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Treatment of Active Crohn's Disease with Exclusive and Partial Enteral Nutrition: A Pilot Study in Adults.

Background and Aim: Enteral nutrition (EN) is not commonly used for the treatment of adults with active Crohn's disease (CD), despite patient interest in nutrition-based alternatives to corticosteroids and evidence of efficacy in paediatric CD. The aim of this study was to assess the impact of 2 different EN regimens on disease symptoms, nutrition and inflammatory markers in young adults with active CD.

Methods: A prospective non-randomized pilot study of adults aged 16-40 years with active CD on endoscopy or imaging was undertaken. Patients were sequentially recruited to use 2 weeks of exclusive EN (EEN) followed by either 6 weeks of EEN or partial EN (PEN) with usual diet. Assessments of disease symptoms, nutrition and inflammatory markers were undertaken at baseline and throughout the treatment.

Results: Thirty-eight patients with active disease were recruited. Thirty-two (84$) patients completed 2 weeks of EEN and had significant improvements in disease symptoms ( p = 0.003), serum c-reactive protein (CRP; p = 0.005), insulin-like growth factor-1 ( p = 0.006) and faecal calprotectin (FC; p = 0.028). During the following 6 weeks, 21 patients continued EEN (14 [67$] completed treatment) and 11 patients used PEN (9 [82$] completed treatment). Initial improvements in symptoms, CRP and nutrition markers were sustained over the next 6 weeks on both treatments. FC non-significantly increased in 5 out of 9 patients who used PEN and at week 8 FC was greater than 500 µg/g in 9 out of 14 and 7 out of 9 patients who used exclusive or PEN respectively. There was no significant difference in clinical outcomes between the 2 groups at week 8.

Conclusion: Two weeks of EEN significantly improved disease symptoms, nutrition and inflammatory markers. Further treatment with exclusive or PEN maintained initial improvements.

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