Can Red Cell Distribution Width Be Used as a Marker of Crohn's Disease Activity?

Recently, it has been suggested an association between red cell distribution width (RDW) and Crohn's disease activity index (CDAI), but its use is not yet performed in daily clinical practice. To determine whether RDW can be used as a marker of Crohn's disease (CD) activity. This was a cro...

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Published inGE Portuguese Journal of Gastroenterology Vol. 23; no. 1; pp. 6 - 12
Main Authors Oliveira, Ana Maria, Cardoso, Filipe Sousa, Rodrigues, Catarina Graça, Santos, Liliana, Martins, Alexandra, de Deus, João Ramos, Reis, Jorge
Format Journal Article
LanguageEnglish
Portuguese
Published Switzerland Elsevier España, S.L.U 01.01.2016
Karger Publishers
Sociedade Portuguesa de Gastrenterologia
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Summary:Recently, it has been suggested an association between red cell distribution width (RDW) and Crohn's disease activity index (CDAI), but its use is not yet performed in daily clinical practice. To determine whether RDW can be used as a marker of Crohn's disease (CD) activity. This was a cross-sectional study including patients with CD, observed consecutively in an outpatient setting between January 1st and September 30th 2013. Blood cell indices, erythrocyte sedimentation rate (ESR), and C-reactive protein were measured. CD activity was determined by CDAI (active disease if CDAI≥150). Associations were analyzed using logistic regression (SPSS version 20). 119 patients (56% female) were included in the study with a mean age of 47 years (SD 15.2). Twenty patients (17%) had active disease. The median RDW was 14.0 (13–15). There was an association between RDW and disease activity (p=0.044). After adjustment for age and gender, this association remained consistent (OR 1.20, 95% CI 1.03–1.39, p=0.016). It was also found that the association between RDW and disease activity was independent of hemoglobin and ESR (OR 1.36, 95% CI 1.08–1.72, p=0.01) and of biologic therapy (OR 1.19, 95% CI 1.03–1.37, p=0.017). A RDW cutoff of 16% had a specificity and negative predictive value for CDAI≥150 of 88% and 86%, respectively. In this study, RDW proved to be an independent and relatively specific marker of CD activity. These results may contribute to the implementation of this simple parameter, in clinical practice, aiming to help therapeutic decisions. Recentemente, tem vindo a ser sugerida uma associação entre o valor de RDW e a atividade da doença de Crohn (DC), mas a sua utilização não está ainda implementada na prática clínica diária. Determinar se o RDW pode ser utilizado como marcador de atividade da DC. Estudo transversal, em doentes com DC, observados consecutivamente em consulta de Doença Inflamatória Intestinal, entre 1 de janeiro e 30 de setembro de 2013. Analisaram-se índices do hemograma, proteína C reativa e velocidade de sedimentação. A gravidade da doença foi avaliada pelo Crohn's disease activity index (doença ativa se CDAI≥150). As associações foram estudadas usando a regressão logística (SPSS Statistics V20). Incluídos 119 doentes (56% do sexo feminino), com idade média de 47 anos (DP 15,2 anos). Vinte doentes (17%) tinham doença ativa. O valor do RDW mediano foi 14,0% (13-15). Verificou-se uma associação entre RDW e atividade da doença (p=0,044). Após ajuste para a idade e o sexo, esta associação manteve-se consistente (OR 1,20; 95% CI 1,03-1,39; p=0,016). Verificou-se ainda que a associação do valor do RDW com a atividade da doença foi independente do valor da hemoglobina e da velocidade de sedimentação (OR 1,36; 95% CI 1,08-1,72; p=0,01) e da terapêutica biológica (OR 1,19; 95% CI 1,03-1,37; p=0,017). Para um valor de corte de RDW de 16%, a especificidade e o valor preditivo negativo de CDAI≥ 150 foram de 88% e 86%, respetivamente. Neste estudo, o valor do RDW demonstrou ser um marcador independente e relativamente específico da atividade da doença de Crohn. Estes resultados poderão contribuir para a aplicação deste parâmetro simples, na prática clinica diária, visando auxiliar decisões terapêuticas.
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ISSN:2341-4545
2387-1954
DOI:10.1016/j.jpge.2015.10.003