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LETTER |
Joshua R. Mann is with the School of Medicine, University of South Carolina, Columbia. Curtis Stine is with the Department of Family Medicine and Rural Health, College of Medicine, Florida State University, Tallahassee.
Correspondence: Requests for reprints should be sent to Joshua R. Mann, MD, MPH, Department of Family and Preventive Medicine, University of South Carolina School of Medicine, 3209 Colonial Drive, Columbia, SC 29203 (e-mail: Joshua.mann@sc.edu).
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Santelli et al.1 appear to have underestimated the contribution of current sexual activity to declining pregnancy rates among adolescents aged 15 to 17 years. The authors calculated a contraceptive risk index (the weighted average of estimated "typical use" failure rates for contraceptive methods reportedly used at last intercourse), assuming this index accurately reflects the risk of pregnancy among sexually active adolescents. But a review of pregnancy data for 1995 and 2002 reveals that the calculated index does not consistently correspond with actual pregnancy risk for sexually active adolescents aged 15 to 17 years.
Pregnancy risk among sexually active adolescents can
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