Factors affecting substance use and self-efficacy status of students in eastern Turkey.

This descriptive cross-sectional research sample was consisted of 613 high school students in Eastern Turkey. Data were collected by using the Questionnaire on Substance Use and its Causes and Self-Efficacy in the Prevention of Substance Abuse Scale (SEAPSAS). Data were analyzed with percentiles, Chi-Square, ANOVA, Kruskal Wallis, correlation and regression. Almost 40% of the students had tried smoking and 21.7% of them smoked sometimes or regularly. The mean age of students' first cigarette use was 13.5. More than 60% of the students had tried alcohol and almost 50% of them drink alcohol sometimes or regularly. The mean score of SEAPSAS was 93.61 ± 18.99. Lower self-efficacy scores were found in males, in students who perceived themselves as unsuccessful at school, in those with negative family and friendship relations, in students who smoked, drank alcohol, who had a drug user in the family and who experienced traumatic events in a lifetime