## 3 Results
### CPR Performance with No-Feedback and with Real-Time Feedback System
#### 3.1.4 Compression Duty Cycle  
The medical participants performed infant CPR using the TT compression technique, see Figure 5d. The mean value of the achieved chest compression duty cycle mechanism during no performance feedback was 46.68 \(\pm\) 3.71% compared to the compression duty cycle parameter mean value 48.8 \(\pm\) 1.95% during performance feedback. During CPR, there was an improvement in the compression duty cycle parameter during the feedback performance of approximately 5% compared to CPR performance without feedback. The median value of the compression duty cycle parameter during no feedback and feedback performance were 46% and 49%, respectively. The difference and percentage of difference between the no feedback and feedback group were 3% and 7%. There was a significant difference in the compression duty cycle parameter with feedback-assisted performance compared to unassisted performance (\(p<0.05\)). The medical participants performed infant CPR using the TF compression technique, see Figure 5d. The mean value of the achieved chest compression duty cycle using the TF compression mechanism during no performance feedback was 43.36 \(\pm\) 1.89% compared to the compression duty cycle parameter mean value 46.04 \(\pm\) 2.02% with feedback. During CPR, there was an improvement in the compression duty cycle parameter with feedback-assisted performance of approximately 6% compared to CPR performance without feedback. The median value of the compression duty cycle parameter with no feedback and feedback performance were 43% and 46%, respectively. The difference and percentage of difference between the no feedback and feedback group were 3% and 7%. There was a significant difference in compression duty cycle parameter with feedback-assisted performance compared to unassisted performance (\(p<0.05\)). Thus, the feedback system improved the quality of the compression duty cycle parameter during CPR performance. The lay participants performed infant CPR using the TT compression technique, see Figure 5d. The mean value of the achieved chest compression duty cycle during no performance feedback was 44.68 \(\pm\) 1.93% compared to the compression duty cycle parameter mean value 46.92 \(\pm\) 2.44% during feedback. During CPR, there was an improvement in the compression duty cycle parameter with the feedback of approximately 5% compared to CPR performance without feedback. The median value of the compression duty cycle parameter during no feedback and feedback performance were 45% and 47%real-time. The difference and percentage of difference between the no feedback and feedback group were 2% and 4%. There was a significant difference in the compression duty cycle parameter with feedback-assisted compared to unassisted performance (\(p<0.05\)). The lay participants performed infant CPR using the TF compression technique, see Figure 5d. The mean value of the achieved chest compression duty cycle during no performance feedback was 43.2 \(\pm\) 2.60% compared to compression duty cycle parameter mean value 45.16 \(\pm\) 2.03% during feedback. During CPR, there was an improvement in the compression duty cycle parameter with the feedback of approximately 5% compared to CPR performance without feedback. The median value of the compression duty cycle parameter during no feedback and feedback performances were 43% and 45%, respectively. The difference and percentage of the difference between the no feedback and feedback group were 2% and 5%. There was a significant difference in the compression duty cycle parameter with feedback-assisted performance compared to unassisted performance (\(p<0.05\)). To assess overall CPR quality during infant CPR, the proportion of rescuers that simultaneously achieved the recommended targets of all CPR parameters was calculated for each group, medical rescuers and lay rescuers during no feedback and feedback CPRusing the TT and TF chest compression techniques.