Description
For sample adults aged 40 years and older who ever had a CT colonography or virtual colonoscopy, CTCOLLGYRR2 is a recoded variable that reports the time since the respondent's most recent CT colonography or virtual colonoscopy using the same method as the 2000 survey.
For more information about CT colonography or virtual colonoscopy variables, please see CTCOLEV.
[show more]The 2015 Cancer Layout file note that, "This is a time category recode for the time since the most recent CT colonography or virtual colonoscopy. This variable uses the same information collected in 2000 and 2003, and the same estimation method used in 2000."
A similar variable, CTCOLLGYRR1, is a recoded variable that reports the time since the respondent's most recent CT colonography or virtual colonoscopy using the same method as the 2005 survey.
