定义和估计疫苗接种计划直接避免的结果,当疫苗接种随着时间的推移而发生时
Katherine M Jia1, Christopher B Boyer2,3, Alyssa Bilinski4,5
1Center for Communicable Disease Dynamics, Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA.
ArXiv
|November 24, 2025
概括
这项研究阐明了如何准确地测量疫苗的有效性,定义了"直接避免"的死亡,并显示它是预防总死亡的下限. 它还确定了疫苗影响的常见估计方法中的偏差.
科学领域:
- 流行病学 流行病学
- 生物统计学 生物统计学
- 公共卫生 公共卫生
背景情况:
- 估计COVID-19疫苗接种所避免的死亡人数至关重要.
- 以前的研究往往侧重于"直接避免"的死亡,可能低估了整体影响.
- 准确测量疫苗的有效性对于公共卫生政策至关重要.
研究的目的:
- 定义和量化疫苗接种"直接避免"的结果,仅考虑接种疫苗的人.
- 在随机对照试验 (RCT) 中为这种因果估计开发一个不偏见的估计器.
- 分析现有估计器的偏差,例如"危险差异"方法.
主要方法:
- 因果推理框架来定义"直接避免"的结果.
- 为一阶段RCT开发一个不偏见的估计器.
- 模拟研究将拟议的估计器与"危险差异"估计器进行比较.
- 探索"可避免结果"的估计和估计器.
主要成果:
- "直接避免"的结果估计作为总避免结果的下限,当间接影响非负面时.
- "风险差异"估计器在RCT中具有偏见,如果由于"易感体枯竭"而导致疫苗接种具有非零效应.
- "危险差异"估计器中的偏差对于低感染死亡率的避免死亡是很小的,但对于高生殖数量的避免感染可能是很大的.
结论:
- 拟议的因果估计提供了更准确的疫苗接种对接种疫苗的人的影响衡量.
- 要想对疫苗的有效性进行公正的估计,就必须意识到"易感细胞的枯竭".
- 需要进一步的研究,以在观察性研究中应用这些因果关系方法.
相关概念视频
Vaccinations
51.2K
Overview
51.2K
Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches
387
Biopharmaceutical studies constitute a vital field aiming to enhance drug delivery methods and refine therapeutic approaches, drawing upon diverse interdisciplinary knowledge. In research methodologies, the choice between controlled and non-controlled studies significantly influences the study's reliability and accuracy.
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast,...
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast,...
387
Steps in Outbreak Investigation
472
In the ever-evolving field of public health, statistical analysis serves as a cornerstone for understanding and managing disease outbreaks. By leveraging various statistical tools, health professionals can predict potential outbreaks, analyze ongoing situations, and devise effective responses to mitigate impact. For that to happen, there are a few possible stages of the analysis:
472
Cancer Vaccines
936
Cancer treatment vaccines are a rapidly evolving field that offers a promising approach to immunotherapy. Unlike traditional vaccines that prevent diseases, cancer treatment vaccines are designed to treat existing cancers by stimulating the immune system to recognize and attack cancer cells.
Cancer vaccines come in two categories: preventive (prophylactic) and treatment (active). Preventive vaccines, such as the Human Papillomavirus (HPV) vaccine, protect against viruses that cause certain...
Cancer vaccines come in two categories: preventive (prophylactic) and treatment (active). Preventive vaccines, such as the Human Papillomavirus (HPV) vaccine, protect against viruses that cause certain...
936
Pharmacovigilance
1.6K
Post-marketing surveillance is a critical component of pharmaceutical regulation, often uncovering unanticipated adverse drug reactions (ADRs) once a drug is widely used over an extended period.
This process, termed pharmacovigilance, aims to detect, evaluate, and minimize harmful effects related to medication use. The data collection for pharmacovigilance depends on spontaneous reporting systems, where healthcare professionals or patients voluntarily report suspected ADRs.
In some cases, there...
This process, termed pharmacovigilance, aims to detect, evaluate, and minimize harmful effects related to medication use. The data collection for pharmacovigilance depends on spontaneous reporting systems, where healthcare professionals or patients voluntarily report suspected ADRs.
In some cases, there...
1.6K
Actuarial Approach
280
The actuarial approach, a statistical method originally developed for life insurance risk assessment, is widely used to calculate survival rates in clinical and population studies. This method accounts for participants lost to follow-up or those who die from causes unrelated to the study, ensuring a more accurate representation of survival probabilities.
Consider the example of a high-risk surgical procedure with significant early-stage mortality. A two-year clinical study is conducted,...
Consider the example of a high-risk surgical procedure with significant early-stage mortality. A two-year clinical study is conducted,...
280


