Bioequivalence and Bioavailability Forum • New paper (method D for PE 0.90)

New paper (method D for PE 0.90) [Two-Stage / GS Designs]

posted by ElMaestro – Denmark, 2011-04-19 16:49 (5178 d 03:19 ago) – Posting: # 6922
Views: 26,278

Dear d_labes,

❝ What makes me also wondering is that the alpha "inflation" is shifted to higher stage 1 number of subjects if the variability increases. This is somehow counter-intuitive to me. Small is beautiful?

Try and plot type I error rate as function of CV for different levels of N1 under a fixed T/R (0.9 is a good choice). I bet ten belgian drachmers that you will be surprised...

Dear HS,

❝ There’s no stopping criterion in Potvin’s method. My protocols stated clearly that there is none in the method and were approved by the BfArM and two IECs. Experiences?

Potvin's method B/C/D contain a stopping criterion. This is when you after stage 1 realise it's game over.

—
Pass or fail!
ElMaestro

Complete thread:

Potvin method B subtleties d_labes 2011-01-31 14:24 [Two-Stage / GS Designs]
- Potvin method B subtleties jdetlor 2011-02-01 17:17
  - Potvin method B subtleties d_labes 2011-02-02 09:15
    - Potvin method B subtleties jdetlor 2011-02-02 16:08
      - Gould d_labes 2011-02-02 16:25
        
        Gould jdetlor 2011-02-02 17:02
- Another one ... d_labes 2011-02-07 14:32
  - Oops! Helmut 2011-02-07 15:24
    - Oops! d_labes 2011-02-07 16:29
      - Oops! Helmut 2011-02-07 16:47
        
        Oops! ElMaestro 2011-02-07 17:06
        
        Oops! Helmut 2011-02-07 17:17
        
        Oops! ElMaestro 2011-02-07 18:35
        
        Simul'ants in my pants d_labes 2011-02-08 09:07
        
        Need for speed... ElMaestro 2011-02-13 10:57
        
        Need for speed... d_labes 2011-02-15 14:06
        
        Need for speed... ElMaestro 2011-02-15 17:39
        
        Pocock alpha's d_labes 2011-02-16 09:18
        
        ElMaestro's brain ElMaestro 2011-02-16 09:32
        
        ElMaestro's brain d_labes 2011-02-16 10:05
        
        ElMaestro's brain ElMaestro 2011-02-16 12:07
        
        Numbers d_labes 2011-02-16 13:45
- Bonus counter-question ElMaestro 2011-02-07 23:44
  - Speed is the question d_labes 2011-02-08 08:36
- New paper (method D for PE 0.90) Helmut 2011-04-18 12:58
  - New paper (method D for PE 0.90) d_labes 2011-04-19 08:58
    - New paper (method D for PE 0.90) Helmut 2011-04-19 14:30
    - New paper (method D for PE 0.90)ElMaestro 2011-04-19 14:49
      - Stopping criterion # futility rule Helmut 2011-04-19 15:28