For sample adults age 40 and over who have ever had a blood stool test, except for those for whom the date of exam was unknown, BSTOMOR reports the number of months since the person's most recent office blood stool test.
Comparability
There are no comparability issues.
Universe
2000: Sample adults age 40+ who ever had office blood stool test, except for those for whom the date of the exam unknown.
