PT Journal AU Spacilova, L Klusonova, H Petrelli, F Signorelli, C Visnovsky, P Grappasonni, I TI SUBSTANCE USE AND KNOWLEDGE AMONG ITALIAN HIGH SCHOOL STUDENTS SO Biomedical papers PY 2009 BP 163 EP 168 VL 153 IS 2 DI 10.5507/bp.2009.028 DE Drug usage/High school students/Italy AB Aims: This study was aimed for evaluation of Italian students' attitudes to addictive substances, their knowledge and personal experience, and their awareness about the risks.Methods: The research was realized among high school students from Marche region in the Central Italy in the year 2006; the study group was randomly chosen from all schools in the region. 4118 appropriately completed questionnaires returned. The statistic processing was carried out by using chi-square test for two qualitative variables. ER