Introduction:
South Korea is becoming increasingly characterized by the “elderly caregiving” system, where the elderly care for the elderly. The frequency of sudden cardiac arrest increases with age, emphasizing the importance of bystander CPR for older adults. Lay CPR training is skewing toward younger people. It does not fully reflect the auditory, visual, and cognitive characteristics of older adults as they age.

Purpose:
We developed a training video for elderly people aged 65 years and older and analyzed the effects of the video on chest compression skills and accuracy and satisfaction with the training video. This is a resource for expanding and promoting CPR education for the elderly.

Methods:
This is a quasi-experiment with a non-equivalent control group design to validate the study. The experimental group was composed of 29 participants, and the control group was composed of 29 participants. The experimental group had provided 30 minutes of 'CPR training video customized for the elderly' and the control group had provided 30 minutes of 'standard CPR training video for the general public'. The participants assessed their chest compression skills and accuracy during the follow-along phase of the video and their satisfaction with the video after the training.

Results:
When evaluating the subjects' ability to perform chest compressions, the experimental group scored 1.72 ± 0.45 for 'hand shape' (on a 0–2 point scale), which was significantly higher than the control group's 1.45 ± 0.51 (p<.05). In 'arm verticality', the experimental group scored 1.79 ± 0.41 and the control group scored 1.28 ± 0.45, which was significantly higher than the control group (p<.001). When evaluating the accuracy of the subjects' chest compression technique, the experimental group showed significantly higher accuracy than the control group in mean compression rate (103.26±9.15 compressions per minute, cpm), compression position accuracy (90.10±3.09%), and compression release rate (89.03±1.75%) (p<.001). For mean compression rate, both groups performed within standard guidelines of 100 to 120 compressions per minute. Subjects' ratings of satisfaction with the training videos showed that the experimental group was significantly more satisfied than the control group in all auditory, visual, and cognitive domains (p<.05 to p<.001).

Conclusion:
The chest compression skills assessment showed that the experimental group had significantly higher skills in 'hand shape' and 'arm verticality' than the control group. This shows that personalized training videos have a positive effect on skills such as chest compressions. The skill accuracy assessment showed that the experimental group had significantly higher accuracy than the control group in average compression speed, compression position accuracy, and compression relaxation rate. This suggests that the customized training video had a learning effect on the factors of high-quality CPR. In terms of satisfaction with the training videos, the experimental group had higher satisfaction scores than the control group in all cognitive, visual, and auditory factors. This suggests that the customized aging people’s CPR training videos are effective.

Keywords: CPR, Sudden cardiac arrest, Elderly CPR training.