COLLDYR 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 and older who ever had a colonoscopy (COLEV), COLLDYR reports the year of the respondent's colonoscopy. COLLDMO reports the month of most recent colonoscopy, accompanies this variable. These two variables should be used together.
The survey form directed interviewers to, "Enter year of last colonoscopy."
For more information, please see COLEV.
- 2010; 2013; 2015: Sample adults age 40+ who have had a colonoscopy.
- 2010, 2013, 2015
- 2010, 2013 : SAMPWEIGHT