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3,339 items of data are available, covering 3,339 participants. Some values have special meanings defined by Data-Coding 819.
There are 2704 distinct values.
Mean = 2004-04-20
18 items below graph minimum of 1963-01-06
2 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)
Date of the first occurrence of any code mapped to 3-character ICD10 K61. The code corresponds to "abscess of anal and rectal regions". Note that events which were apparently before birth were omitted when constructing this data field.