Cuffless Blood Pressure Estimation Based on Data-Oriented Continuous Health Monitoring System

Table 1

Features for estimation.

Features	Description
a	a-wave height
b	b-wave height
c	c-wave height
d	d-wave height
e	e-wave height
Ta	Time elapsing from rise of APG to a-wave
Tb	Time elapsing from rise of APG to b-wave
Tc	Time elapsing from rise of APG to c-wave
Td	Time elapsing from rise of APG to d-wave
Te	Time elapsing from rise of APG to e-wave
b/a	Ratio of b to a
c/a	Ratio of c to a
d/a	Ratio of d to a
e/a	Ratio of e to a
APG index
PR	Pulse rate counted from the PW of the past 1 min
Height	Height from a preliminary questionnaire [m]
Weight	Weight from a preliminary questionnaire [kg]
Age	Age from a preliminary questionnaire
Sex	Sex from a preliminary questionnaire (male: 0, female: 1)