Autonomic parameters

Mean ± SD

Median (IQR)

P value

IBS-D

(n = 20)

IBS-C

(n = 20)

Control

(n = 20)

Para Sympathetic

(coefficient)

RRIV

7.7 ± 8.3

4.1 (2.3 - 10.8)

9 ± 10.9

4.8 (2.5 - 8.3)

8.5 ± 8.2

4.5 (3.3 - 10.5)

0.875

RRIV-D

18.5 ± 10.8

19.7 (12.1 - 27)

28.1 ± 24.1

20.1 (9.5 - 5.8)

19.7 ± 13.5

15.1 (11.2 - 26.8)

0.657

Sympathetic

SSR in seconds

2.5 ± 1.6

1.8 (1.2 - 4.1)

1.3 ± 0.5

1.3 (1 - 1.5)

1.8 ± 1.6

1.3 (1 - 1.7)

0.079