Condom Use as a Function of Time in New and Established Adolescent Sexual Relationships
J. Dennis Fortenberry, MD, MS,
Wanzhu Tu, PhD,
Jaroslaw Harezlak, MS,
Barry P. Katz, PhD and
Donald P. Orr, MD
The authors are with the Section of Adolescent Medicine, Division of Biostatistics, and the Regenstrief Institute for Health Care, Indiana University School of Medicine, Indianapolis.

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FIGURE 1— Number of days to first condom nonuse: established and new relationships (KaplanMeier survival curves; P < .05 by Wilcoxon test).
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Copyright © 2002 by the American Public Health Association