to find an association between substance use and risky sexual behavior and to find association between personality traits and risky sexual behavior among substance users.

The study was applied on 100 subjects classified into 2 groups: cases and control groups. Group 1(cases) 50 substance dependence patients are chosen sequentially from the addiction department of the psychiatry and addiction hospital in kasr-alainy and group 2 (controls) included 50 normal individuals, matched for age, sex and socioeconomic status. All participants are men, range from 18 to 40 years, were taking substances for at least 6 months, and all of them could read and write. Those with a comorbid axis I diagnosis were excluded from the study. Both groups were subjected to a full psychiatric sheet, sex risk subscale of risk assessment battery (RAB), and the Eysenck personality questionnaire (EPQ). Addiction severity index is applied on cases, urine sampling was done using urine drug screening strips and a laboratory test was done for HIV and hepatitis C virus detection.

no statistically significant difference between the 2 groups regards age, education, employment and social status. The most prevalent substance is Tramadol (96%) followed by Cannabis (72%) and Herion (58 %). Hepatitis C virus is detected in (16 %) of cases, non of them have HIV infection. There were statistically significant difference in extroversion and neuroticism between cases and controls. There were a statistically significant difference between cases and controls in the sex risk subscale of RAB.There was a significant correlation between psychotocism and criminality subscales of (EPQ) and the sex risk subscale of RAB.