Laboratory Medicine ›› 2026, Vol. 41 ›› Issue (4): 362-368.DOI: 10.3969/j.issn.1673-8640.2026.04.008

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Role of red blood cell distribution width-to-platelet count ratio in predicting the short-term prognosis of patients with ARDS based on the datum analysis of MIMIC-Ⅳ database

WANG Yuan1, CHEN Dan2, HUANG Na3()   

  1. 1 Department of Respiratory and Critical Care MedicineMeishan Second People's HospitalMeishan 620500,Sichuan, China
    2 Department of Respiratory MedicineMeishan City Renshou County Yunchang HospitalMeishan 620500,Sichuan, China
    3 Department of Respiratory and Critical Care Medicinethe First Affiliated Hospital of Chengdu Medical CollegeChengdu 610500,Sichuan, China
  • Received:2024-12-08 Revised:2025-06-16 Online:2026-04-30 Published:2026-05-07

Abstract:

Objective To analyze the role of red blood cell distribution width-to-platelet count ratio(RPR) in predicting the short-term prognosis of patients with acute respiratory distress syndrome(ARDS). Methods The clinical data of ARDS patients in the intensive care unit(ICU) were extracted from the MIMIC-Ⅳ database. The patients were classified into survival group and death group based on their 28 d prognosis. The differences in RPR between the 2 groups were compared. ARDS patients were further classified into high RPR group(RPR≥6.76%) and low RPR group(RPR<6.76%) according to RPR optimal cut-off values. Receiver operating characteristic(ROC) curve was used to evaluate the efficacy of RPR and related disease scores in predicting 28 d mortality in ARDS patients. The differences in prognosis between high RPR group and low RPR group were analyzed through survival curves. Cox risk regression model was used to analyze the influencing factors of 28 d mortality in ARDS patients. Subgroup analysis was conducted based on gender,age and related comorbidities to evaluate the influencing factors related to 28 d mortality in patients with RPR and ARDS. Results The RPR of death group was higher than that of survival group(P<0.001). Elevated RPR was an independent predictor of the 28 d prognosis in patients with ARDS [hazard ratio (HR)=4.05,P<0.001],and the area under curve(AUC) for predicting the 28 d prognosis of ARDS patients was 0.776. The 28 d survival rate in high RPR group was lower than that in low RPR group(P<0.05). The results of subgroup analysis indicated that the correlation between RPR and the 28 d prognosis of ARDS patients had no interaction with gender,age and comorbidities(Pinteraction>0.05). Conclusions Elevated RPR level can be used to predict the 28 d prognosis of patients with ARDS.

Key words: Red blood cell distribution width-to-platelet count ratio, MIMIC-IV database, Acute respiratory distress syndrome, Short-term prognosis

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