A Direct Approach to Simultaneous Tests of Superiority and Noninferiority with Multiple Endpoints
多终点优效性与非劣效性同时检验的直接方法AI 解读 ↓
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多终点优效性与非劣效性同时检验的直接方法AI 解读 ↓
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Simultaneous tests of superiority and non-inferiority hypotheses on multiple endpoints are often performed in clinical trials to demonstrate that a new treatment is superior over a control on at least one endpoint and non-inferior on the remaining endpoints. Existing methods tackle this problem by testing the superiority and non-inferiority hypotheses separately and control the Type I error rate each at $α$ level. In this paper we propose a unified approach to testing the superiority and non-inferiority hypotheses simultaneously. The proposed approach is based on the UI-IU test and the least favorable configurations of the combined superiority and non-inferiority hypotheses, which leads to the solution of an adjusted significance level $α'$ for marginal tests that controls the overall Type I error rate at pre-defined $α$. Simulations show that the proposed approach maintains a higher power than existing methods in the settings under investigation. Since the adjusted significance level $α'$ is obtained by controlling the Type I error rate at $α$, one can easily construct the exact $(1 - α)\%$ simultaneous confidence intervals for treatment effects on all endpoints. The proposed approach is illustrated with two real examples.