评估和优化新生儿和婴儿的样本大小,用于使用基于模型的方法对Cefiderocol进行儿科临床研究
Daichi Yamaguchi1, Takayuki Katsube1, Toshihiro Wajima2
1Clinical Pharmacology & Pharmacokinetics, Shionogi & Co., Ltd., Osaka, Japan.
Pharmacology research & perspectives
|August 24, 2024
概括
为儿科临床试验优化样本大小至关重要. 在药理动力学建模中使用月经后年龄 (PMA) 显著减少了准确估计 cefiderocol 参数所需的新生儿和婴儿数量.
科学领域:
- 制药指标 (Pharmacometrics) 是一个指标.
- 儿科药理学 儿科药理学
- 临床试验设计 临床试验设计
背景情况:
- 由于新生儿和婴儿的入学困难,儿科临床试验在样本大小优化方面面临挑战.
- 准确的药理动力学参数估计对于儿童群体的药物开发至关重要.
研究的目的:
- 通过以模型为基础的最佳设计方法,评估为儿童用 cefiderocol 制药动力学研究的样本大小优化.
- 评估成人药理动力学数据和各种年龄分类对新生儿和婴儿估计性能的影响.
主要方法:
- 使用随机模拟和估计来评估人口药理动力学参数估计性能.
- 该研究模拟了不同年龄组的不同样本大小分配,包括妊娠年龄,产后年龄和月经后年龄 (PMA).
- 评估了纳入成人药理动力学数据对参数估计准确性和差异性的影响.
主要成果:
- 包括成人药理动力学数据改善了估计性能,降低了变化系数 (CV) 从4.9%-593.7%到2.3%-17.3%的范围.
- 在使用妊娠和产后年龄组 (<20%CV) 时,估计儿科药物动力学参数需要15名新生儿/婴儿.
- 使用月经后年龄 (PMA) 将所需的样本大小减少到7-9个受试者,具体取决于PMA值 (<32,>32周或<37,>37周).
结论:
- 基于模型的最佳设计方法有效评估儿科药理动力学研究的样本大小.
- 月经后年龄 (PMA) 是减少新生儿和婴儿的药理动力学参数估计的样本大小要求的一个关键因素.
- 这种方法为设计儿科临床试验提供了一个有价值的框架,特别是那些涉及非常年轻的受试者.
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