Data analysis
SECONDARY
The difference in the primary outcome, the participants’ knowledge of the Japanese health system gained after playing the For the secondary outcome, we examined the change in the mean CSQ-8 scores recorded pre- and post-intervention between the groups with a t test. To evaluate the pre- and postintervention scores between groups, the difference in differences test was used. We used Cronbach’s alpha to test the reliability of the questionnaire.For the third outcome regarding willingness, we compared the pre- and postintervention and between-group behavioral score changes with the chi-square test. All data analyses were performed using the JMP statistical package (version 14.0, SAS Campus Drive, Cary, NC 27513, USA).