[If Respondent is female:] In what year did you first take birth control pills regularly for at least one monthly cycle?

Conceptual Variable

Name
1176
Label
[If Respondent is female:] In what year did you first take birth control pills regularly for at least one monthly cycle?
Add Health
Wave I Wave II
Wave I In-Home Interview Wave II In-Home Interview
Wave I In-Home Interview Data Wave II In-Home Interview
H1CO14Y H2CO17Y
1989 and before
0.63%
1990
1.89%
1991
3.39%
1992
7.64%
1993
19.06%
1994
36.30%
1995
30.55%
64.05%
1996
0.55%
35.95%
Add Health
Wave I Wave II
Wave I In-Home Interview Wave II In-Home Interview
Wave I In-Home Interview Data Wave II In-Home Interview
H1CO14Y H2CO17Y
1989 and before
0.04%
1990
0.12%
1991
0.21%
1992
0.47%
1993
1.17%
1994
2.22%
1995
1.87%
3.82%
1996
0.03%
2.14%
Dataset Variable Valid Invalid Min First Quartile Median Third Quartile Max Mean StdDev
Wave I In-Home Interview Data H1CO14Y 1,270 19,475 89 96
Wave II In-Home Interview H2CO17Y 879 13,859 95 96