Title Page
Contents
국문초록 8
ABSTRACT 10
I. Introduction 13
II. Objectives 16
III. Materials and Methods 17
A. Ethical statement 17
B. Sample size calculation 17
C. Participants 18
D. Wearable devices 19
E. Cardiopulmonary exercise test 20
F. Statistical analysis 21
IV. Results 24
V. Discussion 37
VI. Conclusion 44
References 45
Appendix 53
Table 1. Baseline characteristics of participants 25
Table 2. Average heart rate differences between each wearable device and 12 lead echocardiography 27
Table 3. Paired absolute difference, mean absolute percentage error and intra-class correlation coefficient of each device... 30
Table 4. Intra-class correlation coefficient in accordance to heart rate interval 34
Figure 1. Bland-Altman analysis and 95% limits of agreement with HR measured by 12 lead ECG. Solid horizontal lines... 33
Figure 2. Intra-class correlation coefficient of wearable devices 36