I am seeking help how to set up the data sheet and the modelcode if I have individual data for biomarker (timecourse) and time of death. I managed it with mean data, where I implemented the mean effect on Biomarker for each dose (variables fixed) as an Effect into the Hazard-statement (sequential modelling). When I want to do it jointly I have a problem with the time: there is one time-column for the biomarker-timecourse and one Time of Death, How to use the “event” statement here properly ?
Dear Newbie (is it your name?)
Anyway, here is how it should work.
1: You have only one time column to be used which is the time. In addition you have one column for your biomarker, one column for your event.
When an event occur, you put a 1 in the event column and at the row corresponding in the time column to the time of death.
When a biomarker level is observed, you fill the value in the biomarker column and at the row corresponding to the time at which the biomarker was observed.
If you have still issues, please send me the project and I will debug.
best Regards
Serge
Hello Serge, thanks for the speedy response ! I always used the event statement like this: event(flag, HAZ), where flag is 1 or 0 in the flag colum (censored data or not) and HAZ relates to the HAZ expression. Where can I than assign the event column ? Usually I assign time to the time of death column, and that works fine.