Association of Red Cell Distribution Width to Albumin Ratio (RAR) with Mortality Outcomes in ICU Patients Suffering from Sepsis-Related ARDS: A Retrospective Analysis Utilizing MIMIC-IV Data - Report - MDSpire

Association of Red Cell Distribution Width to Albumin Ratio (RAR) with Mortality Outcomes in ICU Patients Suffering from Sepsis-Related ARDS: A Retrospective Analysis Utilizing MIMIC-IV Data

  • By

  • Hongzhou Wu

  • Min He

  • Yujia Gui

  • Jinyi Zhou

  • Liting Yue

  • Xiaoqin Zhang

  • February 28, 2026

  • 0 min

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Clinical Report: Association of Red Cell Distribution Width to Albumin Ratio with Mortality Outcomes in ICU Patients Suffering from Sepsis-Related ARDS

Overview

This study investigates the association between the red cell distribution width to albumin ratio (RAR) and all-cause mortality in ICU patients with sepsis-related acute respiratory distress syndrome (SA-ARDS). Findings suggest that RAR may serve as a prognostic marker for mortality in this high-risk population.

Background

Sepsis-associated acute respiratory distress syndrome (SA-ARDS) presents a significant challenge in critical care, with in-hospital mortality rates reaching 43.2%. Early identification of high-risk patients is crucial for improving outcomes. The combination of red cell distribution width (RDW) and albumin (Alb) levels into a ratio (RAR) may provide insights into a patient's inflammatory state and nutritional status, potentially aiding in risk stratification.

Data Highlights

No numerical data available in the source material.

Key Findings

  • RAR may reflect a patient's inflammatory state, endothelial integrity, and nutritional status.
  • Increased RDW is associated with inflammation and oxidative stress, linked to worse outcomes in sepsis and ARDS.
  • Hypoalbuminemia is correlated with pulmonary edema and ARDS severity.
  • Early identification of SA-ARDS patients using RAR could improve treatment strategies and survival rates.
  • The study utilized data from the MIMIC-IV database, focusing on adult patients meeting ARDS and sepsis criteria.

Clinical Implications

Healthcare professionals should consider RAR as a potential prognostic marker for mortality in patients with SA-ARDS. Early identification of patients at high risk may facilitate timely interventions and improve clinical outcomes.

Conclusion

The findings support the use of RAR as a composite marker for predicting mortality in SA-ARDS patients, highlighting its potential role in clinical decision-making.

References

  1. BMC Psychiatry (Springer), 2025 -- Association between RAR and the prevalence and prognosis of suicidal ideation: evidence from a large population-based study
  2. Intensive Care Medicine -- Association of Plasma sRAGE Levels with Mortality Risk in ARDS: A Meta-Analysis of Individual Patient Data
  3. Critical Care (Springer) -- Utilizing Albumin-Corrected Calcium Ratios to Enhance Detection of Citrate Accumulation and Improve Mortality Forecasting in Continuous Kidney Replacement Therapy
  4. Clinical Rheumatology -- Evaluating Red Blood Cell Distribution Width as a Prognostic Indicator for Survival in Pulmonary Arterial Hypertension Linked to Primary Sjogren’s Syndrome: A Retrospective Cohort Analysis
  5. Surviving Sepsis Campaign Adult Guidelines | SCCM
  6. Incidence and predictors of acute respiratory distress syndrome in sepsis: a systematic review and meta-analysis - PMC
  7. Association between red cell distribution width to albumin ratio and short-term mortality in patients with septic myocardial injury: a multicenter analysis - PMC
  8. Surviving Sepsis Campaign Adult Guidelines | SCCM
  9. Incidence and predictors of acute respiratory distress syndrome in sepsis: a systematic review and meta-analysis - PMC
  10. Association between red cell distribution width to albumin ratio and short-term mortality in patients with septic myocardial injury: a multicenter analysis - PMC

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