biostudies-literatureUnknown7Spyratos DG<h4>Background</h4>The aim of the present study was to investigate epidemiological data about cigarette smoking in relation with risk and preventive factors among Greek adolescents.<h4>Methods</h4>We randomly selected 10% of the whole number of schools in Northern Greece (133 schools, 18,904 participants were included). Two anonymous questionnaires (smoker's and non-smoker's) were both distributed to all students so they selected and filled in only one. A parental signed informed consent was obtained using an informative leaflet about adolescent smoking.<h4>Results</h4>The main findings of the study were: a) 14.2% of the adolescents (mean age+/-SD: 15.3+/-1.7 years) reported regular smoking (24.1% in the age group 16-18 years), b) 84.2% of the current smokers reported daily use, c) studentSubstance abuse treatment, prevention, and policy38https://www.ebi.ac.uk/biostudies/studies/S-EPMC3511804biostudies-literatureSmoking among adolescents in Northern Greece: a large cross-sectional study about risk and preventive factors.PMC3511804Karetsi ESpyratos DGPelagidou DTHaidich ABKonstantopoulos SSichletidis LTChloros DKoubaniou CGourgoulianis KfalseSmoking among adolescents in Northern Greece: a large cross-sectional study about risk and preventive factors.<h4>Background</h4>The aim of the present study was to investigate epidemiological data about cigarette smoking in relation with risk and preventive factors among Greek adolescents.<h4>Methods</h4>We randomly selected 10% of the whole number of schools in Northern Greece (133 schools, 18,904 participants were included). Two anonymous questionnaires (smoker's and non-smoker's) were both distributed to all students so they selected and filled in only one. A parental signed informed consent was obtained using an informative leaflet about adolescent smoking.<h4>Results</h4>The main findings of the study were: a) 14.2% of the adolescents (mean age+/-SD: 15.3+/-1.7 years) reported regular smoking (24.1% in the age group 16-18 years), b) 84.2% of the current smokers reported daily use, c) student2012-01-01T00:00:00Z2012 Sep2025-04-19T12:26:31.615Z2019-03-27T01:01:18ZS-EPMC35118042296375510.1186/1747-597X-7-38