Abstract
Patients with Crohn's disease or ulcerative colitis have relatively high levels of stress and psychological dysfunction. Acceptance and commitment therapy (ACT) is a psychological intervention that comprises acceptance and mindfulness procedures, along with commitment and behavior change strategies, to increase psychological flexibility and reduce stress. We performed a randomized controlled trial to investigate the effect of ACT on stress in patients with inflammatory bowel diseases (IBD). A total of 122 patients with quiescent or stable, mildly active IBD were randomly assigned to an 8-week ACT program or treatment as usual (control group). Clinical, demographic, disease activity, and psychological data and blood and feces were collected at baseline and at 8 weeks and 3 months after the intervention (week 20). Scalp hair was collected at baseline and week 20 for measurement of steroid concentrations. The primary endpoint was change in stress symptoms, assessed with the Depression Anxiety Stress Scale. Secondary endpoints included changes in perceived stress, anxiety, depression, quality-of-life domains, disease activity, and cortisol concentration in hair. Overall, 79participants were included in the complete case intention-to-treat analysis. There were 39% and 45% reductions in stressin the treatment group from baseline to 8 and 20 weeks, respectively, compared with 8% and 11% in the control group (group× time interaction, P= .001). ACT was associated with reduced perceived stress (P= .036) and depression (P= .010), but not anxiety (P=.388), compared with control individuals. In the intention-to-treat analysis, changes in all 4 quality-of-life domains overtime were similar in the ACT and control groups. In the per-protocol analysis, the overall well-being quality-of-life domain improved in the ACT group compared with the control group (P= .009). Subjective and objective disease activity measurements were similar between groups over the study period (all P values >.05). Hair cortisol concentrations correlated with stress (rs= 0.205, P= .050) and anxiety (rs=0.208, P= .046) at baseline but did not change significantly in the ACT group over the study period compared with the control group (P= .831). In a randomized controlled trial of patients with IBD, an 8-week ACTtherapy course improved stress and other indices ofpsychological health.ClinicalTrials.gov Identifier: NCT02350920.
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