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LETTER |
The authors are with the Guttmacher Institute, New York, NY. John S. Santelli is also with the Heilbrunn Department of Population and Family, Mailman School of Public Health, Columbia University, New York.
Correspondence: Requests for reprints should be sent to John S. Santelli, MD, MPH, Heilbrunn Department of Population and Family Health, Mailman School of Public Health, Columbia University, 60 Haven Ave, B-2, New York, NY 10032 (e-mail: js2637@columbia.edu).
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We thank Mann and Stine for their interest in our recent article. We examined data on sexual activity and contraceptive use from the National Survey on Family Growth (NSFG) and found that most of the declines in US adolescent pregnancy from 1995 to 2002 could be attributed to improved contraceptive use: for 77% of the decline among those aged 1517 years and for all of the decline among those aged 1819 years.
The methodological improvement in calculating attributionin our Journal article and a previous article1was to calculate pregnancy risk by combining data on sexual activity, contraceptive use, and contraceptive
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