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19,846 items of data are available, covering 19,846 participants. Some values have special meanings defined by Data-Coding 819.
There are 6108 distinct values.
Mean = 2012-09-27
414 items below graph minimum of 1988-05-05
3 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 20 May 2022.
Date of the first occurrence of any code mapped to 3-character ICD10 K31. The code corresponds to "other diseases of stomach and duodenum". Note that events which were apparently before birth were omitted when constructing this data field.