Markus Steiner

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Challenges in the accurate measurement of sexual behavior in human immunodeficiency virus (HIV) prevention research are well documented and have prompted discussion about whether valid assessments are possible. Audio computer-assisted self-interviewing (ACASI) may increase the validity of self-reported behavioral data. In 2006-2007, Zimbabwean women(More)
OBJECTIVES To evaluate the training of pharmacists in Accra, Ghana, in the syndromic management of STIs. METHODS We randomly selected 50 pharmacy outlets that had received the training (intervention) and 50 outlets that had not received the training (no intervention). Simulated clients described the symptoms of urethral discharge to the first pharmacy(More)
OBJECTIVE The objective of this study was to assess the validity of women's reports of recent unprotected sex by testing for prostate-specific antigen (PSA) in vaginal samples. STUDY DESIGN The authors conducted prospective research with 332 female sex workers attending 2 public dispensaries in Madagascar. RESULTS Among women who reported no sex or(More)
We assessed the validity of self-reported sex and condom use by comparing self-reports with prostate-specific antigen (PSA) detection in a prospective study of 210 female sex workers in Mombasa, Kenya. Participants were interviewed on recent sexual behaviours at baseline and 12-month follow-up visits. At both visits, a trained nurse instructed participants(More)
OBJECTIVE To compare the contraceptive effectivenesses of a polyurethane condom and a standard latex condom. Secondary outcomes of interest were safety, functionality, discontinuation, and acceptability. METHODS We randomized 901 couples to use either the polyurethane condom or a standard latex condom as their only form of contraception. We tested for(More)
In the midst of the global epidemics of both unintended pregnancy and sexually transmitted infection, contraceptive options that provide dual protection are ideal. However, those contraceptives with the best record of preventing pregnancy under typical use conditions (sterilization, hormonal methods, intrauterine devices) provide little if any protection(More)
OBJECTIVES This study examined whether past condom failure (breakage, slippage, or both) can predict future failure and evaluated other predictors of condom failure. METHODS At each of 3 international sites, approximately 130 male condom users were enrolled and given 5 condoms to use for vaginal intercourse over a 3-week period. RESULTS Men at increased(More)
BACKGROUND Many women want a lengthy duration of contraception but are wary of the menstrual changes from depot medroxyprogesterone acetate (DMPA). A subdermal levonorgestrel (LNG) implant may be a reasonable alternative. However, information on menstrual changes from these methods has not been summarized and compared in an easy-to-understand form. STUDY(More)
OBJECTIVES To evaluate the association between self-reported condom use and prevalent and incident chlamydia, gonorrhea, and trichomoniasis. STUDY DESIGN Prospective study of 414 males attending a sexually transmitted infection (STI) clinic in Jamaica. Condom use and STI status were assessed at enrollment and at 4 follow-up visits. RESULTS The analyses(More)
OBJECTIVE To identify factors related to consistency between women's "most important" reason for using contraception and their current contraceptive method. METHODS A sample of 433 women completed a written questionnaire on demographics, contraceptive use history and the "most important" reason for using contraception. Women were grouped by whether their(More)