ACRP-CP Exam Flashcards
(426 cards)
Specific procedural steps to ensure that statistical principles are implemented properly are the responsibility of
the sponsor/experienced statistician
clinical trials conducted in the later phases of development are
confirmatory trials of efficacy
In addition to efficacy, confirmatory trials may have as their primary variable:
a safety variable (e.g. an adverse event, a clinical laboratory variable or an electrocardiographic measure) OR a pharmacodynamic or a pharmacokinetic variable (as in a confirmatory bioequivalence trial)
early phases of drug development consist mainly of clinical trials that are
exploratory in nature
The systematic tendency of any factors associated with the design, conduct, analysis and evaluation of the results of a clinical trial to make the estimate of a treatment effect deviate from its true value
Bias
Bias introduced through deviations in conduct is referred to as
Operational bias
Statistical bias examples include
Trial design, during conduct or analysis of the trial
sensitivity of the overall conclusions to various limitations of the data, assumptions, and analytic approaches to data analysis. ________ implies that the treatment effect and primary conclusions of the trial are not substantially affected when analyses are carried out based on alternative assumptions or analytic approaches
Robustness
Statistical methods, such as significance tests and confidence intervals, which can be interpreted in terms of the frequency of certain outcomes occurring in hypothetical repeated realisations of the same experimental situation
Frequentist Method
Approaches to data analysis that provide a posterior probability distribution for some parameter (e.g. treatment effect), derived from the observed data and a prior probability distribution for the parameter. The posterior distribution is then used as the basis for statistical inference.
Bayesian Approaches
The broad aim of the process of clinical development of a new drug is to find out whether there is a __________ at which the drug can be shown to be simultaneously safe and effective, to the extent that the risk-benefit relationship is acceptable.
dose range and schedule
Interpretation and assessment of the evidence from the total __________ of trials involves synthesis of the evidence from the individual trials
programme
The formal evaluation of the quantitative evidence from two or more trials bearing on the same question. This most commonly involves the statistical combination of summary statistics from the various trials, but the term is sometimes also used to refer to the combination of the raw data.
Meta-Analysis
A _______ trial is an adequately controlled trial in which the hypotheses are stated in advance and evaluated. As a rule, ________ trials are necessary to provide firm evidence of efficacy or safety. In such trials the key hypothesis of interest follows directly from the trial’s primary objective, is always pre-defined, and is the hypothesis that is subsequently tested when the trial is complete.
Confirmatory trial
The extent to which the findings of a clinical trial can be reliably extrapolated from the subjects who participated in the trial to a broader patient population and a broader range of clinical settings.
Generalisability, Generalisation
The results of the confirmatory trial(s) should be _______. In some circumstances the weight of evidence from a single confirmatory trial may be sufficient.
Robust
The rationale and design of confirmatory trials nearly always rests on earlier clinical work carried out in a series of __________ studies. Such trials cannot be the basis of the formal proof of efficacy, although they may contribute to the total body of relevant evidence.
Exploratory
The _____________ should be the variable capable of providing the most clinically relevant and convincing evidence directly related to the primary objective of the trial. There should generally be only one ______________.
Primary variable
Primary variables could be:
Efficacy, safety and tolerability, quality of life, and health economics
_____________ are either supportive measurements related to the primary objective or measurements of effects related to the secondary objectives.
Secondary variables
If a single primary variable cannot be selected from multiple measurements associated with the primary objective, another useful strategy is to integrate or combine the multiple measurements into a single or __________ variable, using a pre- defined algorithm
composite
The extent to which a variable (e.g. a rating scale) measures what it is supposed to measure.
Content validity
The property of yielding equivalent results when used by different raters on different occasions.
Inter-Rater Reliability
The property of yielding equivalent results when used by the same rater on different occasions.
Intra-Rater Reliability