CTCOLLDYR is a 4-digit-numeric variable.
0: Not in universe
9996: Time period format
9998: Unknown-not ascertained
9999: Unknown-don't know
For sample adults aged 40 years and older who ever had a CT colonography or virtual colonoscopy (CTCOLEV) and who chose to respond in month/year format, CTCOLLDYR reports the year of the respondent's CT colonography or virtual colonoscopy. CTCOLLDMOreports the month of most recent CT colonography or virtual colonoscopy, accompanies this variable. These two variables should be used together.
The survey form directed interviewers to, "Enter year of last CT colonography or virtual colonoscopy."
For more information, please see CTCOLEV.
- CTCOLLESTY: grouped year estimate of the number of years since the respondent's last CT colonography or virtual colonoscopy
- 2010; 2015: Sample adults age 40+ who have had a CT colonography or virtual colonoscopy.
- 2010, 2015
- 2010 : SAMPWEIGHT