Cardiopulmonary resuscitation (CPR) has recently been added to the school curriculum worldwide and is currently taught to students between the ages of 10 and 16 years. The effect of the age of trainees on their satisfaction with CPR training has yet been elucidated. The aim of this study was to compare the satisfaction of trainees of different ages who participated in CPR training in schools in Japan. In total, 392 primary school students (10–11 years old), 1798 junior high school students (12–13 years old), and 4162 high schools students (15–16 years old) underwent the same 3-h course of CPR training, according to the guidelines of 2000 for Emergency Cardiovascular Care and CPR. The course was evaluated by a questionnaire completed by the participants. Primary school students responded most positively to all questions, including those reflecting enjoyment and the confidence of participants to apply CPR (Jonckheere-Terpstra test: P < 0.01). Exploratory factor analysis defined three latent variables (reaction, concentration, and naïveté) based on the seven variables addressed in the questionnaire. In the causal relationships analyzed by structural equation modeling (SEM), naïveté (which is related to age) directly affected the other latent variables. The current model suggested that the students’ satisfaction with CPR training was strongly related to their age. Primary school students enjoyed CPR training more and were more confident in their ability to perform CPR than junior high and high school students were. Therefore, children aged 10–11 years may be the most appropriate candidates for the introduction of CPR training in schools.
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