Table 2 Univariate analysis of PPG features between AF and non-AF subjects.

From: Identification of Atrial Fibrillation by Quantitative Analyses of Fingertip Photoplethysmogram

 

non-AF (n = 516)

AF (n = 150)

p value

Pulse interval

 Mean

0.797 ± 0.150

0.775 ± 0.134

0.093

 Standard deviation of mean

0.265. ± 0.289

0.375 ± 0.247

<0.001

 RMSSD of mean

0.357 ± 0.397

0.488 ± 0.324

<0.001

 Low frequency

0.012 ± 0.027

0.018 ± 0.051

0.075

 High frequency

0.016 ± 0.051

0.025 ± .093

0.111

 Sample entropy

0.874 ± 0.518

1.835 ± 0.581

<0.001

 Turning point ratio

0.487 ± 0.106

0.596 ± 0.054

<0.001

Systolic amplitude

 Mean

1.763E3 ± 254.505

1.376E3 ± 386.567

<0.001

 Standard deviation of mean

0.157 ± 0.106

0.316 ± 0.124

<0.001

 RMSSD of mean

0.180 ± 0.137

0.435 ± 0.169

<0.001

 Low frequency

3.049E4 ± 1.619E4

2.532E4 ± 1.947E4

0.001

 High frequency

1.707E4 ± 1.621E4

3.007E4 ± 2.908E4

<0.001

 Sample entropy

1.716 ± 0.620

2.320 ± 0.427

<0.001

 Turning point ratio

0.564 ± 0.086

0.672 ± 0.061

<0.001

  1. Values are mean ± standard deviation.
  2. AF: atrial fibrillation; RMSSD: root mean square of successive differences.
  3. Represented by the 2-minute analytic program.
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