216793 Pregnancy among women who over-reported condom use as measured by a biomarker for unprotected sex

Monday, November 8, 2010 : 8:30 AM - 8:50 AM

Janet E. Rosenbaum, PhD, AM , Maryland Population Research Center, University of Maryland, College Park, MD
Ralph DiClemente, PhD , Rollins School of Public Health and Center for AIDS Research, Emory University, Atlanta, GA
Eve S. Rose, MSPH , Rollins School of Public Health, Department of Behavioral Science and Health Education, Emory University, Atlanta, GA
Gina M. Wingood, MPH ScD , Rollins School of Public Health Department of Health Sciences and Behavioral Education, Emory University, Atlanta, GA
Jonathan Zenilman, MD , Infectious Diseases Division, Johns Hopkins Bayview Medical Center, Baltimore, MD
Adolescents may use condoms inconsistently or incorrectly. This study uses a biomarker for semen Y-chromosome (Yc) detected on a vaginal swab to evaluate the accuracy of adolescent women's reports of condom use. 715 low socioeconomic status African-American adolescent women recruited from central urban Atlanta STD clinics were surveyed at baseline, 6 months, and 12 months. 30.3% of the women who reported perfect condom use tested positive for Yc at baseline, as did 20.2% at 6 months. Women who tested positive for Yc at baseline were about 4.5 times as likely to become pregnant in the next 6 months than women who did not, in logistic regression adjusting for condom and oral contraceptive use (p=0.005). Similarly, women who tested positive for Yc at 6 months were 2.4 times as likely to become pregnant (p=0.11). The Yc biomarker can tell women whether they are using condoms correctly and consistently before unwanted pregnancy. The Yc biomarker may also be a useful measure for survey researchers seeking to validate survey questions about condom use and unprotected sex in different populations.

Learning Areas:
Biostatistics, economics
Public health or related public policy
Public health or related research
Social and behavioral sciences

Learning Objectives:
Audience members will be able to describe the biomarker test for unprotected sex, and associations between the biomarker for unprotected sex and pregnancy.

Keywords: Reproductive Planning, Condom Use

Presenting author's disclosure statement:

Qualified on the content I am responsible for because: I analyzed the data and formulated the hypotheses and wrote the paper, consulting with co-authors.
Any relevant financial relationships? No

I agree to comply with the American Public Health Association Conflict of Interest and Commercial Support Guidelines, and to disclose to the participants any off-label or experimental uses of a commercial product or service discussed in my presentation.