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12,850 items of data are available, covering 12,850 participants. Some values have special meanings defined by Data-Coding 819.
There are 5963 distinct values.
Mean = 2005-09-23
193 items below graph minimum of 1975-05-10
1 items have value 1903-03-03 (Code has event date after participant's date of birth and falls in the same calendar year as date of birth)
Counts of participants/items last updated 30 Oct 2020.
Date of the first occurrence of any code mapped to 3-character ICD10 H00. The code corresponds to "hordeolum and chalazion". Note that events which were apparently before birth were omitted when constructing this data field.