Validity analysis
The first part of questionnaire, which examined satisfaction with the health education leaflet, had a total of 10 questions, and the average CVI score was 0.975. The second part of the questionnaire, which covered satisfaction with video-based education, had a total of nine questions, and the average CVI score was 0.972. The third part of the questionnaire, which was a self-care comprehension assessment, had a total of six questions, and the average CVI score was 0.979. The questionnaire was thus valid.