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Time since last sigmoidoscopy: Grouped year recode 1 (2000 method)

Codes and Frequencies

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For sample adults aged 40 years and older who ever had a sigmoidoscopy (SIGEV), SIGLGYRR1 is a recoded variable that reports the time since the respondent's most recent sigmoidoscopy using the same method as the 2000 survey.

For more information, please see SIGEV.


This recoded variable is based on the following variables:

  • SIGLNO: Time since last sigmoidoscopy: units
  • SIGLTP: Time since last sigmoidoscopy: time period
  • SIGLDMO: Calendar month of last sigmoidoscopy
  • SIGLDYR: Year of last sigmoidoscopy
  • SIGLESTY: Time since last sigmoidoscopy: grouped year estimate

The Cancer Layout file notes that, "This is a time category recode for the time since the most recent sigmoidoscopy. This variable uses the same information collected in 2000 and 2003, and the same estimation method used in 2000."

SIGLGYRR2 is a similar variable using the same method as the 2005 survey.


There are no comparability issues.


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


  • 2010, 2013, 2015, 2018