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Chinese Journal of Cerebrovascular Diseases(Electronic Edition) ›› 2025, Vol. 19 ›› Issue (01): 42-47. doi: 10.3877/cma.j.issn.1673-9248.2025.01.007

• Clinical Research • Previous Articles     Next Articles

The predictive value of peripheral blood neutrophil/lymphocyte ratio, D-dimer and C-reactive protein/albumin ratio for stroke complicated with stroke-associated pneumonia

Gang Wang1,(), Tingting Wu1, Yongcheng Jiang2, Wei Zhang3   

  1. 1. Departmen of Rehabilitation Medicine,Chizhou People's Hospital, Chizhou 247000, China
    2. Departmen of Neurology,Chizhou People's Hospital, Chizhou 247000, China
    3. Departmen of Neurosurgery, Chizhou People's Hospital, Chizhou 247000, China
  • Received:2024-04-11 Online:2025-02-01 Published:2025-04-02
  • Contact: Gang Wang

Abstract:

Objective

To investigate the predictive value of peripheral blood neutrophil-tolymphocyte ratio (NLR), D-dimer, and C-reactive protein (CRP) to albumin (Alb) ratio in stroke patients for the development of stroke-associated pneumonia (SAP).

Methods

A total of 121 stroke patients admitted to Chizhou People's Hospital from February 2021 to December 2023 were retrospectively analyzed. They were divided into two groups based on whether they developed SAP within 7 days of admission: the SAP group(n=28) and the non-SAP group (n=93). The general data and laboratory indices, including NLR, D-dimer,and CRP/Alb ratio, were compared between the two groups. Logistic regression analysis was used to identify the risk factors of SAP, and the receiver operating characteristic (ROC) curve was used to evaluate the predictive efficacy of each index on SAP.

Results

Compared with the non-SAP group, the SAP group had higher mean age [(70.25±6.45) vs (63.35±11.69)] , a higher proportion of patients with diabetes (50.00%vs 29.03%) and elevated levels of NLR, D-dimer, and CRP to Alb ratio in peripheral blood [(3.87±0.85) vs(2.94±0.91); (1.04±0.38) mg/L vs (0.62±0.20) mg/L; (0.86±0.27) vs (0.47±0.15)], with all differences being statistically significant (t=2.984, P=0.004; χ2=4.223, P=0.040; t=4.811, P<0.001; t=7.721, P<0.001;t=9.821, P<0.001). Logistic regression analysis showed that older age (OR=5.726), higher NLR (OR=2.199),higher D-dimer (OR=2.683), and higher CRP to Alb ratio (OR=2.277) were risk factors for SAP (P<0.05).ROC curve analysis showed that NLR, D-dimer, and CRP to Alb ratio had significant predictive ability for SAP in stroke patients, with areas under the curve (AUC) of 0.732, 0.820 and 0.762, respectively. The combined predictive model incorporating all three indices achieved an AUC of 0.907.

Conclusion

Elevated NLR, D-dimer levels, and CRP to Alb ratio are significant risk factors for the development of SAP in stroke patients. The combined application of these three indices can effectively enhance the prediction of SAP occurrence in stroke patients, providing a valuable tool for early intervention and management.

Key words: Stroke-associated pneumonia, Neutrophil-to-lymphocyte ratio, D-dimer, CRP to Alb ratio, Prediction

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