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Calendar month of last sigmoidoscopy

Codes and Frequencies

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For sample adults aged 40 years and older who ever had a sigmoidoscopy (SIGEV), SIGLDMO reports the calendar month of the respondent's most recent sigmoidoscopy. SIGLDYR, which reports the year of most recent sigmoidoscopy, accompanies this variable.

For more information, please see SIGEV.


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


There are no comparability issues.


  • 2010; 2013; 2015; 2018: Sample adults age 40+ who have had a Sigmoidoscopy.


  • 2010, 2013, 2015, 2018