JOURNAL ARTICLE

Severe paediatric ulcerative colitis: incidence, outcomes and optimal timing for second-line therapy

D Turner, C M Walsh, E I Benchimol, E H Mann, K E Thomas, C Chow, R A McLernon, T D Walters, J Swales, A H Steinhart, A M Griffiths
Gut 2008, 57 (3): 331-8
17981888

BACKGROUND: Despite the predominance of extensive disease in children with ulcerative colitis, data concerning severe paediatric ulcerative colitis are sparse. We reviewed rates and predictors of response to intravenous-corticosteroid therapy in a single-centre cohort with long-term follow-up.

METHODS: 99 children (49% males; age 2-17 years) were hospitalised (1991-2000) for treatment of severe ulcerative colitis (90% extensive; 49% new onset ulcerative colitis). Clinical, laboratory and radiographic data were reviewed. A population-based subset was used to assess incidence. Predictors of corticosteroid response were analysed using univariate and multivariate analyses at days 3 and 5 of therapy. Colectomy rates were calculated using Kaplan-Meier survival analyses.

RESULTS: 28% (95% CI, 23 to 34%) of children with ulcerative colitis resident in the Greater Toronto Area required admission for intravenous corticosteroid therapy, of whom 53 (53%; 95% CI, 44 to 63%) responded. Several predictors were associated with corticosteroid failure, but in multivariable modelling only C-reactive protein [OR = 3.5 (1.4 to 8.4)] and number of nocturnal stools [OR = 3.2 (1.6 to 6.6)] remained significant at both days 3 and 5. The Pediatric Ulcerative Colitis Activity Index (PUCAI), Travis and Lindgren's indices strongly predicted non-response. Radiographically, the upper range of colonic luminal width was 40 mm in children younger than 11 years versus 60 mm in older patients. Cumulative colectomy rates at discharge, 1 year and 6 years were 42%, 58% and 61%, respectively.

CONCLUSIONS: Children with ulcerative colitis commonly experience at least one severe exacerbation. Response to intravenous corticosteroids is poor. The PUCAI, determined at day 3 (>45 points) should be used to screen for patients likely to fail corticosteroids and at day 5 (>70 points) to dictate the introduction of second-line therapies.

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