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Age at first sex
Group: Fertility

This is a 3-digit variable that represents the respondent's age the first time she had sexual intercourse, except for the following codes.

994 = Never had sex
995 = Not interviewed (female questionnaire)
996 = Not interviewed (household questionnaire)
997 = Don't know
998 = No response
999 = NIU (not in universe)


AGE1STSEX indicates the woman's self-reported age the first time she had sexual intercourse.

AGE1STSEX has not been logically edited to remove unusually low values, which were present in the original data.

The question associated with this variable was included in the female questionnaire.


There are no comparability problems.

Comparability with IPUMS-DHS

AGE1STSEX in IPUMS-PMA is similar to the variable AGEFRSTSEX in IPUMS-DHS. The wording of the question corresponding to the IPUMS-DHS variable varies slightly over time, which may affect comparability; see the Survey Text and Universe Tab of the IPUMS-DHS variable for more information.


  • Women age 15-49.


  • Burkina Faso: 2014-2018, 2020
  • Congo (Democratic Republic): 2013-2019
  • Cote d'Ivoire: 2017-2018
  • Ethiopia: 2014-2019
  • Ghana: 2013-2017
  • India: 2016-2018
  • Indonesia: 2015-2016
  • Kenya: 2014-2019
  • Niger: 2015-2018
  • Nigeria: 2014-2019
  • Uganda: 2014-2019