Table 4. Multivariable analysis of independent demographics, clinical, and patient-reported clinical outcome, and psychosocial predictors of longitudinally obtained FSS scores.

	Regression coefficient (95% CI)	p-value
VAS* for pain	0.04 (0.01, 0.07)	0.006
IBQ**	0.05 (0.03, 0.07)	<0.001
Medsger Severity Index - GI tract	0.2 (0.05, 0.35)	0.009

*VAS: Visual Analogue Scale.

**IBQ: Illness behavior questionnaire.