Résumé :
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[BDSP. Notice produite par INIST wPLGR0x9. Diffusion soumise à autorisation]. Objectives. In the framework of the evaluation of a smoking prevention program for youngsters, a reliability study of the questionnaire was conducted. The questionnaire was designed to measure attitudes, self-efficacy, perceived social norms, social skills, short-term and long-term intentions to smoke, knowledge of smoking restrictions at school, communication with smokers and non-smokers and smoking behaviour of the respondents as well of their parents, siblings and friends. Methods. A total of 753 students were eligible for a test-retest evaluation of the questionnaire with a 2-weeks interval. Out of these 753 pupils, 656 (87%) had duplicate questionnaires, reasons for drop-out mainly being absence and incorrect identification data resulting in problems of individual matching. Test-retest agreement of the data was statistically evaluated according to intra-class correlation coefficients (ICC) and kappa statistics. Results. The ICC coefficients for attitude, self-efficacy and communication with smokers and non-smokers were between 0.57 and 0.80. However, the mean score at the retest for self-efficacy and communication with smokers of the students as a group, showed a highly significant systematic increase compared to the first test. Highest kappa statistics (>0.90) were found for smoking behaviour of the parents, while lowest velues were observed for each of the 3 perceived social norms items ( 0. (...)
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