动态预测与多变长度指数结果和长度指数磁共振成像数据数据
Haotian Zou1, Luo Xiao2, Donglin Zeng3
1Department of Biostatistics and Bioinformatics, Duke University.
The annals of applied statistics
|June 30, 2025
概括
这项研究引入了一种新的模型,用于预测阿尔茨海默病 (AD) 发病,使用多式联络数据,包括MRI扫描. 这些发现突出了与痴呆风险增加相关的遗传和疾病进展因素.
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
- 医疗成像医学成像
背景情况:
- 阿尔茨海默病 (AD) 是一种流行的神经退行性疾病,影响认知功能.
- 来自诸如阿尔茨海默病神经成像计划 (ADNI) 等研究的多模式数据对于了解AD进展至关重要.
- 对于高风险个体的个性化药物,需要准确的预测模型.
研究的目的:
- 开发一个多变量功能混合模型,使用纵向MRI数据 (MFMM-LMRI) 来预测痴呆的发病.
- 将纵向神经学评分,声向MRI数据和生存结果整合到一个统一的预测框架中.
- 为个人痴呆风险评估建立一个动态预测系统.
主要方法:
- 提出了一个多变量功能混合模型与纵向MRI数据 (MFMM-LMRI).
- 使用联合和个体变异解释 (JIVE) 方法进行纵向MRI数据建模.
- 采用马尔科夫链蒙特卡洛 (MCMC) 进行后端采样,并开发了一个动态预测框架.
主要成果:
- 模拟研究证实了该方法在各种样本大小和事件率的有效性.
- 对ADNI研究的应用表明,ApoE-ε4等位基因和更高的潜在疾病概况会增加痴呆风险.
- 在纵向MRI数据和痴呆症发病之间发现了显著的关联,即时模型显示出卓越的性能.
结论:
- 该MFMM-LMRI模型有效地整合了多式联络数据,用于预测阿尔茨海默病的进展和发病.
- 确定了与痴呆相关的关键风险因素,包括遗传标记和疾病轨迹.
- 开发的动态预测框架为AD的个性化风险评估提供了有价值的见解.
相关概念视频
Longitudinal Research
12.5K
Sometimes we want to see how people change over time, as in studies of human development and lifespan. When we test the same group of individuals repeatedly over an extended period of time, we are conducting longitudinal research. Longitudinal research is a research design in which data-gathering is administered repeatedly over an extended period of time. For example, we may survey a group of individuals about their dietary habits at age 20, retest them a decade later at age 30, and then again...
12.5K
Longitudinal Studies
254
Longitudinal studies are also widely used in other medical and social science fields. For instance, in cardiovascular research, they can monitor patients' health over decades to identify risk factors for heart disease, such as high cholesterol or smoking, and evaluate the long-term effectiveness of preventive measures. Similarly, in mental health studies, researchers might follow individuals from adolescence into adulthood to understand the development and progression of conditions like...
254
Magnetic Resonance Imaging
7.2K
Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
7.2K
Mechanistic Models: Compartment Models in Individual and Population Analysis
89
Mechanistic models are utilized in individual analysis using single-source data, but imperfections arise due to data collection errors, preventing perfect prediction of observed data. The mathematical equation involves known values (Xi), observed concentrations (Ci), measurement errors (εi), model parameters (ϕj), and the related function (ƒi) for i number of values. Different least-squares metrics quantify differences between predicted and observed values. The ordinary least...
89
Multicompartment Models: Overview
260
Multicompartment models are mathematical constructs that depict how drugs are distributed and eliminated within the body. They segment the body into several compartments, symbolizing various physiological or anatomical areas connected through drug transfer processes such as absorption, metabolism, distribution, and elimination.
These models offer a more comprehensive representation of drug behavior in the body than one-compartment models. They accommodate the complexity of drug distribution,...
These models offer a more comprehensive representation of drug behavior in the body than one-compartment models. They accommodate the complexity of drug distribution,...
260
Imaging Studies IV: Magnetic Resonance Imaging
59
Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
59


