Table 3 Heart rate variability during 4-h hemodialysis between short and long interdialytic interval in overall population.

From: Effects of interdialytic interval on heart rate variability in chronic hemodialysis patients: a cross-sectional study

HRV parameters

Total (N = 163)

P value*

Short interdialytic interval

Long interdialytic interval

Mean NN (ms)

869.8 ± 136.0

864.8 ± 132.8

0.369

SDNN (ms)

49.1 ± 21.5

49.3 ± 23.7

0.946

SDANN (ms)

40.0 ± 18.1

38.6 ± 19.9

0.714

rMSSD (ms)

21.2 ± 16.8

22.3 ± 24.1

0.805

pNN50 (%)

4.6 ± 10.1

4.2 ± 8.5

0.952

VLF (ms2)

15.4 ± 8.3

15.6 ± 9.0

0.916

LF (ms2)

9.9 ± 7.8

10.0 ± 8.0

0.756

LF normalized unit (n.u.)

51.9 ± 10.8

52.5 ± 10.8

0.381

HF (ms2)

8.6 ± 6.5

8.5 ± 6.1

0.960

HF normalized unit (n.u.)

48.1 ± 10.8

47.5 ± 10.8

0.381

LF/HF ratio

1.2 ± 0.5

1.2 ± 0.5

0.681

  1. *P < 0.05 from the comparison between short interdialytic interval and long interdialytic interval using unpaired.