Implementation of “Kids Save Lives” program on students from different levels of secondary education in the Thessaly region, Greece
Purpose: This research aimed to discover differences in the effect “Kids Save Lives” program on the two different levels of secondary education in Greece, Gymnasiums and Lyceums. 
Materials-Method: The “Kids Save Lives” program was implemented on randomly selected Gymnasiums and Lyceums in the Thessaly region, Greece. The students’ age attending in Gymnasiums varied between 13 to 15 years and 16 to 18 in Lyceums. 2411 participants filled in a 12-question questionnaire before and after the program to document the level of theoretical knowledge while skills were evaluated with the use of manikins under the supervision of  BLS instructors. SPSS v22 statistical suite was used for data processing.
Results: The overall percentages of correct answers showed that the effect of the program is more evident in Lyceum students (51% and 87.9% correct answers prior and after the program, respectively) compared to Gymnasium ones (47.2 %and 78.5% before and after, respectively) (p<0.05). Willingness to perform cardiopulmonary rescusitation (CPR) was high on both groups studied, with Lyceum attendants having higher results at the end of the program (98%) (p<0.05). Almost 80% of Lyceum students could detect cardiac arrest compared to 66% of  Gymnasium students (p<0.001). The same percentages were recorded on the question regarding the correct BLS algorithm with the difference being statistically significant (p<0.001). On the practical skills, Lyceum students scored significantly better results on the evaluation of compression depth (p<0.001), which can be attributed to their grater muscle strength. 
Conclusions: Our findings support that “Kids Save Lives” program is more effective among Lyceum students in terms of attributes, willingness, theoretical knowledge and practical skills of CPR. Further research is needed to identify the most appropriate age group for the delivery of the program to maximize its effectiveness.

2 - Implementation of “Kids Save Lives” program on students from different levels of secondary education in the Thessaly region, Greece