Description
For sample persons over age 40 who have had a blood stool test, BSTLGYRE2
reports, in grouped years, the time since the last blood stool test (of an unspecified type).
Respondents were handed a card with the categories as follows: a year ago or less; more than 1 year, but not more than 2 years; more than 2 years, but not more than 3 years; more than 3 years, but not more than 5 years; and over 5 years ago.
