Observational studyPeerJ2025
Comparative effectiveness of anti-inflammatory and antiviral therapies on NLR and survival outcomes in severe COVID-19: multicenter retrospective study.
Observational study in PeerJ, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
1 citing paper in PubMed.
- Myocardial Injury and Predictors of In-Hospital Mortality in Severe or Critical COVID-19: A Single-Center Observational Cohort Study.Medicina (Kaunas, Lithuania) · 2026Observational
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
11 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background: The COVID-19 pandemic has highlighted the critical role of immune dysregulation and systemic inflammation in disease severity, particularly in patients with severe respiratory illness. Elevated levels of pro-inflammatory cytokines, such as IL-6, and biomarkers like the neutrophil-to-lymphocyte ratio (NLR) have been associated with worse outcomes. This study enrolled laboratory-confirmed SARS-CoV-2 patients with acute respiratory illness requiring intestive care unit (ICU) admission, including mechanical ventilation, to evaluate the effect of different treatments on NLR, neutrophil count (NC), and lymphocyte count (LC). Methods: A retrospective, multicenter, observational cohort study was conducted across 15 tertiary hospitals in Saudi Arabia, involving 1,490 ICU-admitted COVID-19 patients between March 1, 2020, and October 30, 2020. Data on patient demographics, comorbidities, laboratory results, and treatment outcomes were collected using the Research Electronic Data Capture (REDCap) system. The study evaluated the effect of different treatments on NLR, neutrophil count (NC), and lymphocyte count (LC). Results: This study utilized 1,490 patients in the study of whom 73.6% were male and 26.1% were female. The average age of patients was 56.2 years, with a mean NLR of 8.77 ± 8.64, showing significant systemic inflammation. Tocilizumab ( Conclusion: Among the evaluated therapies, tocilizumab and oseltamivir showed a consistent trend of lower NLR values in both survivors and non-survivors, compared to those not receiving these treatments. These findings suggest that tocilizumab and oseltamivir may offer some efficacy in modulating immune response (as measured by NLR) and potentially improving outcomes. However, due to observed weak correlations no single therapy alone appears sufficient to predict or reduce mortality, emphasizing the need for multimodal treatment strategies and further investigation into combined biomarker models.
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Registered trials
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