group. |
T14 |
1129-1313 |
Sentence |
denotes |
An overall random effects meta-analysis showed significantly higher serum levels of IL-6 in the severe group than in the non-severe group with a mean difference of +23.1 pg/mL (95% CI: |
T15 |
1314-1376 |
Sentence |
denotes |
12.42–33.79) and the overall effect of 4.24 (P-value < 0.001). |
T16 |
1377-1498 |
Sentence |
denotes |
Meta-regressions showed that neither age nor sex significantly influenced the mean difference of IL-6 between the groups. |
T17 |
1500-1511 |
Sentence |
denotes |
Conclusions |
T18 |
1512-1640 |
Sentence |
denotes |
Meta-analysis and meta-regression reveal a reliable relationship between IL-6 and COVID-19 severity, independent of age and sex. |
T19 |
1641-1767 |
Sentence |
denotes |
Future research is, however, required to assess the effect of BMI on the pattern of IL-6 production in patients with COVID-19. |
T20 |
1768-1902 |
Sentence |
denotes |
Also, there might be confounding factors that influence the relationship between IL-6 and COVID-19 severity and remain as yet unknown. |
T21 |
1906-1937 |
Sentence |
denotes |
Acknowledgments and disclosures |
T22 |
1938-1997 |
Sentence |
denotes |
Ethics approval and consent to participate: not applicable. |
T23 |
1998-2038 |
Sentence |
denotes |
Consent for publication: not applicable. |
T24 |
2039-2090 |
Sentence |
denotes |
Availability of data and materials: not applicable. |
T25 |
2091-2173 |
Sentence |
denotes |
Conflicts of interests: the authors declare that they have no competing interests. |
T26 |
2174-2225 |
Sentence |
denotes |
Funding: there is no funding for the present study. |
T27 |
2226-2419 |
Sentence |
denotes |
Authors’ contributions: H.M. conceptualized the study, conducted database search, search results screening, detailed review, data extraction, quality assessment, and prepared the initial draft. |
T28 |
2420-2450 |
Sentence |
denotes |
A.S. prepared the final draft. |
T29 |
2451-2519 |
Sentence |
denotes |
N.R. supervised the project and critically appraised the manuscript. |
T30 |
2520-2552 |
Sentence |
denotes |
Acknowledgments: not applicable. |