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RegisterWhich GMR to plug in [Two-Stage / GS Designs]
Hi BE-proff,
Errr.... what????
Come again, what does this mean?
What is a futility design, futility study, how are they alternatives?
I meant to say that plugging in the observed GMR has a bunch of drawbacks, which often are plain showstoppers. The sample size explosion can be fixed by futility caps on sample size, and that of course keeps the sample size (and cost) down, but then power may be so low that the trial makes no sense and is nothing more than unethical exposure.
2-stage trials work well then you are absolutely sure about the match and only unsure about the variability.
❝ I suppose you are talking about futility studies as a alternative for adaptive designs.
Errr.... what????
❝ Why are futility designs more popular if risks are similar? 
Come again, what does this mean?
What is a futility design, futility study, how are they alternatives?
I meant to say that plugging in the observed GMR has a bunch of drawbacks, which often are plain showstoppers. The sample size explosion can be fixed by futility caps on sample size, and that of course keeps the sample size (and cost) down, but then power may be so low that the trial makes no sense and is nothing more than unethical exposure.
2-stage trials work well then you are absolutely sure about the match and only unsure about the variability.
—
Pass or fail!
ElMaestro
Pass or fail!
ElMaestro
Complete thread:
- Data for 2nd stage of Potvin’s designs BE-proff 2017-02-18 06:40 [Two-Stage / GS Designs]
![[Mix]](https://static.bebac.at/img/mix.png "open in Mix view")
- Data for 2nd stage of Potvin’s designs ElMaestro 2017-02-18 10:20
- Data for 2nd stage of Potvin’s designs BE-proff 2017-02-18 13:29
- GMR = fixed! Helmut 2017-02-18 16:23
- Data for 2nd stage of Potvin’s designs BE-proff 2017-02-18 13:29
- “Type 1” slightly higher power than “Type 2” for the same adj. α Helmut 2017-02-18 11:51
- “Type 1” slightly higher power than “Type 2” for the same adj. α BE-proff 2017-02-18 13:31
- Terminology Helmut 2017-02-18 16:27
- Terminology Yura 2017-02-20 11:28
- Which GMR to plug in ElMaestro 2017-02-20 11:46
- Which GMR to plug in BE-proff 2017-02-21 11:35
- Which GMR to plug inElMaestro 2017-02-21 11:47
- Which GMR to plug in BE-proff 2017-02-21 11:35
- Validated frameworks; observed GMR not relevant Helmut 2017-02-22 12:03
- Validated frameworks; observed GMR not relevant Silva 2017-03-09 01:26
- GMR, theta 0 and that all d_labes 2017-03-09 09:21
- GMR, theta 0 and that all Silva 2017-03-09 12:38
- GMR, theta 0 and that all ElMaestro 2017-03-09 12:56
- GMR, theta0 and that all d_labes 2017-03-09 13:55
- GMR, theta0 and that all Silva 2017-03-09 18:01
- GMR, theta 0 and that all Silva 2017-03-09 12:38
- GMR, theta 0 and that all d_labes 2017-03-09 09:21
- Validated frameworks; observed GMR not relevant Silva 2017-03-09 01:26
- Which GMR to plug in ElMaestro 2017-02-20 11:46
- Terminology Yura 2017-02-20 11:28
- Terminology Helmut 2017-02-18 16:27
- “Type 1” slightly higher power than “Type 2” for the same adj. α BE-proff 2017-02-21 11:31
- “Type 1” slightly higher power than “Type 2” for the same adj. α BE-proff 2017-02-18 13:31
- Data for 2nd stage of Potvin’s designs ElMaestro 2017-02-18 10:20
Ing. Helmut Schütz