ABSTRACT
Regarding little information about sexual behavior of vulnerable women to AIDS, mentioned in the second report of Ministry of Health and Medical Education [2006], this study has been conducted to determine the function of vulnerable and at-risk women to AIDS in Tehran in 2009. This descriptive study was done on 128 vulnerable and at-risk women who participated in this study in Tehran in 2009. The samples were a combination of available visitor passed to Drop-in Centers, behavioral or triangular clinic and those who were introduced by participant women through Respondent Driven Sampling. Data were collected by trained interviewers. Quantitative and qualitative descriptive statistics was reported as numbers, percentages, and, also, Mean and Standard deviation respectively. Analytical findings and determination of differentiations and correlation were evaluated based on Chi-squared test. In this study only 22 [17.2%] of participants mentioned that they have always used condom. Partner unwillingness was the most common reason [64%] for not using condom. Twenty-four percent of participants have received free condom from triangular, Drop-in and health centers in the last year. Only 32[25%] had done HIV test. The study showed the function of at-risk women in prevention of HIV/AIDS is not satisfactory. If the situation continues in this way, vulnerable women and society will be at more risk