Hardstopping rule based on the Bin-Beta distribution and not on the results from the model.The rule is triggered when the first dose is considered to be toxic (above threshold prob) based on the observed data and a Beta prior distribution. For calculation the posterior bin-beta distribution, usually an uninformative Beta(1,1) prior is used.
target
the target toxicity
prob
the threshold probability
prior.a
the first parameter of the prior Beta distribution
prior.b
the second parameter of the prior Beta distribution
label
label of stopping rule
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