在剂量范围研究中,贝叶斯准概率设计用于确定最小有效剂量和最大功效剂量
Feng Tian1, Ruitao Lin1, Li Wang2
1Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
Statistical methods in medical research
|April 4, 2024
概括
这项研究引入了一种新的贝叶斯剂量范围设计,平衡药物的安全性和有效性. 它确定了最小有效剂量和最大功效剂量,以获得最佳的治疗益处-风险权衡.
科学领域:
- 生物统计学 生物统计学
- 临床试验设计 临床试验设计
- 药物指标 (Pharmacometrics) 是一个指标.
背景情况:
- 传统的剂量范围研究优先考虑剂量有效性评估和最小有效剂量的确定.
- 越来越需要基于全面的利益风险评估来优化药物剂量.
研究的目的:
- 提出贝叶斯准概率剂量范围设计,同时确定最小有效剂量和最大功用剂量.
- 通过共同考虑安全性和有效性终点来优化利益风险权衡.
- 为了建立剂量-反应关系的概念证明.
主要方法:
- 使用贝叶斯准概率方法与二进制毒性的β-双项模型.
- 在没有参数假设的情况下,用于有效性终点 (二进制,顺序,连续) 的准概率.
- 结合了利益风险权衡和适应性患者分配的实用功能.
- 采用分组顺序设计,并使用中间剂量下降 (毒性/无效性) 和后期概率标准进行概念验证.
主要成果:
- 拟议的设计在与现有方法相比,在模拟中显示出稳健性和竞争性性能.
- 成功建立了概念验证,并确定了最小有效剂量和最大功用剂量.
- 该设计通过整合安全性和有效性数据,有效地优化了效益风险权衡.
结论:
- 贝叶斯准概率剂量范围设计通过平衡有效性和安全性来优化药物剂量的优越方法.
- 它为确定关键剂量指标 (MED,MUD) 和建立概念验证提供了一个强大的框架.
- 这种设计通过适应性策略提高了临床试验效率和药物开发决策.
更多相关视频
10:33Expedited Radiation Biodosimetry by Automated Dicentric Chromosome Identification ADCI and Dose Estimation
Published on: September 4, 2017
15.7K
07:57Positron Emission Tomography-based Dose Painting Radiation Therapy in a Glioblastoma Rat Model using the Small Animal Radiation Research Platform
Published on: March 24, 2022
2.8K
相关概念视频
00:59Model-Independent Approaches for Pharmacokinetic Data: Noncompartmental Analysis
62
Noncompartmental analyses offer an alternative method for describing drug pharmacokinetics without relying on a specific compartmental model. In this approach, the drug's pharmacokinetics are assumed to be linear, with the terminal phase log-linear. This assumption allows for simplified analysis and interpretation of the drug's behavior in the body.
One important characteristic of noncompartmental analyses is that drug exposure increases proportionally with increasing doses. This...
One important characteristic of noncompartmental analyses is that drug exposure increases proportionally with increasing doses. This...
62
01:03Dose-Response Relationship: Overview
3.1K
Agonists can bind with and activate receptors, resulting in the formation of drug-receptor complexes. Once formed, these complexes catalyze many biochemical processes at the cellular level and subsequently induce a pharmacologic response. The degree of response is directly proportional to the fraction of activated receptors, which in turn, depends on the concentration of the drug at the receptor site as well as the sensitivity of the receptor. An increase in the administered dose contributes to...
3.1K
01:23Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches
126
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,...
126
01:26Pharmacokinetic Models: Comparison and Selection Criterion
70
Physiological and compartmental models are valuable tools used in studying biological systems. These models rely on differential equations to maintain mass balance within the system, ensuring an accurate representation of the dynamic processes at play.
Physiological models take a detailed approach by considering specific molecular processes. They can predict drug distribution, metabolism, and elimination changes, providing a comprehensive understanding of how drugs interact with the body.
Physiological models take a detailed approach by considering specific molecular processes. They can predict drug distribution, metabolism, and elimination changes, providing a comprehensive understanding of how drugs interact with the body.
70
01:23Mechanistic Models: Compartment Models in Individual and Population Analysis
39
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...
39
01:12Analysis of Population Pharmacokinetic Data
254
Analysis of population pharmacokinetic data involves studying the behavior of drugs within diverse populations to understand their pharmacokinetic parameters. Traditional pharmacokinetic methods typically involve collecting samples from a few individuals and estimating these parameters. While these methods are commonly used, they have limitations in capturing the variability in drug response among individuals or heterogeneous populations. Population pharmacokinetics is employed to address these...
254