Table 3 Heart rate variability analysis

From: Decreased neuroautonomic complexity in men during an acute major depressive episode: analysis of heart rate dynamics

 

Healthy ( N =20)

Depressed ( N =25)

P -value

AVNN (sec)

1.04 (0.82–1.22)

0.94 (0.81–1.29)

0.002

SDNN (sec)

0.10 (0.06–0.17)

0.10 (0.06–0.14)

n.s.

SDANN (sec)

0.07 (0.04–0.12)

0.06 (0.04–0.10)

n.s.

SDNNINDX (sec)

0.08 (0.05–0.11)

0.06 (0.03–0.10)

0.02

rMSSD (sec)

0.05 (0.02–0.09)

0.04 (0.01–0.09)

n.s.

pNN10

0.82 (0.59–0.89)

0.73 (0.14–0.89)

0.05

pNN25

0.59 (0.22–0.76)

0.45 (0.01–0.75)

n.s.

pNN50

0.25 (0.02–0.54)

0.15 (0.00–0.51)

n.s.

TOTPWR (sec2)

0.013 (0.004–0.035)

0.010 (0.004–0.022)

n.s.

ULF (sec2)

0.006 (0.001–0.019)

0.004 (0.002–0.012)

n.s.

VLF (sec2)

0.004 (0.001–0.009)

0.003 (0.001–0.007)

0.01

LF (sec2)

0.002 (0.001–0.004)

0.001 (0.000–0.003)

0.04

HF (sec2)

0.001 (0.000–0.003)

0.001 (0.000–0.003)

n.s.

LF/HF

1.590 (0.646–4.076)

1.981 (0.431–11.18)

n.s.

β exponent

−0.94 (−0.74 to −1.28)

−0.92 (−0.75 to −1.15)

n.s.

  1. Abbreviations: AVNN, average of all the normal sinus to normal sinus intervals; HF, high frequency; LF, low frequency; n.s., nonsignificant; pNN10, percentage of adjacent intervals whose difference is higher than 10 ms; pNN25, percentage of adjacent intervals whose difference is higher than 25 ms; pNN50, percentage of adjacent intervals whose difference is higher than 50 ms; rMSSD, root mean square of consecutive differences between adjacent NN intervals; SDANN, s.d. of averages of NN intervals in all 5-min segments; SDNN, s.d. of all NN intervals; SDNNINDX, mean of the s.d. of NN intervals in all 5-min segments; TOTPWR, total spectral power; ULF, ultra-low frequency; VLF, very-low frequency.
  2. Results are indicated as median and (minimum–maximum) range.
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