The proportion of teenagers who are sexually active and the consis- tency of contraceptive use are the key factors that affect the proba- bility of pregnancy in the adolescent population.
Once a pregnancy occurs, the proportion of teenagers who voluntarily terminate their pregnancy, give birth in- or out-of-wedlock, or relinquish their child for adoption affects the number of teenagers who become parents and the number who become unmarried parents.
A change in the size of the ado- lescent population or in any of these factors will ultimately produce a change in the number of adolescent parents.
Thus, it is important to examine recent trends and current levels in the frequencies of an entire range of behaviors in order to understand trends in adolescent pregnancy and childbearing.
The statistical appendix is organized into eight sections contain- ing tables with brief accompanying summaries.
Sections 1 through 4 present data on teenagers at successive points along the path to ado- lescent pregnancy, including sexual activity, contraceptive use, and premarital pregnancy.
This statistical appendix is one part of a comprehensive examina- tion of adolescent pregnancy and childbearing conducted by the Panel on Adolescent Pregnancy and Childbearing, under the auspices of the National Research Council's Committee on Child Development Research and Public Policy.
The study was supported by a consortium of private foundations, including the Rockefeller Foundation, the Ford Founda- tion, the Robert Wood Johnson Foundation, the William and Flora Hewlett Foundation, and the Charles Stewart Mott Foundation.
The addendum to this volume contains detailed descriptions of the major sources of data used for constructing the tables. S 2.9 16 32.2 29.0 12.2 8.7 i7 49.6 46.7 24.; 19.- 18 66.9 6S.5 39.0 38.9 19 79.3 76.5 55.8 62.0 20 86.0 79.9 68.0 70.8 ~453 192 496 183 Note: Sample is limited to respondents age 20 and over at 1983 survey date .
* Percentages refer to birthday for specified ages, e. , 15 me ens by 1 Hispanic persons may be of any race.
STATI STICAL APPENDIX TRENDS IN ADOLE SCENT SEXUAL AND FERTILITY BEHAVIOR Kristin A. To date, much of the public data on prevalence of sexual activ- ity by age, sex, race and cohort in the United States, as well as trends in pregnancies, births, abortions, marriage and adoption, have not been available in any single source.
Much of the information pre- sented in this statistical appendix was derived f rom data published by various federal government agencies, including the U. Bureau of Census and the National Center for Health Statistics.
Black females were more likely to be sexually active by age 20 than whites and Hispanics regardless of mother's education.