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Table 2 Heart rate variability analyses in time domain according to the presence of peripheral vascular disease

From: Cardiovascular autonomic neuropathy in type 2 diabetes mellitus patients with peripheral artery disease

 

With PAD

Without PAD

P*

n

24

43

-

Mean RR 24-h (ms)

767 ± 79

776 ± 92

0.98

Mean RR day (ms)

652 ± 263

738 ± 145

0.55

Mean RR night (ms)

811 ± 99

841 ± 93

0.41

SDNN 24-h (ms)

87 ± 35

105 ± 27

0.009

SDNN day (ms)

75.7 ± 34.2

92 ± 30,7

0.001

SDNN night (ms)

82.2 ± 39.1

96 ± 33.5

0.002

SDANN 24-h (ms)

3.54 ± 6.33

3.95 ± 5.6

0.16

SDANN day (ms)

3.42 ± 6.43

3.81 ± 0.6.3

0.02

SDANN night (ms)

3.86 ± 7.08

5.16 ± 7.7

0.13

SDNNi 24-h (ms)

18.4 ± 11.4

21.3 ± 12.9

0.002

SDNNi day (ms)

17.6 ± 11.7

20.1 ± 12.1

0.001

SDNNi night (ms)

19.7 ± 11.7

81.9 ± 37.5

0.004

RMSSD 24-h(ms)

28.5 ± 11.8

38.3 ± 13.7

0.16

RMSSD day (ms)

27.3 ± 11.3

36.9 ± 13.8

0.21

RMSSD night (ms)

30.6 ± 14.2

42.2 ± 16.1

0.15

PNN50 24-h (%)

76.4 ± 29.3

87.8 ± 25.9

0.19

PNN50 day (%)

63.4 ± 29.9

76.7 ± 26.6

0.23

PNN50 night (%)

67.7 ± 31.5

73.0 ± 27.5

0.22

  1. Data were log transformed before analyses and then expressed as mean ± SD.
  2. PAD = peripheral arterial disease; SDNN = SD of the R-R intervals, SDNNi = mean of the SD of R-R intervals calculated in 5-min segments, SDANNi = SD of the averages of the R-R intervals calculated in 5-min segments; RMSSD = root mean square of successive differences of adjacent R-R intervals; (PNN50) = percentage of differences between adjacent R-R intervals >50 ms;
  3. * Student’s t-test.
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