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42,817 items of data are available, covering 20,298 participants. Array indices run from 0 to 27.
There are 5435 distinct values.
Mean = 1989-04-14
This field provides, for each participant, the date each ICD-9 diagnosis code was first recorded in the primary/main position in the participant's hospital inpatient records (in the field DIAG_ICD9 in the HESIN_DIAG table).
The date given is the episode start date (the EPISTART field on the HESIN table), or if this was missing the admission date (the ADMIDATE field on the HESIN table). See the Inpatient data Dictionary (Resource 141140) in Category 2000 for information about the HESIN and HESIN_DIAG tables.
The corresponding ICD-9 diagnosis codes can be found in data-field Field 41203 and the two fields can be linked using the array structure. Please note ICD-9 coded hospital inpatient data are only available for older Scottish hospital records.