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OBJECTIVE: Behçet's disease (BD) is a chronic, multisystem disorder that can cause severe morbidity and mortality. Monitoring tools that measure disease activity are required for effective management of BD. We aimed to investigate the association of prognostic nutritional index (PNI) with disease activity in BD. METHODS: In this cross-sectional study, we enrolled 88 adult patients with BD and 51 healthy controls. The patients were divided into patients with active and inactive BD according to their disease activities. PNI was calculated using the following formula: 10×serum albumin (g/dL)+0.005×peripheral lymphocyte count (per mm3). To evaluate BD activity, the Behçet Disease Current Activity Form was used. The relations of BD activity with PNI, neutrophil-to-lymphocyte ratio, platelet-to-lymphocyte ratio, erythrocyte sedimentation rate, and C-reactive protein were investigated. A receiver operator characteristic curve analysis was used to define the optimum cutoff value of PNI for active BD. RESULTS: A total of 48 patients were classified as having active BD and 40 as having inactive BD. Patients with active BD had lower mean PNI than patients with inactive BD and healthy controls (51.8±4.2, 57.4±2.9, and 56.6±3.6, respectively; p<0.001). In multivariate analysis, PNI was the only independent predictor of BD activity (odds ratio, -0.687; 95% confidence interval 0.548-0.861; p=0.001). The optimum cutoff of PNI for active BD was 55.35 with 79.2% sensitivity and 77.75% specificity. CONCLUSION: PNI was significantly associated with BD activity. PNI may be a useful tool for the assessment of disease activity in BD.
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INTRODUCTION: More than 50% of glomerular crescent formation is required for a diagnosis of crescentic glomerulonephritis in a kidney biopsy. Although treatment protocols have been established for diffuse crescentic glomerulonephritis, there is no standard treatment for patients with fewer crescents in renal biopsies. In this study the importance of crescent percentage and clinical features on renal survival independent of underlying disease was investigated. METHODS: This retrospective observational study was conducted between 2013 and 2017. Forty-nine patients with crescent formation in their kidney biopsies were evaluated. We compared clinicopathological features and renal survival. We evaluated the factors affecting the course of end stage renal disease (ESRD). RESULTS: A total of 49 patients (57% male and median age 49 years) were enrolled in this study. 39% of patients developed ESRD at follow-up. Logistic regression analysis showed that the requirement for renal replacement treatment on admission (p < 0.001), serum creatinine level above 2.7 mg/dL (p < 0.001), the presence of more than 50% glomerulosclerosis (p = 0.04) and more than 34% crescent formation (p = 0.002) were significantly associated with ESRD. Kaplan-Meier survival analysis revealed that patients with less than 34% crescent in kidney biopsy and a serum creatinine level less than 2.7 mg/dL had increased kidney survival (log-rank test p: 0.01 and p: 0.002). CONCLUSION: Patients with crescent formation in kidney biopsy more than 34% should be evaluated for more aggressive treatment modalities regardless of the underlying disease, especially if the serum creatinine level is above 2.7 mg/dL.