Codes and Frequencies
For sample adults aged 40 years and older who ever had a sigmoidoscopy or both a sigmoidoscopy and colonoscopy (COLSIGEV), SIGLESTY reports the grouped year estimate of the number of years since the respondent's last sigmoidoscopy.
Prior to 2019, SIGLESTY was asked of 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
For more information, please see SIGEV.
The NHIS questionnaire was substantially redesigned in 2019 to introduce a different data collection structure and new content. For more information on changes in terminology, universes, and data collection methods beginning in 2019, please see the user note.
- 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.
- 2019: Sample adults age 40+ who ever had a sigmoidoscopy or had both a sigmoidoscopy and colonoscopy (COLSIGEV).
- 2010, 2013, 2015, 2018-2019
- 2010, 2013, 2015, 2018-2019 : SAMPWEIGHT