title: From trial and error to trial simulation. Part 1: the importance of model-based drug development for antidepressant drugs.
abstract: Clinical trial simulation (CTS) allows the investigation of the influence of design characteristics on important aspects of clinical trials such as power and type I error. Simulation scenarios may be critical to decision making and prevention of study failure. The analysis and simulation of clinical trials in depression have, however, suffered from a lack of disease/dropout models that describe the individual time course of the clinical scale of interest. We propose a new model with dual random effects (DREM) derived from functional data analysis, which provides unbiased estimates of parameters and is suitable for the purposes of clinical trial simulation. A comparison of model performance is presented, along with standard statistical methods using various goodness-of-fit criteria. Our results show that data simulated using the DREM closely match individual patient data, including real-life dropout scenarios. In addition, parameterization in terms of interindividual variability ensures easier explanation of findings to clinical scientists, who ultimately make the relevant decisions.
authors: Division of Pharmacology, Leiden/Amsterdam Center for Drug Research, Leiden, The Netherlands.
authors: G
authors: G
authors: Santen
authors: E
authors: E
authors: van Zwet
authors: M
authors: M
authors: Danhof
authors: O
authors: O
authors: Della Pasqua
mesh_terms: D000928:Antidepressive Agents / Q000627:therapeutic use*; D002986:Clinical Trials as Topic / Q000379:methods* / Q000706:statistics & numerical data; D003198:Computer Simulation; D003627:Data Interpretation, Statistical; D003866:Depressive Disorder / Q000188:drug therapy* / Q000523:psychology; D006801:Humans; D008962:Models, Theoretical; D010352:Patient Dropouts; D011237:Predictive Value of Tests; D011569:Psychiatric Status Rating Scales
chemical_list: D000928:Antidepressive Agents