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65,932 items of data are available, covering 65,932 participants. Some values have special meanings defined by Data-Coding 819.
There are 10601 distinct values.
Mean = 2008-11-17
187 items below graph minimum of 1981-06-08
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 J22. The code corresponds to "unspecified acute lower respiratory infection". Note that events which were apparently before birth were omitted when constructing this data field.