BACKGROUND Respondent driven sampling (RDS) was designed to study 'hidden' populations, for which there are no available sampling frame. RDS has been shown to recruit far into social networks of the study population and achieve unbiased estimates when certain assumptions are fulfilled. Web-based respondent driven sampling (WebRDS) has been implemented among MSM in Vietnam and produced a suffici...

in a study to determine the influence of sexual behaviour to hiv contamination, in 22 patients infected with aids in iran, this survey was conducted. the subjects were 21 male and one female. one of the male patients was from uganda, another was an intravenous drug addict, and one patient has been abroad for sometime. one of the patients had been abroad and received blood there, and other patie...

Several studies have reported an association between deviant behaviour and cortisol reactivity to stress. However, relatively few studies have investigated the relationship between psychobiological stress reactivity and sexual risk-taking behaviours. In this study, cortisol reactivity to the Trier Social Stress Test (TSST) was measured in 26 healthy young adults prior to the administration of a...

BACKGROUND The age of initiation of sexual intercourse is an increasingly important issue to study given that sexually active young women are at risk of multiple outcomes including early pregnancies, vesico-vaginal fistula, and sexually transmitted infections. Much research has focused on the demographic, familial, and social factors associated with sexual initiation and reasons adolescents beg...

A cross-sectional study was performed to explore the behaviour of female intravenous drug users (lOUs) in Madrid, Spain, to determine the relationships between behaviour and a number of dependent variables. We considered: l.Sociodemographic characteristics Drug-taking behaviour, sexual behavior (including prostitution), reproductive health, and utilisation of services targeted at female IDUs. 2...