Let's say that we have 2 years worth of follow ups for a patient, and their vital status is "Alive"
(a) Is it correct to say that beyond 2 years we do not know if they are alive/dead?
(b) Or does
vital_status=Alive mean that we just don't have formal follow up data for them after 2 years?
From the GDC Data Dictionary:
|The survival state of the person registered on the protocol.
|Enumeration: (Alive, Dead, Unknown, Not Reported)
|Time interval from the date of last follow up to the date of initial pathologic diagnosis, represented as a calculated number of days.
|One of: (number, null)