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Ever had abnormal blood stool test (unspecified type)

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For persons over age 40 who have heard of blood stool tests, BSTEVAB reports whether the person ever had an abnormal blood stool test (unspecified type).

A blood stool test may also be known as a hemocult.

The 1987 Fields Representative's Manual noted not to ask follow-up question for non-normal blood stool tests that were self-administered, as follow-up questions were intended for medically diagnosed results.


There are no comparability issues with this variable.


  • 1987: Half of sample persons age 40+ (excluded from CAEP supplement) who have heard of blood stool test and have had test.


  • 1987