Supremum weighted log-rank test and sample size for comparing two-stage adaptive treatment strategies
比较两阶段自适应治疗策略的上确界加权对数秩检验与样本量AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要直接比较两阶段随机试验中的治疗策略效果,并为该比较设计检验和样本量。
反馈分类问题比较两阶段自适应治疗策略的上确界加权对数秩检验与样本量AI 解读 ↓
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In two-stage adaptive treatment strategies, patients receive an induction treatment followed by a maintenance therapy, given that the patient responded to the induction treatment they received. To test for a difference in the effects of different induction and maintenance treatment combinations, a modified supremum weighted log-rank test is proposed. The test is applied to a dataset from a two-stage randomized trial and the results are compared to those obtained using a standard weighted log-rank test. A sample-size formula is proposed based on the limiting distribution of the supremum weighted log-rank statistic. The sample-size formula reduces to Eng and Kosorok's sample-size formula for a two-sample supremum log-rank test when there is no second randomization. Monte Carlo studies show that the proposed test provides sample sizes that are close to those obtained by standard weighted log-rank test under a proportional hazards alternative. However, the proposed test is more powerful than the standard weighted log-rank test under non-proportional hazards alternatives.