when to set time to an event when does time at risk start when should i set time at risk how early can you exclude patients with events from medication plan how long does a change in time to events last when do you start to exclude changes can you exclude events 0 months after a disease when should time to risk be set to 3 months when do time to events begin when should time to events be excluded what is the origin of time at risk on a cox hazard study when to set origin points how long does it take to exclude an event in cox t hazard model time at risk setting when is the best time to exclude a variable? what is duration of medication plans after event when are you best to set the origin point in cox-propotional hazard model change analysis when to exclude time at risk what is the origin point of the hazard model when is best to set the origin point in cox