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Time since last proctocopic exam: Grouped years

Codes and Frequencies

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For sample persons/adults age 40 and over who have had a proctoscopic exam, PROCEXGMO reports the grouped years since their last exam.

For related variables, please use the IPUMS NHIS search function and drop-down menus.


Apart from changes in the universe, this variable is mostly comparable over time. Changes in survey design (e.g., quarters in which the supplement was collected) may affect raw frequencies, but do not affect comparability of the variable. As always, data users should use the prescribed IHIS weights.


  • 1992: Half of sample persons age 40+ in quarters 1 and 2 and in 2 weeks of quarter 3 (excluded from CAEP supplement) who have heard of a proctoscopic exam and have had a proctoscopic exam.
  • 1998: Sample adults age 40+ who have had a proctoscopic exam.


  • 1992, 1998