What is an acceptable non-inferiority margin?
What is an acceptable non-inferiority margin?
In order to demonstrate non-inferiority, the recommended approach is to pre-specify a margin of non- inferiority in the protocol. After study completion, a two-sided 95% confidence interval (or one-sided 97.5% interval) for the true difference between the two agents will be constructed.
How do you prove non-inferiority?
Non-inferiority can be shown if the difference between two treatments does not cross a predefined inferiority margin. Non-inferiority studies need to be carefully planned; failings in the design of the study may make accepting an inferior treatment more likely.
Can you determine superiority from a non-inferiority trial?
In a non-inferiority trial, the focus is on the lower bound margin, what happens at the upper end is not of primary concern in this type of trial design. One can also declare superiority in a non-inferiority trial if the lower limit of CI of the new treatment is above the non-inferiority margin and above zero.
What is a non-inferiority p value?
In non-inferiority trials, investigators are interested in whether new treatment is non-inferior to standard treatment. Only the non-inferior margin to the right side of unity on the forest plot is specified. Therefore, the significance level is usually set as a one-sided p value of 0.025.
What is meant by non-inferiority?
A study that tests whether a new treatment is not worse than an active treatment it is being compared to. Non-inferiority trials are sometimes done when a placebo (an inactive treatment) cannot be used.
What is the difference between a non-inferiority trial and a superiority trial?
In comparison studies with a current therapy, non-inferiority is used to demonstrate that the new therapy provides at least the same benefit to the patient. Superiority trials are always used when comparisons are made to placebo or vehicle treatments.
What is the meaning of non-inferiority?
What phase is a non-inferiority trial?
phase IV
Non-inferiority (NI) trials in drug research are used to demonstrate that a new treatment is not less effective than an active comparator. Since phase IV trials typically aim at informing a clinical decision, the value of a phase IV non-inferiority trial hinges also on its clinical relevance.
What does a non-inferiority margin mean?
By definition, a non-inferiority trial aims to demonstrate that the test product is not worse than the comparator by more than a small pre-specified amount. This amount is known as the non-inferiority margin, or delta.
What is a non-inferiority analysis?
What is meant by non-inferiority trial?
What is non-inferiority or superiority of something?
A non-inferiority trial is to show that treatment A is not worse than the treatment B. Unlike the superiority trial, we don’t need the treatment to be better than the control. For example, if δ > 0, the treatment may be ‘worse’ than the control (i.e. µ1 – µ0 < 0).
Do you need FDA guidance for non inferiority trials?
The guidance does not provide recommendations for how to evaluate the safety of a drug using a non-inferiority trial design. This article provides background on a non-inferiority trial design along with assumptions and advantages and disadvantages of the trial design.
How is a non inferiority margin determined in a clinical trial?
The difference tested during analyses is C – T. The test drug (T) is inferior to the active control (C) by some margin (M) or more (C – T >= M). Selecting a non-inferiority margin in a trial is challenging but also critical to a successful trial.
What are the benefits of non inferiority trials?
Benefits of non-inferiority trials 1 A non-inferiority trial is useful when a placebo controlled trial is not appropriate. 2 A non-inferiority trial may also test for superiority without concern about inflating the Type I error rate with care… More
When to use a non inferiority clinical design?
The presence of constancy is important to evaluate. For example, if a disease definition has changed over time or the methodology used in the historical trial is outdated the constancy assumption may be violated and the use of a non-inferiority design may not be appropriate.