Table 1 List of Online-Diary Items included in the time series analysis
Items implemented in the online diary | |
|---|---|
Somatic variables | |
Abdominal pain (AP) | “How severe is your abdominal (tummy) pain” → Adapted from the irritable bowel severity scoring system (IBS-SSS) [17] |
IBS associated daily impairment (DI) | “Please indicate how much your irritable bowel syndrome is affecting or interfering with your life today” → Adapted from the irritable bowel severity scoring system (IBS-SSS) [17] |
Psychological variables | |
Nervousness (N) | “Today, how much were you distressed by nervousness or shakiness inside?” → Adapted from the brief symptom inventory (BSI) [18] |
Tension (T) | “Today, how much were you distressed by feeling tense or keyed up” → Adapted from the brief symptom inventory (BSI) [18] |
Depressiveness (D) | “Today, how often have you been bothered by feeling down, depressed, or hopeless?” → Adapted from the Patient-Health-Questionnaire (PHQ) [19] |
Pain associated discomfort (PD) | “Today, how much have you been bothered by stomach pain” → Adapted from the Patient-Health-Questionnaire (PHQ) [20] |
Coping strategies | |
Catastrophizing (C) | “Today, when experiencing IBS-pain you had the feeling that you couldn’t go on” → Adapted from the coping strategies questionnaire (CSQ) [21] |
Hopelessness (H) | “When you had IBS-pain today, you thought: “It’s terrible and I feel it’s never going to get any better” → Adapted from the coping strategies questionnaire (CSQ) [21] |
Coping: positive thoughts (CPT) | “Today, when experiencing IBS-pain I thought of things I enjoy doing” → Adapted from the coping strategies questionnaire (CSQ) [21] |
Coping: Imagining pain outside the body (CIP) | “When experiencing IBS-pain, today I imagined that the pain is outside of my body” → Adapted from the coping strategies questionnaire (CSQ) [21] |