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Time since last sigmoidoscopy: Grouped year estimate

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For sample adults aged 40 years and older who ever had a sigmoidoscopy (SIGEV), and who did not give the date of the exam or who selected years ago in the time period format, SIGLESTY reports the grouped year estimate of the number of years since the respondent's last sigmoidoscopy.

For more information, please see SIGEV.


There are no comparability issues.


  • 2010; 2013; 2015; 2018: Sample adults age 40+ who have had a Sigmoidoscopy and REF/DK date of most recent Sigmoidoscopy or selected years ago for the time period format.


  • 2010, 2013, 2015, 2018