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Codes and Frequencies

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For sample female adults aged 18 and older, HYSTEV reports whether the respondent has had a hysterectomy.

HYSTEV was first introduced in 1991, as part of a supplement on health promotion and disease prevention.


This variable is comparable for 1991-1998 and 2000-2018. Comparability for 2019-forward may be impacted by the questionnaire redesign introduced in 2019. 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. Data users are reminded to use the prescribed IPUMS NHIS weights in their analyses.

The universe in 1999 is not comparable to other survey years (see the Universe tab for details). As a result, researchers should use caution in making comparisons between 1999 and any other year.

Finally, 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.


  • 1991: Female sample persons age 18+.
  • 1993: Half of sample persons age 18+ in quarters 3 and 4 (excluded from AIDS supplement).
  • 1994: Half of sample persons age 18+ (excluded from AIDS supplement).
  • 1998; 2000; 2005; 2008; 2010; 2013; 2015; 2018: Female sample adults age 18+.
  • 1999: Female sample adults who have not had a menstrual period in the past 3 or 12 months or who have never had a menstrual period or who had an unknown response for whether they had a period in the past 3 or 12 months AND who are age 18 to 49 and not pregnant.
  • 2019: Female sample adults age 18+.


  • 1991, 1993-1994, 1998-2000, 2005, 2008, 2010, 2013, 2015, 2018-2019


  • 1991, 1998-2000, 2005, 2008, 2010, 2013, 2015, 2018-2019 : SAMPWEIGHT
  • 1993-1994 : SUPP2WT