检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:刘巧兰[1] 沈卓之[1] 陈峰[2] 李晓松[1] 杨珉[3]
机构地区:[1]四川大学华西公共卫生学院,成都610041 [2]南京医科大学公共卫生学院 [3]英国伦敦大学玛丽女王医学院
出 处:《中华流行病学杂志》2009年第12期1302-1306,共5页Chinese Journal of Epidemiology
基 金:基金项目:美国纽约中华医学基金会(CMB)资助项目(00-722)
摘 要:【导读】探讨多水平模型在生物等效性评价中的应用价值。以2×4试验设计的抗高血压药生物等效性评价为研究实例,研究多水平模型对效应指标值的变异即方差的分解方式,并与FDA推荐的矩法所获得的方差分量进行比较。对比传统FDA推荐的生物等效性评价标准,研究利用多水平模型直接进行平均等效性、群体等效性和个体等效性评价的可行性。对于2×4试验设计的单变量两水平模型获得In(AUC)指标的方差分量如试验药丁的总方差σTT^2、个体间方差σBT^2和个体内方差σwt^2刍以及参比药R的总方差σTR^2、个体间方差σBR^2未和个体内方差σWR^2,与FDA推荐的矩法所获得的结果非常接近。实际应用中,根据FDA提出的生物等效性评价的标准和程序进行评价,直接用多水平模型的估计值进行平均、群体和个体等效性评价,两者结果一致。多水平模型适合于交叉设计的生物等效性评价,相对于FDA推荐的方法,多水平模型对于复杂的有影响因素的交叉试验设计更容易估计方差分量,进而可以评价平均、群体和个体等效性,实际应用上更具有灵活性,为生物等效性评价提供了新的思路和方法。[Introduction] This study aims to explore the application value of multilevel models for bioequivalence evaluation. Using a real example of 2 ×4 cross-over experimental design in evaluating bioequivalence of antihypertensive drug, this paper explores complex variance components corresponding to criteria statistics in existing methods recommended by FDA but obtaines in multilevel models analysis. Results are compared with those from FDA standard Method of Moments, specifically on the feasibility and applicability of multilevel models in directly assessing the bioequivalence (ABE) , the population bioequivalence (PBE) and the individual bioequivalence (IBE). When measuring In (AUC) , results from all variance components of the test and reference groups such as total varxance ( σTT^2 andσTR^ 2 ), between-subject variance (σBT^2 and σBR^2) and within-subj ect variance (σWT^2 and σWR^2 ) estimated by simple 2-level models are very close to those that using the FDA Method of Moments. In practice, bioequivalence evaluation can be carried out directly by multilevel models, or by FDA criteria, based on variance components estimated from multilevel models. Both approaches produce consistent results. Multilevel models can be used to evaluate bioequivalence in cross-over test design. Compared to FDA methods, this one is more flexible in decomposing total variance into sub components in order to evaluate the ABE, PBE and IBE. Multilevel model provides a new way into the practice of bioequivalence evaluation.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:3.148.200.145