Analysis of a Pulse Rate Variability Measurement Using a Smartphone Camera

Table 2

HRV and PRV index comparisons can be found in the corresponding literature (in parentheses). PC stands for the Pearson correlation coefficient (with the values), and bias, SD, and BAR values are the results of the Bland-Altman analysis. The definitions of the HRV indices were introduced by us earlier.

Derived index comparison	Cited value	Our value
SDNN-PC ([12])	0.933	0.999
SDNN-BAR ([12])	19.17%	3.5%
RMSSD-PC ([12])	0.78	0.996
RMSSD-BAR ([12])	42.22%	10.6%
pNN50-PC ([12])	0.5	0.993
pNN50-BAR ([12])	79.91%	30.6%
LP-PC ([12])	0.996	0.999
LP-BAR ([12])	12.14%	8.9%
HP-PC ([12])	0.996	0.995
HP-BAR ([12])	10.22%	25.6%
LP/HP-PC ([12])	0.982	0.941
LP/HP-BAR ([12])	19.3%	73.6%
avg(PP)-PC ([13])	0.993	1
avg(PP)-bias ([13])	−0.05 beats/min	0.032 beats/min
avg(PP)-SD ([13])	1.03 beats/min	0.11 beats/min
ln(RMSSD)-bias ([21])	0.94	0.103
ln(RMSSD)-SD ([21])	1.77	0.153