For the present study, a suburban community residing in Phitsanulok Province was selected by purposive sampling. The study period was from May to December 2009. One hundred twelve
adolescent boys and 10 parents were enrolled in quantitative and qualitative data collection, respectively, to identify predictive factors associated will risky sexual
behavior as part of a situation analysis phase. Research and development processes provided steps to develop the prevention program. This developed model was carried out among 74 adolescent boys who completed the program along with 74 of their parents. Measures were collected at baseline (T1), after the intervention (T2) and at one and two months (T3, T4) after the program. The study achieved a 95% retention rate. Subjects were eligible if
they were male, aged 10-13 years and their parents were willing to participate. The
research protocol was approved by the Mahidol University Institutional Review Board