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用多变量纵向标记和临床终点的关节潜伏类模型描述复杂的疾病进展
Cécile Proust-Lima1,2, Tiphaine Saulnier1, Viviane Philipps1
1Univ. Bordeaux, Inserm, Bordeaux Population Health Research Center, U1219, Bordeaux, France.
Statistics in medicine
|July 18, 2023
概括
这项研究引入了一种新的统计模型,用于识别复杂的神经退行性疾病 (如多重系统缩 (MSA)) 中的不同患者子组. 该方法揭示了五种独特的MSA亚现象,改善了对疾病进展的理解和预后的预测.
科学领域:
- 神经科学是一个神经科学.
- 生物统计学 生物统计学
- 医学统计 医学统计
背景情况:
- 神经退行性疾病呈现复杂,多维的进展,具有各种标志物和临床终点.
- 准确描述疾病进展对于理解自然史,分期患者和预测预后至关重要.
- 多重系统缩 (MSA),一种罕见的同核蛋白病变,以其异质呈现和不良预后为例,说明了这些挑战.
研究的目的:
- 开发和验证用于建模复杂疾病进展和识别患者亚现象型的统计方法.
- 将这种方法应用于多个系统缩 (MSA) 进展的具体情况.
- 通过发现不同的疾病轨迹来探索新的病理假设.
主要方法:
- 采用了联合隐性类型建模方法,整合了重复标记的多变量混合模型和时间到事件数据的比例危险模型.
- 该模型考虑了多变量重复的生物标志物,潜在的潜在维度以及类和原因特定的风险.
- 使用了最大概率估计,使用 lcmm R 包中可用的方法,并通过模拟进行验证.
主要成果:
- 在法国一组598名患者中发现了5种不同的MSA亚型,这些患者被跟踪了长达13年.
- 这些子类型在生物标志物降解的模式和速度及其相关的死亡风险方面存在显著差异.
- 用子类型的成员身份来探索与外部成像和流体生物标记物的关联,从而解释了成员身份的不确定性.
结论:
- 隐性类型建模为描述复杂疾病进展和确定神经退行性疾病中临床相关的亚现象类型提供了强大的工具.
- 已识别的MSA亚型为人们提供了对疾病异质性的更精细的理解,并可以指导未来的研究研究具体的病理机制和治疗点.
- 这种方法提高了预测预后的能力,并可能根据不同的疾病轨迹来个性化患者管理策略.
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