Digital Behavioral Interventions in Inflammatory Bowel Disease

Level of psychological distress in participants over the prior 7 days was measured by combining the sub-score domains of anxiety and depression from the National Institutes of Health Patient Reported Outcomes Measurement Information System-29 (PROMIS-29) assessment tool. PROMIS-29 is a 29-item form that includes 4 questions in each of the domains of anxiety and depression. Group mean scores of these 8 items are composited. Higher scores indicate a greater level of the measured trait, and raw scores are converted to a T-score that centers at a mean of 50 with a standard deviation of 10 in the general population.

Disease activity over the prior 7 days for Crohn's disease patients will be measured using the Short Crohn's Disease Activity Index (sCDAI). The sCDAI consists of three variables identified as predictors of disease activity: diarrhea frequency (number of liquid or soft stools), abdominal pain, and general well-being. Scoring was calculated as follows to calculate an overall score: 44 + (2 x the number of liquid or soft stools each day for 7 days) + 5 x the sum of seven daily abdominal pain ratings (0 = none, 1 = mild, 2 = moderate, 3 = severe) + 7 x the sum of seven general well-being ratings (0 = generally well, 1 = slightly under par, 2 = poor, 3 = very poor, 4 = terrible). Overall scoring ranged from 44 to an undefined upper limit based on diarrhea frequency with increasing scores being indicative of more Crohn's disease activity. Group scores were summarized using basic descriptive statistics.

Disease activity over the prior 7 days in Ulcerative Colitis patients will be measured using the Simple Clinical Colitis Activity Index (SCCAI). The SCCAI consists of five colitis activity symptom items (bowel frequency per day, bowel frequency per night, urgency of defecation, blood in stool, and general well-being) along with an assessment of extracolonic manifestations. Bowel frequency per night is scored on a 0-2 scale and General well being is scored on a 0-4 scale. The other 3 symptom scores are scored on a 0-3 scale. 1 point each is added for the presence of any extracolonic manifestation (i.e., uveitis, pyoderma gangrenosum, erythema nodusum, and arthropathy). Scores are summarized for an overall possible scoring range of 0-19 with increasing scores being indicative of more colitis activity. Group scores were summarized using basic descriptive statistics.

Level of perceived stress in IBD patients was measured using the NIH Toolbox Item Bank/Fixed Form v2.0. This form consists of 10 questions or statements used to assess perceptions of stress in IBD patients over the past month. Responses to the 10 items are scored on a 5-point Likert scale ranging from 1 ("Never") to 5 ("Very Often"). Raw scores are auto-converted to a T-score that centers at a mean score of 50 with a Standard Deviation (SD) of 10. Higher scores are indicative of higher levels of the trait (perceived stress). Group scores were summarized using basic descriptive statistics.

Health-related Quality-of-Life as measured by the overall National Institutes of Health Patient Reported Outcomes Measurement Information System-29