Details

Autor(en) / Beteiligte

• Moser, Barry K.
• Tebbs, Joshua M.

Titel

A New Interim Monitoring Statistic for Group Sequential Clinical Trials

Ist Teil von

• Communications in statistics. Theory and methods, 2005-01, Vol.33 (1), p.153-164

Ort / Verlag

Philadelphia, PA: Taylor & Francis Group

Erscheinungsjahr

2005

Quelle

Taylor & Francis Journals Auto-Holdings Collection

Beschreibungen/Notizen

• Randomized clinical trials are often performed to determine the efficacy of new drug treatments. In recent years, there has been an interest to use group sequential methods in such trials to allow for the possibility of early stopping when there is clear evidence of an established benefit. The purpose of this paper is to develop a new statistic for monitoring the significance of observed results in a K-stage group sequential test. When K is fixed in advance, the statistic can be used with sequential data collected at equal interim stage sample sizes. When K is not fixed, but the information fractions of the past and present analysis stages are known, the statistic can be formulated through the α-spending function for any family of testing procedures.