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Calendar month of last colonoscopy

Codes and Frequencies

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For sample adults aged 40 and older who ever had a colonoscopy (COLEV), COLLDMO reports the calender month of the respondent's most recent colonoscopy. COLLDYR reports the year of most recent colonoscopy, accompanies this variable. These two variables should be used together.

The survey document directed interviewers to, "Enter month of last exam," and "Enter '96' to go to number and time period format."

For more information, please see COLEV.


There are no comparability issues.


  • 2010; 2013; 2015: Sample adults age 40+ who have had a colonoscopy.


  • 2010, 2013, 2015