An interpolated map of the U.S. showing a range betweenhigh (37%) and low (19%) responses to 'At what age are people supposed to start doing home blood stool tests?' (HINTS 2003 CC-14 Responded '50'). High values are found in the coast states of the northeast. Middle values are found in the midwest, south and west. Lowest values are found in Florida, and pockets of central New York, South Carolina and central Virginia.