Table 4: HRV parameters for healthy controls and acute and chronic tinnitus patients.

HRV parameter

Healthy controls

Tinnitus patients

value

Acute

Chronic

TP (ms^{2})

7.49 ± 0.99

6.99 ± 1.23

6.86 ± 1.09

0.063

VLF (ms^{2})

6.37 ± 0.92

6.18 ± 1.32

6.01 ± 1.12

0.461

LF (ms^{2})

5.98 ± 1.19

5.52 ± 1.36

5.56 ± 1.22

0.288

HF (ms^{2})

6.41 ± 1.19^{a}

5.31 ± 1.34^{b}

4.97 ± 1.52^{b}

0.000**

LF/HF

0.94 ± 0.11^{a}

1.85 ± 2.13^{a, b}

3.05 ± 4.32^{b}

0.007*

HRV data were log-transformed prior to statistical analysis. The values given are the mean ± SD. Statistical significance was set at a value < 0.05, using analysis of variance (ANOVA). If there were statistically significant differences between groups, the post hoc test (Duncan) was used to identify them with “^{a, b}”. TP: total power; VLF: very low frequency; LF: low frequency; HF: high frequency; LF/HF: ratio of absolute LF to HF power; *; **.