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Use a calculated variable to return the count of days between the baseline date and the date of an event of interest.
How To
Note: Survival analyses require two variables: 1) whether or not it is a "Censored" event, and 2) the length of time to the event of interest.
Censored Event:
Select the event date (e.g., death) and use the following function:
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return 0;
}
return 1;
}
Length of Time to Event:
Select the event date (e.g., death), baseline date and the last available encounter date (all encounter dates are needed, unless using an "Output Interval" containing the baseline and last follow-up).
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