title: A quality by design approach for longitudinal quality attributes.
abstract: The concept of quality by design (QbD) as published in ICH-Q8 is currently one of the most recurrent topics in the pharmaceutical literature. This guideline recommends the use of information and prior knowledge gathered during pharmaceutical development studies to provide a scientific rationale for the manufacturing process of a product and provide guarantee of future quality. This poses several challenges from a statistical standpoint and requires a shift in paradigm from traditional statistical practices. First, to provide "assurance of quality" of future lots implies the need to make predictions regarding the quality given past evidence and data. Second, the quality attributes described in the Q8 guidelines are not always a set of unique, independent measurements. In many cases, these criteria are complicated longitudinal data with successive acceptance criteria over a defined period of time. A common example is a dissolution profile for a modified or extended-release solid dosage form that must fall within acceptance limits at several time points. A Bayesian approach for longitudinal data obtained in various conditions of a design of experiment is provided to elegantly address the ICH-Q8 recommendation to provide assurance of quality and derive a scientifically sound design space.
authors.affiliation: a Arlenda S.A. , Liège , Belgium.
authors.forename: Pierre
authors.initials: P
authors.lastname: Lebrun
authors.forename: Katherine
authors.initials: K
authors.lastname: Giacoletti
authors.forename: Tara
authors.initials: T
authors.lastname: Scherder
authors.forename: Eric
authors.initials: E
authors.lastname: Rozet
authors.forename: Bruno
authors.initials: B
authors.lastname: Boulanger
mesh_terms: D001499:Bayes Theorem; D001702:Biopharmaceutics / Q000592:standards / Q000706:statistics & numerical data*; D002626:Chemistry, Pharmaceutical; D003627:Data Interpretation, Statistical; D003692:Delayed-Action Preparations; D017408:Guidelines as Topic; D007700:Kinetics; D015233:Models, Statistical; D011786:Quality Control; D012995:Solubility; D013607:Tablets; D013678:Technology, Pharmaceutical / Q000379:methods / Q000592:standards / Q000706:statistics & numerical data*; D013997:Time Factors
chemical_list: D003692:Delayed-Action Preparations; D013607:Tablets
keywords: Bayesian modeling; Design space; Dissolution; Quality by design