Codes and Frequencies
For sample adults aged 40 years or older, COLEV indicates whether the respondent ever had a colonoscopy.
The survey form directed interviewers to read if necessary, "A polyp is a small growth that develops on the inside of the colon or rectum. Before these tests, you are asked to take a medication that causes diarrhea."
According to the 2010 and forward Field Representative's Manual, this and related questions were asked:
The 2010 and forward Manual further provided the following definition for cancer:
The Manual also provided the following statement regarding how the data from the Cancer Screening questions would be used:
The 2015 sample layout file provides the following explanation:
According to the 2019 Field Representative's Manual, COLEV and related questions are part of the preventative screening section. This section is rotating core and will not be asked in every year. COLEV is one supplemental question in the preventative screen section in 2019. For more information about how the structure of the survey changed beginning in 2019 to include rotating core content, please see the user note.
The survey form directed interviewers to read if necessary: "Colonoscopy (colon-OS-copy) and sigmoidoscopy (sigmoid-OS-copy) are exams in which a doctor inserts a tube into the rectum to look for polyps or cancer."
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+.
- 2019: Sample adults age 40+.
- 2010, 2013, 2015, 2018-2019
- 2010, 2013, 2015, 2018-2019 : SAMPWEIGHT