Description
For sample persons over age 40 who have heard of a blood stool test, have had a test, but did not know the month and year of the last test (exact date), BSTLTP reports the time period (in days, weeks, months or years) since the last blood stool test (of an unspecified type).
Users should also see BSTLNO which reports the number of units since the last blood stool test.
