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Table 1 Measures for the Mindfulness and Support Group Subjects

From: Mindfulness for irritable bowel syndrome: protocol development for a controlled clinical trial

Construct Measure Administration
Primary Outcome measure
Symptom Severity Irritable Bowel Symptom Severity Scale Pre, 2 wk, 3 mo, 6 mo, 12 mo post
Secondary Outcome measures
Symptom frequency Daily Symptom Diary Daily during the intervention and for 2 weeks post
IBS-related anxiety Visceral Sensitivity Index Pre, 2 wk, 3 mo, 6 mo, 12 mo post
Economic impact of IBS The Work Productivity and Activity Impairment for IBS (WPAI: IBS) Pre, 2 wk, 3 mo, 6 mo, 12 mo post
Co-Morbid Symptoms Recent Physical Symptoms Questionnaire (RPSQ) Pre, 2 wk, 3 mo, 6 mo, 12 mo post
General psychological distress Brief Symptom Inventory (BSI) Pre, 2 wk, 3 mo, 6 mo, 12 mo post
Anger and its expression The State-trait Anger Expression Inventory (STAXI) Pre, 2 wk, 3 mo, 6 mo, 12 mo post
Maladaptive coping methods Coping Strategies Questionnaire (CSQ) Pre, 2 wk, 3 mo, 6 mo, 12 mo post
Quality of life specific to IBS IBS-QOL Pre, 2 wk, 3 mo, 6 mo, 12 mo post
Effect modification measures
Expectancy of success of intervention Borkovec and Nau credibility scales Prior to second session
Catalogue of distressing prior events Family Inventory of Life Events (FILE) Pre intervention only
Demographics Age, race, education, marital status, income Pre intervention only
Process measures
Measure of mindfulness: Multiple constructs Five Facet Mindfulness Questionnaire (FFMQ) Pre, 2 wk, 6 mo, 12 mo post
Measure of mindfulness: Acceptance construct Toronto Mindfulness Scale Pre, 2 wk, 6 mo, 12 mo post