Point estimation in adaptive enrichment designs
Adaptive enrichment designs are an attractive option for clinical trials that aim at demonstrating efficacy of therapies, which may show different benefit for the full patient population and a prespecified subgroup. In these designs, based on interim data, either the subgroup or the full population...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
10 November 2017
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| In: |
Statistics in medicine
Year: 2017, Volume: 36, Issue: 25, Pages: 3935-3947 |
| ISSN: | 1097-0258 |
| DOI: | 10.1002/sim.7412 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1002/sim.7412 Verlag, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/sim.7412 
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| Author Notes: | Kevin Kunzmann, Laura Benner, Meinhard Kieser |
MARC
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| 520 | |a Adaptive enrichment designs are an attractive option for clinical trials that aim at demonstrating efficacy of therapies, which may show different benefit for the full patient population and a prespecified subgroup. In these designs, based on interim data, either the subgroup or the full population is selected for further exploration. When selection is based on efficacy data, this introduces bias to the commonly used maximum likelihood estimator. For the situation of two-stage designs with a single prespecified subgroup, we present six alternative estimators and investigate their performance in a simulation study. The most consistent reduction of bias over the range of scenarios considered was achieved by a method combining the uniformly minimum variance conditionally unbiased estimator with a conditional moment estimator. Application of the methods is illustrated by a clinical trial example. | ||
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