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Chinese Journal of Experimental and Clinical Infectious Diseases(Electronic Edition) ›› 2018, Vol. 12 ›› Issue (06): 559-564. doi: 10.3877/cma.j.issn.1674-1358.2018.06.008

Special Issue:

• Research Article • Previous Articles     Next Articles

Neutrophil-lymphocyte ratio as a prognostic factor in severe hand, foot and mouth disease

Yaping Li1, Song Zhai1,(), Mei Li1, Yuan Wang1, Huiling Deng2, Xin Zhang1, Shuangsuo Dang1   

  1. 1. Department of Infectious Disease, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710004, China
    2. Department of Infectious Disease, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710004, China; Department of Infectious Diseases, Xi’an Children’s Hospital, Xi’an 710043, China
  • Received:2018-05-02 Online:2018-12-15 Published:2018-12-15
  • Contact: Song Zhai
  • About author:
    Corresponding author: Zhai Song, Email:

Abstract:

Objective

To investigate the clinical implication of the neutrophil to lymphocyte ratio (NLR) in predicting the severity of hand, foot and mouth disease (HFMD).

Methods

From May 2008 to December 2017, a total of 1 593 children with HFMD were collected from The Second Affiliated Hospital of Xi’an Jiaotong Univesity and Xi’an Children’s Hospital. According to the degree of illness, they were divided into mild HFMD group (929 cases) and severe HFMD group (664 cases). The best critical value of neutrophil/lymphocyte ratio (NLR) for predicting the severity of HFMD was calculated by receiver operating characteristic curve (ROC curve). According to NLR, 1 593 children were divided into high NLR group and low NLR group. Multivariate two-classification Logistic regression analysis was used to analyze the correlation between the factors and the severity of children with HFMD.

Results

Fever, hyperpyrexia, nervous system symptom, circulatory system symptom, leukocyte (WBC), NLR, procalcitonin (PCT), blood sugar, enterovirus 71 IgM antibody (EV71-IgM) positive and infection with Epstein-Barr virus (EBV) were all with significant differences in severe HFMD group compared with those of mild HFMD group (all P < 0.05). The optimal critical value of NLR ratio to predict severity was 1.59 detected by ROC curve. Multivariate Logistic regression analysis showed that high fever (> 39 ℃), positive EV71-IgM, complicated with EBV infection, blood glucose > 8.3 mmol/L, PCT > 0.1 ng/ml and NLR > 1.59 were all risk factors for severe HFMD. The ratio of odds ratio (OR) were 1.557, 5.124, 3.533, 7.323, 1.727 and 2.031, respectively (all P < 0.01).

Conclusions

NLR > 1.59 is closely related to the severity of HFMD, which has important predictive value. NLR is one of the clinical indexes to guide the clinical decision and treatment of children with HFMD.

Key words: Hand, foot and mouth disease, Neutrophil-to-lymphocyte ratio, Severity, Risk factor

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