Revista Brasileira de Reumatologia (Oct 2005)
Impacto da atividade inflamatória e uso de glicocorticóide nas variáveis nutricionais da artrite idiopática juvenil Impact of inflammatory activity and glucocorticoid use in the nutritional variables of juvenile idiopathic arthritis
Abstract
OBJETIVO: avaliar o estado nutricional na artrite idiopática juvenil (AIJ), a influência da atividade inflamatória e o uso de glicocorticóide. MÉTODOS: foram estudados 116 pacientes com AIJ diagnosticados segundo os critérios da ILAR/1997. Subtipo e atividade da doença foram determinados por reumatologistas pediátricos, e a dose cumulativa de glicocorticóide foi revisada nos prontuários dos pacientes. Foram determinados os percentis do índice de massa corporal (IMC) e da prega cutânea tricipital (PCT) e o escore Z da estatura, de acordo com a OMS. Considerou-se baixo peso e baixa adiposidade quando o IMC e a PCT apresentavam-se abaixo do percentil 5. Baixa estatura foi definida por escore Z de estatura para idade menor do que -2. O nível sérico de IGF-1 foi medido por meio de radioimunoensaio. RESULTADOS: as prevalências de baixo peso, baixa adiposidade e baixa estatura foram 16,4%, 20,7% e 10,4%, respectivamente. Níveis séricos reduzidos de IGF-1 foram observados em 14 pacientes (12,1%). Os fatores negativamente associados com o escore Z da estatura na análise de regressão multivariável foram: duração da doença (coeficiente parcial de correlação, intervalo de confiança de 95%: -0,370, -0,527 a -0,188: pOBJECTIVE: To assess the nutritional status in juvenile idiopathic arthritis (JIA) and the influence of inflammatory activity and glucocorticoid use. METHODS: One hundred and sixteen patients were evaluated. Disease subtype and disease activity were defined by the attending physician, and the cumulative glucocorticoid dose was recorded by chart review. The percentiles of body mass index (BMI) and triceps skinfold (TSF) and the Z-score for height were determined: low weight and low adiposity were diagnosed when BMI and TSF were below the 5th percentile. Short stature was defined by a Z-score of height for age < -2. The serum level of IGF-I was measured by radioimmunoassay. RESULTS: The prevalences of low weight, low adiposity and short stature were 16.4%, 20.7% and 10.4%, respectively. Low IGF-1 serum level was found in 14 patients (12.1%). The factors negatively associated with the Z-score of height in multivariable regression analysis were disease duration (partial correlation coefficient, 95% confidence interval: -0.370, -0.527 to -0.188; p < 0.001), erythrocyte sedimentation rate (ESR) (-0.357, -0.516 to -0.174; p < 0.001), polyarticular or systemic subtype (-0.290, -0.459 to -0.100; p = 0.003), while there was no significant association with the cumulative dose of glucocorticoids (0.086, -0.111 to 0.277; p = 0.391). None of these variables were significantly associated with the percentiles of BMI or TSF, but patients with a systemic or polyarticular subtype tended to present lower percentiles of BMI (p = 0.051). CONCLUSIONS: Nutritional status is frequently compromised in JIA. The duration and subtype of the disease and the ESR are factors independently associated with short stature. The cumulative dose of glucocorticoids was not independently associated with short stature or other nutricional variables.
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