I don’t know the meaning of ‘minDaysAtRisk’.
This argument is used in ‘createStudyPopulation’ function.
I consulted the manual but I still don’t know.
Is this the argument that limits the period between outcome start date and end date?
Thank you.
Subjects having less than minDaysAtRisk are removed.
You can use the other argument to specify the start and end of the time-at-risk (typically relative to the cohort start and end date). Some people may have more time-at-risk than others. Using minDayAtRisk you could for example limit the analysis to only those that are at least 365 days at risk.
Note that this is a tricky parameter to play with, because you are using information post-index to define who is included in your study. It may very well be that the people that are longer at risk are those that tolerate the treatment well, and don’t drop out for other reasons such as death. This could lead to bias.
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I am trying to use predictplp function for predicting outcomes in a target population. In order to do that, I need to make a study population without specifying an outcome cohort. Is it possible to do so using createstudypopulation function? R throws an error if I do not specify the outcome cohort in createstudypopulation function.