Methods: A randomized sample stratified according to geographical area of the schools which have implemented the LST and a control group of schools with similar characteristics have been involved. A pre (before the training) and post (at the end of the year) test has been administered to 2364 students of 55 schools (1349 LST and 1015 control group). The survey focused on drug use behaviours, normative belief about drug use, well-being and on personal, social and drug refusal skills. Multilevel-model analyses were applied to the index outcomes to verify the differences between LST and control group in the post test. Pre test measures, gender, age and school were included as covariate at the individual and cluster level in the model.
Results: Data showed that the LST group had smoked less than the control group (LST 3.9%, Control 5.8%; p<.01) in the post test. Moreover, after the implementation of the first level of the program students reported less levels of distress (LST 3.52, Control 3.63; p<.05) and lower risk taking (LST 2.66, Control 2.81; p<.01). Students of the LST group also increased some of their skills, as anxiety coping (LST 2.98, Control 2.77; p<.001) and assertiveness (LST 4.17, Control 4.05; p<.01). Moreover, students’ normative belief changed: the LST group thought that less adults smoke (LST 3.09, Control 3.51; p<.001) or drink (LST 3.23, Control 3.49; p<.001) compared with the control group.
Conclusions: Data will be discussed according to the implementation problems. The results of the study demonstrate the efficacy of the Italian adaptation of the LST. Moreover, these results have been used in order to improve the quality of the implementation discussing the effects and the problems faced with health professionals and teachers. Follow-up data of the second level of the program have just been collected.