Bioequivalence and Bioavailability Forum

Concerta Guidance: Sub x Form interaction variance test [Regulatives / Guidelines]

posted by jag009 – NJ, 2014-12-07 21:58 (3421 d 10:59 ago) – Posting: # 14005
Views: 12,367
(edited by jag009 on 2014-12-07 22:10)

Hi folks,

❝ I’m thinking “yes”. IMHO it’s the difference of the between- and pooled within-subject variances. Even in 2×2 crossovers sometimes CV_intra > CV_inter...

I used the ema 4 way fully replicate dataset (Cmax) (I don't have the link now but I am sure you know what I am referring to) and tried it with my revised FDA RSABE SAS code. Briefly I obtained withsubject variances for T & R from dlats and the withinsubject variance for I from ilat (this might be my problem?). As per concerta guidance the sub*form interaction variance is,

Mi - 0.5* (Mt + Mr).

Using this formula my value was -0.074978. Can someone try this with SAS and let me know? Oh my withinsubject variances for T and R were 0.11654 and 0.19931. The withsubject variance for I was 0.08295 from ilat.

Update: I think I know what my potential problem is... I think I misinterpreted the withinsubject variance for I. For withinsubject variance T & R, is derived from estimate/2 in SAS, but for I its just the estimate?

Sorry I am typing from a tablet... ;-)

John

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Complete thread:

Concerta Guidance: Sub x Form interaction variance test jag009 2014-12-05 20:57 [Regulatives / Guidelines]
- Concerta Guidance: Sub x Form interaction variance test AngusMcLean 2014-12-06 01:28
  - Concerta Guidance: Sub x Form interaction variance test Helmut 2014-12-06 01:53
    - Concerta Guidance: Sub x Form interaction variance testjag009 2014-12-07 20:58
      - Concerta Guidance: S×F variance test AngusMcLean 2014-12-08 01:35
        
        Concerta Guidance: S×F variance test Helmut 2014-12-08 14:12
        
        Update: S×F variance test jag009 2014-12-08 17:40
        
        Update: S×F variance test AngusMcLean 2014-12-08 18:09
        
        EMA’s dataset I Helmut 2014-12-08 18:18
        
        EMA’s dataset I AngusMcLean 2014-12-08 19:55
        
        Update: S×F variance test jag009 2014-12-08 20:41
        
        Update: S×F variance test AngusMcLean 2014-12-08 18:18
        
        Question jag009 2014-12-10 17:01
        
        Question AngusMcLean 2014-12-10 18:34
        
        Update: S×F variance test kumarnaidu 2014-12-09 06:48
        
        Update: S×F variance test jag009 2014-12-09 15:16
        
        Update: S×F variance test AngusMcLean 2014-12-09 17:47
        
        Update: S×F variance test jag009 2014-12-09 18:01
        
        Update: S×F variance test AngusMcLean 2014-12-09 18:30
        
        Update: S×F variance test jag009 2014-12-18 15:31
        
        Update: S×F variance test AngusMcLean 2014-12-18 16:12
        
        Update: S×F variance test jag009 2014-12-22 17:28
        
        Update: S×F variance test AngusMcLean 2014-12-22 19:32
        
        Update: S×F variance test jag009 2014-12-22 20:19
        
        Update: S×F variance AngusMcLean 2014-12-22 20:45
        
        Update: S×F variance jag009 2014-12-22 20:51
        
        Update: S×F variance AngusMcLean 2014-12-22 21:10
        Update: S×F variance AngusMcLean 2014-12-22 21:36
        
        Update: S×F variance jag009 2014-12-22 22:18
        
        Update: S×F variance AngusMcLean 2014-12-22 23:26
        
        Update: S×F variance jag009 2014-12-23 04:43
        
        Update: S×F variance AngusMcLean 2014-12-23 15:24
        
        Update: S×F variance test AngusMcLean 2014-12-09 21:03
        
        Coding Helmut 2014-12-09 18:49
        
        working.... jag009 2014-12-09 22:24
- Concerta Guidance: S×F variance test ElMaestro 2014-12-06 11:12
  - Concerta Guidance: S×F variance test AngusMcLean 2014-12-07 14:32
    - Concerta Guidance: S×F variance test ElMaestro 2014-12-07 18:08
      - Concerta Guidance: S×F variance test AngusMcLean 2014-12-07 23:13
        
        Concerta Guidance: S×F variance test ElMaestro 2014-12-08 12:25
        
        Concerta Guidance: S×F variance test nobody 2014-12-08 13:44
        Concerta Guidance: S×F variance test AngusMcLean 2014-12-08 14:03
        
        Concerta Guidance:S×F variance test nobody 2014-12-08 14:32

Concerta Guidance: Sub x Form inter­action variance test [Regulatives / Guidelines]

Complete thread:

Concerta Guidance: Sub x Form interaction variance test [Regulatives / Guidelines]