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Time since last digital rectal exam: Time period

Codes and Frequencies

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For sample persons ages 40 and older who have heard of and had a digital rectal exam but did not report the month and year of their last exam, DRXTP reports a type of time unit (days, weeks, months, or years) associated with a numerical response (DRXNO) that reports the length of time since the person's most recent digital rectal exam. Users should combine these two variables to determine the length of time since the person's last digital rectal exam.


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 IPUMS NHIS weights.


  • 1987: Half of sample persons age 40+ (excluded from CAEP supplement) who have heard of a digital rectal exam and have had exam but don't know month/year of last exam.
  • 1992: Sample persons age 40+ who have heard of a digital rectal exam, have had a digital rectal exam, and for whom the month and year of last exam was not ascertained.


  • 1987, 1992