Table 2 Comparison between the patient group and control group

RR mean (ms)

912.552 ± 115.765

928.028 ± 123.060

–0.13 (–0.45 ∼ 0.19)

0.311

SDNN (ms)

58.664 ± 35.492

62.661 ± 30.993

–0.12 (–0.44 ∼ 0.20)

0.286

RMSSD (ms)

50.439 ± 36.767

56.001 ± 28.405

–0.17 (–0.49 ∼ 0.15)

0.023

PNN50 (%)

12.065 ± 10.333

17.815 ± 8.878

–0.60 (–0.92 ~ − 0.27)

< 0.001

HF (log)

5.015 ± 0.432

5.281 ± 0.335

–0.69 (–1.01 ~ − 0.36)

< 0.001

LF (log)

4.385 ± 0.389

4.589 ± 0.236

–0.63 (–0.96 ~ − 0.31)

< 0.001

TP (log)

5.198 ± 0.385

5.439 ± 0.279

-0.72 (-1.04 ~ -0.39)

< 0.001

LF/HF

0.876 ± 0.053

0.871 ± 0.043

0.10 (–0.21 ∼ 0.42)

0.640

C1_d

0.487 ± 0.026

0.521 ± 0.023

–1.38 (–1.74 ~ -1.03)

< 0.001

C2_d

0.494 ± 0.018

0.476 ± 0.014

1.11 (0.77 ∼ 1.45)

< 0.001