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Duration taking estrogen: Number of units

Codes and Frequencies

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For female sample adults aged 40 and older in 1987 and, female sample adults aged 18 and older and who have ever taken estrogen and gave a valid response to whether they were taking estrogen in 1999, ESTROGNO reports a numerical value associated with a type of time unit (ESTROGTP) that indicates the person's duration of taking estrogen. Respondents were instructed to include any breaks in estrogen usage that lasted less than 30 days.

Please refer to the universe tab for more detailed information on the universe of this variable.


Changes in the universe may affect the comparability of this variable. As always, data users should use the prescribed IPUMS NHIS weights.


  • 1987: Half of female sample persons age 40+ (excluded from CACT) who have ever taken estrogen pills.
  • 1999: Female sample adults who have ever taken estrogen and gave a known response to whether they were taking estrogen now AND who were age 18-39, not currently pregnant or unknown if pregnant, and had a menstrual period in the past 3 months that was less regular or lighter compared with 12 months ago OR who were age 40-49 and not pregnant or unknown if pregnant OR who were age 50+.


  • 1987, 1999