Psychologic

assessment

Mean ± SD

Median (IQR)

P value

IBS-D

(n = 20)

IBS-C

(n = 20)

Control

(n = 20)

P1

P2

P3

P4

EPQ scale

Psychotism

5.9 ± 2.3

6 (4 - 7)

6.1 ± 1.8

6 (5 - 7)

5.8 ± 2.1

5.5 (4 - 7.5)

0.817

0.601

0.946

0.565

Neuroticism

18.1 ± 3.5

19 (15.5 - 21)

20.4 ± 1.1

20.5 (20 - 21)

14.5 ± 3.8

15 (12 - 16.5)

<0.001

0.021

0.003

<0.001

Extraversion

7.9 ± 5.2

6.5 (4 - 11.5)

5.7 ± 3.4

5.5 (2.5 - 8)

13 ± 4

13 (10 - 16.5)

<0.001

0.222

0.002

<0.001

Lie

9.9 ± 2.7

9.5 (8.5 - 12)

11.3 ± 2.2

11 (10 - 12.5)

10.6 ± 2.5

10.5 (9 - 11.5)

0.110

0.129

0.435

0.170

Criminality

15.6 ± 2.1

15.5 (14 - 16.5)

17.1 ± 2

17 (16 - 18)

13 ± 3.7

11.5 (10 - 16)

0.001

0.013

0.014

0.001

HSCL-90

Psychoticism

14.7 ± 5.7

13.5 (11 - 18.5)

15.9 ± 5.1

15 (12.5 - 18)

7.8 ± 4

7 (5 - 9.5)

<0.001

0.481

<0.001

<0.001

Paranoia

9.4 ± 2.7

9 (8 - 11)

9.9 ± 2

10 (9 - 11)

6.4 ± 2.7

6 (4 - 9)

<0.001

0.206

0.003

<0.001

Phobic anxiety

8.4 ± 4.1

9 (5 - 10)

8.7 ± 4.1

8 (6 - 12)

3.3 ± 2.4

3 (2 - 4)

<0.001

0.664

<0.001

<0.001

Hostility

6.7 ± 3.1

6 (5 - 8)

7.1 ± 2.4

7 (5 - 9)

3.9 ± 0.8

4 (3 - 4)

<0.001

0.530

<0.001

<0.001

Anxiety

15.7 ± 5.5

16 (11.5 - 18.5)

18.2 ± 5.8

19 (14.5 - 22)

9.4 ± 3.4

10 (8 - 10.5)

<0.001

0.143

<0.001

<0.001

Depression

27.4 ± 7

27.5 (24.5 - 31)

29.3 ± 5.4

29.5 (28 - 31)

17.7 ± 4.2

19 (14 - 20)

<0.001

0.232

<0.001

<0.001

Interpersonal sensitivity

17.7 ± 5.4

20 (16.5 - 21)

19.5 ± 4.4

19 (17 - 21)

12.5 ± 3.8

13 (10 - 16)

<0.001

0.849

0.001

<0.001

Obsessive compulsive

19.9 ± 3.9

20 (19 - 22)

20.2 ± 3.4

20.5 (18 - 22)

13.9 ± 3.6

14.5 (13 - 16)

<0.001

0.744

<0.001

<0.001

Somatization

19.7 ± 8.4

17.5 (13.5 - 22)

20.7 ± 8.7

18 (15 - 25.5)

8.1 ± 3.5

8.5 (6 - 10.5)

<0.001

0.645

<0.001

<0.001