Hi Camila

If you don't have a lag time, use the following:
$PK
IF(NEWIND.LT.2) THEN
IFL=0
TAD=0.0
ENDIF
IF(EVID.EQ.1.OR.EVID.EQ.4)DTIME=TIME
 IF(DOSTIM.NE.0.)DTIME=DOSTIM ; non-event dose times

TAD=TIME-DTIME

If you have a lag time, use:
IF(NEWIND.LT.2) THEN
TAD=0.0
DTIME=1.0E+06
ENDIF

IF(DOSTIM>0.0) DTIME=DOSTIM -ALAG1               ; dostim is non-zero on 
additional doses (ADDL/II), no delay in doses
IF(AMT>0.AND.DOSTIM==0.0) DTIME=TIME          ; for all dose events scheduled 
explcitly in the data record, no delay
TAD=TIME-DTIME

I hope this helps

Maria


Maria Pitsiu ICON Plc PK M&S 7122 3652 (internal) +44 162 849 3652 (external)

From: owner-nmus...@globomaxnm.com [mailto:owner-nmus...@globomaxnm.com] On 
Behalf Of de Almeida, Camila
Sent: 20 December 2016 13:46
To: nmusers@globomaxnm.com
Subject: [NMusers] Generating TAD with ADDL dosing format

Hello,

I was wondering if I could get some guidance from this great group. My issue is 
primarily with some diagnostic analysis, but this is taking me back to an old 
NONMEM problem.

My aim is to run a VPC on a model I implemented, and if possible change the idv 
to TAD instead of TIME. The reason for that is the VPC graph based on TIME 
looks dreadful as the data is sparse and from different studies of different 
lengths.

I'm having issues generating the TAD output column from my NONMEM run. I 
naively assumed I could easily do that, but looking at the NONMEM archives it 
seems this gets tricky when your dosing events are written using ADDL. Has 
anyone ever managed to find a solution for this? And if not, is there an 
alternative way to run the VCP on TAD, do we really need to get this column 
from NONMEM's output?

Thanks all,

Camila de Almeida, PhD
PKPD Scientist,
Modelling & Simulation, IMED Oncology DMPK
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AstraZeneca UK Limited
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