Hsieh MJ, et al. - Researchers performed a comparison of cardiopulmonary resuscitation (CPR) performance among laypeople with different retraining intervals. Sixty non-medical university students, who were randomly allocated into 3 groups after receiving initial CPR and automated external defibrillator (AED) training, completed the study. Every 3-, 6-, and 12 months, the participants in the 3-, 6-, and 12-month groups received the same retraining. Young laypeople with a 3-month retraining interval demonstrated the highest pass rate when performing conventional CPR. However, a consideration could be made for a 6-month retraining interval for training compression-only CPR and AED when balancing outcomes and resources.