Analysis of a Pulse Rate Variability Measurement Using a Smartphone Camera

Table 4

Bland-Altman SD and BAR values for the ECG-PPG and the worst ECG(i)-ECG(j) correspondences.

		ECG-PPG	Worst ECG(i)-ECG(j)	(1)/(2)
Mean RR (ms)	SD; BAR	0.0093; <0.001	0.061; <0.001	0.15; n/a
RMSSD (ms)	SD; BAR	1.79; 0.104	1.21; 0.076	1.48; 1.37
SDNN (ms)	SD; BAR	0.776; 0.035	0.464; 0.021	1.67; 1.67
pNN50 (%)	SD; BAR	2.43; 0.306	1.631; 0.250	1.49; 1.22
TP (total power, ms^2)	SD; BAR	46.15; 0.10	21.84; 0.048	2.11; 2.08
LP (low-frequency power, ms^2)	SD; BAR	16.03; 0.089	5.74; 0.033	2.79; 2.70
HP (high-frequency power, ms^2)	SD; BAR	33.18; 0.247	16.41; 0.13	2.02; 1.9