使用随机试验数据评估COVID-19疫苗有效性测试负面设计:对5个随机临床试验的二次交叉协议分析
Leah I B Andrews1, M Elizabeth Halloran1,2, Kathleen M Neuzil3
1Department of Biostatistics, School of Public Health, University of Washington, Seattle.
JAMA network open
|May 28, 2025
概括
测试负面设计 (TND) 可靠地评估COVID-19疫苗对症状疾病的有效性. 这种方法与随机临床试验结果一致,为营销后疫苗监测提供了有效的方法.
科学领域:
- 流行病学 流行病学
- 疫苗学 疫苗学 疫苗学
- 生物统计学 生物统计学
背景情况:
- 测试负面设计 (TND) 经常用于营销后的COVID-19疫苗有效性研究.
- 对于此应用程序,需要对TND进行进一步验证.
研究的目的:
- 评估TND在评估针对症状性COVID-19的疫苗有效性的可靠性.
- 将TND估计值与来自安慰剂控制随机临床试验 (RCT) 的疫苗疗效数据进行比较.
主要方法:
- 通过使用来自16个国家的5个协调的COVID-19预防网络RCT的3期RCT的数据进行了交叉协议分析.
- 从具有COVID-19类似症状的参与者中构建了TND数据集,这些参与者被测试了SARS-CoV-2.
- 使用目标最大概率估计和普通后勤回归来估计疫苗的有效性,评估非病例可替换性与非COVID-19疾病.
主要成果:
- TND疫苗的有效性估计显示与RCT疫苗有效性估计有很强的一致性 (一致性相关系数:0.86).
- 一种半参数方法导致差异估计比普通逻辑回归小48%.
- 非病例可交换性普遍得到支持,疫苗对非COVID-19疾病的中位数疗效为7.7%.
结论:
- 在寻求医疗保健的人群中,TND为COVID-19疫苗的有效性提供了可靠的推断.
- 当控制混和选择偏差时,TND对多种疫苗和症状定义有效.
- 引入了一种机器学习方法,用于在营销后TND研究中加强混控制.
更多相关视频
08:36Author Spotlight: Evaluating the Adjuvant Efficacy and Safety of Angong Niuhuang Pill in Viral Encephalitis Treatment
Published on: April 19, 2024
713
04:53A Clinical Trial Assessing the Safety, Efficacy, and Delivery of Olive-Oil-Based Three-Chamber Bags for Parenteral Nutrition
Published on: September 20, 2019
10.8K
相关概念视频
01:16Clinical Trials
9.3K
Clinical trials are prospective experimental studies conducted on humans to determine the safety and efficacy of treatments, drugs, diet methods, and medical devices. Using statistics in clinical trials enables researchers to derive reasonable and accurate conclusions from the collected data, allowing them to make wise decisions in uncertain situations. In medical research, statistical methods are crucial for preventing errors and bias.
There are four phases in a clinical trial. A phase one...
There are four phases in a clinical trial. A phase one...
9.3K
01:16Crossover Experiments
3.7K
Crossover experiments, also called the repeated-measurements design, is a study design in which all experimental units are exposed to all treatments in different periods. Crossover experiments are generally used in psychology, the pharmaceutical industry, agriculture, and medicine.
Crossover designs are performed even with smaller sample sizes since the samples can act as their controls. These are better than simple randomized trials since patients are exposed to all the treatments.
Crossover designs are performed even with smaller sample sizes since the samples can act as their controls. These are better than simple randomized trials since patients are exposed to all the treatments.
3.7K
01:12What is an Experiment?
15.3K
An experiment is a planned activity carried out under controlled conditions. The purpose of an experiment is to investigate the relationship between two variables. When one variable causes change in another, we call the first variable the explanatory or independent variable. The affected variable is called the response or dependent variable. In a randomized experiment, the researcher manipulates values of the explanatory variable and measures the resulting changes in the response variable. The...
15.3K
01:20Study Designs in Epidemiology
441
Epidemiological study designs are fundamental tools for investigating the distribution, determinants, and control of health conditions in populations. They help researchers understand the relationships between exposures and outcomes, and they broadly fall into two categories: "observational" and "experimental" studies.
Observational studies are those where the researcher does not intervene but rather observes natural variations. They include cross-sectional, cohort, and...
Observational studies are those where the researcher does not intervene but rather observes natural variations. They include cross-sectional, cohort, and...
441
01:23Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches
184
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,...
184
01:11Clinical Trials: Overview
3.4K
Clinical development focuses on how the drug will interact with the human body and encompasses four key phases of clinical trials, each serving a specific purpose in assessing the safety and effectiveness of new drugs. These phases overlap and build upon one another. Phase I involves a small group of healthy volunteers (typically 20-80 individuals) or, in cases where significant toxicity is expected, patients with the targeted disease, such as cancer or AIDS. The volunteers are tested for...
3.4K