American Journal of Epidemiology Advance Access originally published online on August 24, 2005
American Journal of Epidemiology 2005 162(7):705; doi:10.1093/aje/kwi267
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American Journal of Epidemiology Copyright © 2005 by the Johns Hopkins Bloomberg School of Public Health All rights reserved
LETTERS TO THE EDITOR |
MACALUSO ET AL. REPLY
1 Division of Reproductive Health, Centers for Disease Control and Prevention, Atlanta, GA 30341-3724
2 Center for Epidemiology and Biostatistics, Children's Hospital Medical Center, Cincinnati, OH 45229-3039
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Zaviacic and Ablin (1
) suggest that assessment of semen exposure based on pre- and postcoital measurement of prostate-specific antigen (PSA) in vaginal fluid is not valid for evaluating condom effectiveness (2
, 3
). We disagree for two reasons: 1) in the absence of semen exposure, the small amount of PSA produced by the female paraurethral glands would yield PSA values below the