Codes and Frequencies
For sample adults aged 40 years and older who ever had a CT colonography or virtual colonoscopy (CTCOLEV), CTCOLLGYRR1 is a recoded variable that reports the time since the respondent's most recent procedure using the same method as the 2005 survey.
This recoded variable is based on the following variables:
The 2010 and 2015 Cancer Layout file notes that, "This is a time category recode for the time since the most recent CT colonography or virtual colonoscopy. All available information was used and the recoded variable was pre-filled with the response to the time category question first, if available. These data are provided by the respondent and are not imputed."
For more information, please see CTCOLEV.
- 2010; 2015: Sample adults age 40+ who have had a CT colonography or virtual colonoscopy.
- 2010, 2015
- 2010 : SAMPWEIGHT