Dummy Date used as suggested during the call when the patient was transplanted pre-emptively and therefore was never on dialysis and therefore the “date of last dialysis”: 01/01/1950
Dummy variable for those data that are missing: 9999 or 99999
(if the boundaries set allow entering such a large number, where this is not possible the entry will be left blank e.g. last blood pressure where max limit is set to 200 mmHg and 9999 cannot be entered).
From Ina (email 28-03-2018@14:40):