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5,313 items of data are available, covering 5,313 participants. Some values have special meanings defined by Data-Coding 819.
There are 3726 distinct values.
Mean = 2012-09-04
21 items below graph minimum of 1981-03-18
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 M46. The code corresponds to "other inflammatory spondylopathies". Note that events which were apparently before birth were omitted when constructing this data field.