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1,361 items of data are available, covering 1,361 participants. Some values have special meanings defined by Data-Coding 819.
There are 1222 distinct values.
Mean = 2015-02-19
2 items below graph minimum of 1989-04-22
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)
Date of the first occurrence of any code mapped to 3-character ICD10 G91. The code corresponds to "hydrocephalus". Note that events which were apparently before birth were omitted when constructing this data field.