sexual attitudes

To identify risk factors,which include demographic characteristics,population- specific behavior characteristics,sexual attitudes,and related knowledge among the four groups.6.
5.研究上述四類人群危險性性行為發(fā)生的主要影響因素,包括社會人口學(xué)因素,行為特征因素,性態(tài)度開放程度,AIDS/STD相關(guān)知識等。