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Chinese Journal of Clinical Laboratory Management(Electronic Edition) ›› 2023, Vol. 11 ›› Issue (01): 32-37. doi: 10.3877/cma.j.issn.2095-5820.2023.01.007

• Investigation Research • Previous Articles     Next Articles

Non-linear relationship between in-hospital mortality and fibrinogen levels in patients with acute myocardial infarction

Ning Zhao1, Juanmei Chen2, Qilin Yang3, Pei Mo1,()   

  1. 1. Guangzhou Institute of Cardiovascular Disease, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou Guangdong 510260, China
    2. The Second Clinical College of Guangzhou Medical University, Guangzhou Guangdong 510180, China
    3. Department of Critical Care, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou Guangdong 510260, China
  • Received:2022-09-20 Online:2023-02-28 Published:2023-04-19
  • Contact: Pei Mo

Abstract:

Objective

To investigate the relationship between in-hospital mortality and fibrinogen levels in patients with acute myocardial infarction admitted to the intensive care unit.

Methods

From 2008 to 2019, 1163 patients with acute myocardial infarction in the Medical Information Mart for Intensive Care (MIMIC-Ⅳ) database were selected and grouped according to fibrinogen level quartiles: low fibrinogen group (<1.8 g/L), normal fibrinogen group (1.8~4.0 g/L), and high fibrinogen group (>4.0 g/L). The outcome was mortality in hospital. A restricted cubic spline model and a Cox proportional risk regression model were applied to evaluate the relationship between in-hospital mortality and fibrinogen level in patients with acute myocardial infarction.

Results

After adjusting for associated risk factors, a "U" shaped relationship was observed between in-hospital mortality and fibrinogen levels. The adjusted HR (95% CI) of low-fibrinogen and high-fibrinogen groups were 2.23 (1.49~3.34) and 1.63 (1.12~2.28) respectively. The overall risk of hospital death was the lowest in the normal-fibrinogen group.

Conclusions

There was a "U" shaped relationship between fibrinogen levels and in-hospital mortality in patients with acute myocardial infarction in the ICU. Both high and low fibrinogen were associated with increased in-hospital mortality in patients with acute myocardial infarction.

Key words: fibrinogen, acute myocardial infarction, in-hospital mortality, intensive care unit

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