Table 2 Comparison of each variable between IBS patient, non-patient IBS, and control groups after adjusting for age

CS-FBD (25 items)

103.5

(30.2)

78.6

(25.1)

57.1

(21.9)

29.01

< 0.001

0.216

CS-FBD (23 items)

93.7

(29.2)

69.8

(24.6)

49.4

(20.7)

28.40

< 0.001

0.213

IBS-BRQ (26 items)

84.7

(32.4)

62.4

(22.8)

46.7

(19.8)

21.91

<0.001

0.173

IBS-BRQ (18 items)

60.2

(24.0)

42.2

(17.0)

30.0

(14.2)

24.50

<0.001

0.189

IBS-SI

193.3

(109.7)

193.9

(80.7)

116.1

(86.6)

18.96

< 0.001

0.153

Disruption to daily life (IBS-SI)

56.9

(30.4)

43.4

(25.3)

25.4

(27.0)

11.58

< 0.001

0.101

VSI

52.4

(14.7)

23.2

(19.8)

13.6

(17.0)

22.69

< 0.001

0.197

DAS

92.1

(24.4)

93.1

(24.5)

87.3

(20.7)

3.50

0.032

0.033

HADS (Anxiety)

7.4

(4.8)

7.3

(3.6)

6.4

(3.8)

2.73

0.067

0.026

HADS (Depression)

5.3

(4.8)

4.8

(3.0)

4.9

(3.8)

0.21

0.811

0.002

HADS (Total)

12.7

(9.1)

12.1

(6.0)

11.3

(7.0)

1.08

0.342

0.010

SASS

29.9

(7.8)

35.9

(6.4)

37.4

(6.5)

6.24

0.002

0.058