IS THE SIMPLE CARRY-OVER MODEL USEFUL
IS THE SIMPLE CARRY-OVER MODEL USEFUL
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DOI：
10.1002/sim.4780110603
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发表时间：
1992-04-01
影响因子：
2
通讯作者：
SENN, SJ
中科院分区：
文献类型：
--
作者：
SENN, SJ
It is argued that the models usually employed for carry-over effects in cross-over trials are not reasonable. The example of a non-linear dose response for a dose-finding trial arranged in a Williams square is developed to show that if carry-over is present to any appreciable degree the usual statistical models provide no guaranteed protection against its effects. It is concluded that the most reasonably defended assumption about carry-over effects is that no important carry-over has taken place and that, where this assumption cannot be defended, statistical models provide no satisfactory substitute for it.
