Prediction of symptomatic improvement after exposure-based treatment for irritable bowel syndrome

BMC Gastroenterology

Table 1 Pre-treatment characteristics and correlations with outcome variables

				Correlation with GSRS-IBS
	n	m	sd	Post-treatment	Follow-up
Outcome variables
GSRS-IBS at post-treatment		35.18	13.77		.53*
GSRS-IBS at follow-up		32.58	12.71	.53*
Demographic variables
Sex (male/female)	67/12			.14	-.17
Age		34.25	9.25	-.05	.03
Duration of IBS		13.70	11.10	.06	.07
University studies (yes/no)	52/27			-.19	-.04
Predictor variables
GSRS-IBS at pre-treatment		47.74	11.00	.50*	.30*
Study group (treatment/waiting list)	39/40			-.20	-.05
Any anxiety disorder (yes/no)	39/40			.15	.16
Major depressive disorder (yes/no)	15/62			.12	.27*
MADRS-S		11.20	7.99	.20	.36*
SSP-PSTA		2.56	0.69	.07	.17
SSP-STA		2.52	0.58	.03	.03
SCL-SOM		13.52	9.19	.17	.18
VSI		42.92	17.42	.21	.28*
CSQ-CAT		14.72	7.78	.35*	.32*
ASI		19.24	12.01	.25*	.17
IBS-QOL		52.45	20.57	-.41*	-.31*
SDS		12.13	8.28	.37*	.26*

*p < .05 for bivariate correlation between predictor and predicted GSRS-IBS score. GSRS-IBS Gastrointestinal Symptom Rating Scale – IBS Version, MADRS-S Montgomery Åsberg Depression Rating Scale - Self Report, SSP-STA Swedish Universites Scales of Personalities - Somatic Trait Anxiety subscale, SSP-STA Swedish Universites Scales of Personalities – Psychic Trait Anxiety subscale, SCL-SOM Symptom Checklist – Somatization subscale, VSI Visceral Sensitivity Index, ASI Anxiety Sensitivity Index, CSQ-CAT Coping Strategies Questionnaire – Catastrophizing subscale, IBS-QOL Irritable Bowel Syndrome Quality of Life Instrument, SDS Sheehan Disability Scales.

ISSN: 1471-230X