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Chinese Journal of Hygiene Rescue(Electronic Edition) ›› 2025, Vol. 11 ›› Issue (03): 140-146. doi: 10.3877/cma.j.issn.2095-9133.2025.03.003

Special Issue:

• Original Article • Previous Articles     Next Articles

Relationship between the dynamic neutrophil-to-lymphocyte ratio and the occurrence of disseminated intravascular coagulation in patients with severe pneumonia

Wanlin Shen, Fujing Liu, Na Ma, He Zhang, Tijun Gu()   

  1. Department of Emergency, The Second People's Hospital of Changzhou, the Third Affiliated Hospital of Nanjing Medical University, Changzhou 213000, China
  • Received:2025-03-31 Online:2025-06-18 Published:2025-08-27
  • Contact: Tijun Gu

Abstract:

Objective

To investigate the relationship between dynamic changes in neutrophil-to-lymphocyte ratio (NLR) and the occurrence of disseminated intravascular coagulation (DIC) in patients with severe pneumonia.

Methods

A total of 340 patients with severe pneumonia hospitalized in Changzhou Second People's Hospital from January 2019 to December 2023 were retrospectively analyzed, and the cohort comprised 264 males and 76 females, aged 28 to 101 years, with a mean age of 73.56±13.65 years. These patients were divided into non-DIC (n=271) and DIC (n=69) groups based on complications. The generalized estimation equation was used to analyze the time-alone effect and the intergroup main effect of NLR in two groups; Logistic regression was used to analyze the effect of NLR on DIC at different time points, and the receiver operating characteristic (ROC) curve was plotted to evaluate the predictive value of dynamic NLR in the development of DIC in patients with severe pneumonia.

Results

The results of the generalized estimation equation showed that there was no statistical difference in NLR between DIC patients and non-DIC patients when they entered the emergency room, but the NLR of DIC patients gradually increased with time, while the NLR of non-DIC patients gradually decreased (P<0.001). Multivariate Logistic regression analysis showed that NLR 24 hours, 48 hours and 72 hours after admission were all risk factors for severe pneumonia complicated with DIC (P<0.05). ROC curve analysis showed that NLR (AUC=0.75) at 72 hours after admission was higher than that at 24 hours (AUC=0.60) and 48 hours (AUC=0.63).

Conclusions

Persistent hyperinflammatory response leads to DIC in patients with severe pneumonia. Dynamic changes in NLR can help in early identification of the risk of DIC in severe pneumonia.

Key words: Severe pneumonia, Dynamic neutrophil-to-lymphocyte ratio changes, DIC

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