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58,679 items of data are available, covering 20,301 participants. Array indices run from 0 to 46.
There are 5449 distinct values.
Mean = 1989-06-02
Counts of participants/items last updated 13 Apr 2019.
This field provides for each participant the date each ICD 9 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 ICD9 diagnosis codes can be found in data-field Field 41203 and they can be linked using the array structure.
Please note ICD9 coded hospital data are only available for older Scottish hospital records.