Bioequivalence and Bioavailability Forum

Setup in Phoenix/WinNonlin [Study Assessment]

posted by Helmut – Vienna, Austria, 2016-05-15 16:47 (2570 d 04:12 ago) – Posting: # 16305
Views: 29,782

Hi Angus,

❝ My apologies it is a typo it is 95% not 98%.

Whew! Confused me. ;-)

❝ I am happy with the Phoenix WinNonlin calculations for within subject and between subject variance. The reason for my interest is the other worker following Smith's method is producing values, which are much lower than my Phoenix values for within subject variance. It seems to me that the values from the two methods should be much the same?

Variances should be similar. Smith’s data don’t help because the information is incomplete (cross-over or paired, sequences, periods?). Here one of my studies (6×3 Williams’ design):

                      dose-norm.       power-model       

                          BE       w = 1   w = 1/ln(dose)

Var(sequence*subject)  0.1593     0.1645      0.1595     

Var(Residual)          0.02284    0.02330     0.007113

❝ I do see that LnCmax cannot be both the dependent and the regressor (I think LnDose is the regressor).

Exactly. I uploaded a project-file at Certara’s forum. Compare it to your setup.

❝ I have tried to run the linear mixed effects model, but I cannot repeat your results. The program ran, but my residual variance was 0.154. I am thinking that maybe my input file does not have the structure needed, e.g. subject 4,5,6 in the Smith Data were treated at 50mg and 250mg so do you need to differentiate by including a period 1 and period 2 variable in the input file?

I have no clue how the subjects were treated… Maybe it was a dose escalation?

      period  

    1   2   3 

1  25         

2  25         

4      50  250

5      50  250

6      50  250

7      75  250

8      75  250

9      75  250

—
Dif-tor heh smusma 🖖🏼 Довге життя Україна!
Helmut Schütz

The quality of responses received is directly proportional to the quality of the question asked. 🚮
Science Quotes

Complete thread:

Dose Proportionality and Variance AngusMcLean 2016-05-11 16:55 [Study Assessment]
- More information, please Helmut 2016-05-12 14:34
  - More information, please AngusMcLean 2016-05-13 16:40
    - Setup in Phoenix/WinNonlin Helmut 2016-05-14 02:26
      - Setup in Phoenix/WinNonlin AngusMcLean 2016-05-14 18:54
        
        Setup in Phoenix/WinNonlinHelmut 2016-05-15 14:47
        
        Setup in Phoenix/WinNonlin AngusMcLean 2016-05-15 15:17
        
        Phoenix 64 Warning Helmut 2016-05-15 15:56
        
        Phoenix 64 Warning AngusMcLean 2016-05-15 20:11
        
        OT: imperial vs. metric units Helmut 2016-05-16 16:26
        
        Setup in Phoenix/WinNonlin ElMaestro 2016-05-15 20:54
        
        Setup in Phoenix/WinNonlin AngusMcLean 2016-05-15 22:30
      - Setup in Phoenix/WinNonlin AngusMcLean 2016-05-16 21:00
        
        NCSS vs. PHX/WNL vs. SAS Helmut 2016-05-17 01:50
        
        NCSS vs. PHX/WNL vs. SAS - Validation? mittyri 2016-05-18 08:23
        
        Diagnostics ElMaestro 2016-05-18 09:20
        
        Diagnostics: R and Phoenix Helmut 2016-05-18 15:14
        
        Diagnostics: R zizou 2016-05-22 19:07
        
        Diagnostics: R Helmut 2016-05-23 01:22
        
        SASian potpourri d_labes 2016-05-24 12:02
        
        Compilation Helmut 2016-05-24 14:27
        
        REML or not d_labes 2016-05-24 16:33
        
        complete or not Helmut 2016-05-24 16:57
        
        Compilation AngusMcLean 2016-05-26 16:46
        
        doubts about NCSS Helmut 2016-05-26 19:13
        
        Doubts about NCSS zizou 2016-05-26 23:38
        
        Compilation AngusMcLean 2016-05-28 00:51
        
        Kenward-Roger? Helmut 2016-05-28 15:59
        
        90% confidence interval for R_dnm Shuanghe 2019-01-04 17:45
        
        90% confidence interval for R_dnm d_labes 2019-01-05 14:01
        
        Visualizing lmer and limits mittyri 2019-01-06 17:00
        
        Visualizing lmer and limits Shuanghe 2019-01-07 11:05
        Visualizing lmer and limits d_labes 2019-01-07 15:08
        
        Visualizing lmer and limits mittyri 2019-01-13 23:53
        
        90% confidence interval for R_dnm Shuanghe 2019-01-07 10:53
        
        90% confidence interval for R_dnm d_labes 2019-01-07 15:17
        
        90% confidence interval for R_dnm Shuanghe 2019-01-07 17:11
        
        90% confidence interval for R_dnm d_labes 2019-01-07 18:24
        offtop: greek letters and tables mittyri 2019-01-08 00:19
        
        OT: greek letters and symbols Helmut 2019-02-02 16:04
        
        Smith’s paper Helmut 2016-05-18 14:44
        
        Smith’s paper d_labes 2019-01-05 15:00

Setup in Phoenix/WinNonlin [Study As­sess­ment]

Complete thread:

Setup in Phoenix/WinNonlin [Study Assessment]