B²-FIC calibrates Bayesian phase-II borrowing for type I error, then uses IA1 predictive probability to schedule the earliest admissible IA2, yielding earlier decisions than fixed GSD when evidence is favorable while holding empirical FWER near 0.025.
Bayesian dynamic borrowing in group-sequential design for medical device studies.BMC Medical Research Methodology.2025;25(1):78
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A Bayesian predictive framework for adaptive interim-analysis timing with robust borrowing in confirmatory trials
B²-FIC calibrates Bayesian phase-II borrowing for type I error, then uses IA1 predictive probability to schedule the earliest admissible IA2, yielding earlier decisions than fixed GSD when evidence is favorable while holding empirical FWER near 0.025.