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1,725,736 items of data are available, covering 410,289 participants. Array indices run from 0 to 65.
There are 7997 distinct values.
Mean = 2008-10-05
Counts of participants/items last updated 13 Apr 2019.
This field provides for each participant the date each ICD 10 diagnosis code was first recorded as a primary diagnosis across all their episodes in hospital. The date provided in this field is the episode start date (Field 41083; epistart in the hesin table), or if this was missing the admission date (Field 41096; admidate in the hesin table). The corresponding primary ICD10 diagnosis codes can be found in Field 41202 and they can be linked using the array structure.