Bioequivalence and Bioavailability Forum • All effects fixed

All effects fixed [Two-Stage / GS Designs]

posted by Helmut – Vienna, Austria, 2013-12-06 16:31 (4217 d 06:47 ago) – Posting: # 12016
Views: 25,464

Hi Kumar,

sorry, I forgot: For EMA (only!) use an all-fixed effects model (according to the BE GL Section 4.1.8).
For future studies: If you proceed to the second stage, add the term sequence(stage) to the model. Required since EMA’s Q&A Rev.7 (Feb 2013). Since this is not a within-subject term, CV, power, and the CI – as expected – are not affected.* Why EMA’s Biostatistical Working Party introduced it is beyond my intellectual reach.

Karalis V, Macheras P. On the Statistical Model of the Two-Stage Designs in Bioequivalence Assessment. J Pharm Pharmacol. (Epub ahead of print 31 Oct 2013). doi 10.1111/jphp.12164

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Complete thread:

Acceptance by FDA/CDER Mahesh 2013-08-06 06:12
- Two stage BE design ElMaestro 2013-08-06 10:05
- Two stage BE design Helmut 2013-08-06 15:31
  - Two stage BE design Mahesh 2013-08-07 06:51
    - Two stage BE design kumarnaidu 2013-10-17 15:08
      - Two stage BE design ElMaestro 2013-10-17 17:28
        
        Two stage BE design kumarnaidu 2013-10-18 05:59
        
        EMA vs. rest of the world Helmut 2013-10-18 14:42
        
        Two stage BE design — cold water thrown on our head Shuanghe 2013-10-18 10:05
        
        Open your mouth and forcefully spit the water out Helmut 2013-10-18 13:29
        
        Change in statistical design kumarnaidu 2013-10-19 07:52
        
        Bad idea Helmut 2013-10-19 15:04
        
        Bad idea kumarnaidu 2013-10-21 06:01
        
        Change to Method B? Helmut 2013-10-21 14:51
        
        Change to Method B? kumarnaidu 2013-10-22 06:15
        
        Simulations Helmut 2013-10-22 13:20
        
        Open your mouth and forcefully spit the water out Shuanghe 2013-10-22 09:03
        
        Reach for the stars Helmut 2013-10-22 13:05
        
        Alpha inflation in two stage design kumarnaidu 2013-12-04 13:43
        
        Deficiency letters Helmut 2013-12-04 14:50
        
        Deficiency letters kumarnaidu 2013-12-05 06:18
        
        Simulations Helmut 2013-12-05 15:51
        
        Simulations kumarnaidu 2013-12-05 16:07
        
        Simulations Helmut 2013-12-05 16:55
        
        Simulations kumarnaidu 2013-12-06 06:07
        
        Ejaculatio praecox Helmut 2013-12-06 14:30
        
        Ejaculatio praecox kumarnaidu 2013-12-06 15:13
        
        All effects fixedHelmut 2013-12-06 15:31
        
        All effects fixed kumarnaidu 2013-12-09 07:33
        
        EMA… Helmut 2013-12-09 12:45