离子与败血症患者28天死亡率之间的非线性关系:来自MIMIC-IV数据库的回顾性队列研究
Zhanyao Liang1,2, Congqi Hu3, Yuanshen Zhou4
1The Second Clinical Medical College of Guangzhou University of Chinese Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China.
BMJ open
|November 17, 2025
概括
败血症患者的电离 (iCa) 水平显示出与28天死亡率的U形关系. 轻微低的iCa水平与增加的死亡风险有关,突出了潜在的干预目标.
科学领域:
- 关键护理医学 关键护理医学
- 生物化学 生物化学
- 流行病学 流行病学
背景情况:
- 败血症是一种危及生命的疾病,其特点是宿主对感染的反应失调.
- 电离 (iCa) 在各种生理过程中起着至关重要的作用,其水平在重症患者中可能发生变化.
- 了解iCa与败血症结果之间的关系对于优化患者管理至关重要.
研究的目的:
- 为了研究电离水平与重症监护室 (ICU) 败血症患者28天死亡率之间的关联.
- 探索ICA和死亡率之间的线性和非线性关系.
- 为未来的实验室测试和补充策略在败血症的研究产生假设.
主要方法:
- 使用MIMIC-IV数据库中的数据进行回顾性队列研究.
- 包括17,955名成年败血症患者 (败血症-3标准),不包括那些缺少iCa数据的患者.
- 在ICU入院后24小时内分析iCa水平,使用多变量逻辑回归,通用添加模型 (GAM) 和两部分线性回归来评估与28天死亡率的关联.
主要成果:
- 整体28天死亡率为18.3%.
- 在iCa水平和28天死亡率之间观察到一个显著的U形关联,转折点为1.16 mmol/L.
- 较低的iCa水平 (<1.16 mmol/L) 与每0.1 mmol/L的死亡风险增加13%有关,而较高的水平 (>1.16 mmol/L) 表示每0.1 mmol/L的死亡风险增加6%.
结论:
- 在败血症患者中,电离和28天死亡率之间的关系是U形的.
- 确定了1.16 mmol/L的拐点,在轻度低血的范围内.
- 这些发现表明,低水平和高水平的电离可能对败血症有害,因此需要进一步研究最佳的管理.
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