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Age started taking birth control pills: Over or under 25

Codes and Frequencies

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For female sample adults ages 18 and older who have ever used birth control pills, BCPILLAGE25 reports whether the respondent was younger than 25, or 25 or older when she first started taking birth control pills.

BCPILLAGE25 was first introduced in 1987 as part of a supplement on cancer epidemiology. For related variables, please use the IPUMS NHIS search function or drop-down menus.


There are no comparability issues with this variable.


  • 1987: Half of female sample persons age 18+ (excluded from CACT supplement) who ever used birth control pills.


  • 1987