一个因果调解模型,用于纵向调解器和生存结果,并适用于动物行为
Shuxi Zeng1, Elizabeth C Lange2, Elizabeth A Archie3
1Facebook, Inc., Seattle, WA, USA.
概括
生命早期的逆境直接影响的生存,生理应激反应并没有显著调解这种效应. 这项研究引入了一个新的因果调解模型,用于不规则的纵向数据和生存结果.
科学领域:
- 生态学和进化生物学.
- 生物统计学 生物统计学
- 动物行为 动物行为
背景情况:
- 因果调解分析对于理解动物行为中的暴露结果途径至关重要.
- 现有的模型在不规则的时间网格和生存结果上与纵向介质作斗争.
- 需要一种新的方法来分析纵向动物研究中的复杂因果关系.
研究的目的:
- 为任意时间网格和生存结果上的纵向媒介提出因果调解模型.
- 调查早期逆境,成年人的压力反应和野生的生存之间的因果关系.
- 为分析行为生态学的复杂纵向数据提供灵活的统计框架.
主要方法:
- 功能数据分析视角将调解器视为随机过程.
- 功能主要组件分析 (FPCA) 用于中介过程估计.
- 考克斯对生存结果的比例危险模型,包括估计的调解器过程.
- 用于因果效应估计的g计算公式.
- 对于顺序无视性假设的灵敏度分析.
主要成果:
- 生命早期的逆境对雌性的预期寿命和生存有显著的直接影响.
- 很少有证据表明,成年人的生理应激反应调解了早期逆境对生存的影响.
- 拟议的模型成功地容纳了不规则的纵向介质和生存数据.
结论:
- 早期的逆境是生存的直接决定因素,独立于成年压力标志物.
- 开发的因果调解框架适用于复杂的纵向生态数据.
- 未来的研究应该探索其他潜在的调解者或完善应激反应测量.
相关概念视频
Assumptions of Survival Analysis
157
Survival models analyze the time until one or more events occur, such as death in biological organisms or failure in mechanical systems. These models are widely used across fields like medicine, biology, engineering, and public health to study time-to-event phenomena. To ensure accurate results, survival analysis relies on key assumptions and careful study design.
157
Introduction To Survival Analysis
289
Survival analysis is a statistical method used to study time-to-event data, where the "event" might represent outcomes like death, disease relapse, system failure, or recovery. A unique feature of survival data is censoring, which occurs when the event of interest has not been observed for some individuals during the study period. This requires specialized techniques to handle incomplete data effectively.
The primary goal of survival analysis is to estimate survival time—the time...
The primary goal of survival analysis is to estimate survival time—the time...
289
Censoring Survival Data
145
Survival analysis is a statistical method used to analyze time-to-event data, often employed in fields such as medicine, engineering, and social sciences. One of the key challenges in survival analysis is dealing with incomplete data, a phenomenon known as "censoring." Censoring occurs when the event of interest (such as death, relapse, or system failure) has not occurred for some individuals by the end of the study period or is otherwise unobservable, and it might have many different...
145
Cognitive Theories: Lazarus Mediational Theory of Emotion
977
Richard Lazarus' cognitive mediational theory highlights the pivotal role of cognitive appraisal in shaping emotional responses. According to this theory, the evaluation of a stimulus — based on personal values, goals, beliefs, and expectations — mediates the emotional response. This appraisal process is immediate and often occurs unconsciously, influencing the intensity and nature of the resulting emotion.
Cognitive Appraisal and Emotional Response
Lazarus proposed that...
Cognitive Appraisal and Emotional Response
Lazarus proposed that...
977
Comparing the Survival Analysis of Two or More Groups
227
Survival analysis is a cornerstone of medical research, used to evaluate the time until an event of interest occurs, such as death, disease recurrence, or recovery. Unlike standard statistical methods, survival analysis is particularly adept at handling censored data—instances where the event has not occurred for some participants by the end of the study or remains unobserved. To address these unique challenges, specialized techniques like the Kaplan-Meier estimator, log-rank test, and...
227
Longitudinal Research
12.0K
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...
12.0K


