Table 3.

The mean score of 11 somatic complaints from the SSC in subjects with and without IBS

SSC items	IBS (n=106)	Non-IBS (n=355)	Overall (n=461)	P valuea
Overall SSC score	0.7±0.5	0.5±0.5	0.6±0.5	<0.001
Headache	1.3±1.0	0.7±0.9	0.8±1.0	<0.001
Backache	1.2±1.1	0.9±1.2	1.0±1.2	0.001
Asthma	0.1±0.6	0.1±0.5	0.1±0.6	0.73
Insomnia	1.0±1.2	0.7±1.1	0.8±1.1	<0.001
High blood pressure	0.2±0.6	0.2±0.6	0.2±0.6	0.25
Fatigue	1.4±1.2	0.9±1.1	1.1±1.2	<0.001
General stiffness	1.1±1.2	0.9±1.2	1.0±1.2	0.002
Heart palpitations	0.3±0.6	0.2±0.6	0.2±0.6	0.06
Eye pain	0.4±1.0	0.2±0.6	0.2±0.7	0.002
Dizziness	0.5±0.9	0.4±0.9	0.4±0.9	0.01
Weakness	0.3±0.7	0.3±0.9	0.3±0.9	0.26

IBS, irritable bowel syndrome; SSC, Somatic Symptom Checklist.

All subscales rated on a 5-point scale anchored by (0) not at all and (4) extremely.

^aFrom a logistic regression model to predict IBS, adjusting for age and gender.