Development of a new characteristic parameter – waveform index of finger blood volume pulse

Figures & data

Figure 1. F-BVP divided by the maximum point. The abscissa is time; the ordinate is the amplitude of F-BVP. Q(t) indicates F-BVP waveform; T indicates full cardiac cycle time; T_m indicates the time of the maximum point of F-BVP waveform; Q_max, Q_min, and Q_m indicate the maximum, minimum, and the mean values of the F-BVP waveform, respectively; Q_m1 and Q_m2 are the mean value of the F-BVP waveform before and after the maximum point, respectively; S₁ and S₂ represent the areas under the two parts of the waveform divided by the maximum point.

Table 1. The basic characteristics of the subjects.

Group	Male/female	Age	Systolic BP(mmHg)	Diastolic BP(mmHg)
Negative	216/239	20.8 ± 6.8	115.5 ± 8.7	72.4 ± 7.2
Positive	269/206	53.8 ± 14.1	128.6 ± 18.6	76.5 ± 11.6
p Value	–	p < .01	p < .01	p < .01

Figure 2. Receiver operating characteristic (ROC) curve of waveform index (WI).

Figure 3. Box-plot figure of waveform index (WI) with the increase of age.

Figure 4. Box-plot figure of waveform index (WI) with the increase of systolic blood pressure.