title: [A clinical predictor index for renal survival].
abstract: BACKGROUND
  A clinical index that discriminates disease progression independent of histopathologic features may be valuable in the best timing of biopsy.
  
  
  OBJECTIVE
  This study addresses the question if a clinical index based on cortical echogenicity, renal length to body height ratio (KL/H), and serum creatinine levels predicts renal survival.
  
  
  METHODS
  The study enrolled 154 patients. Biopsy specimens were graded for chronic (glomerular obsolescence, segmental glomerular sclerosis, tubular atrophy and interstitial fibrosis) and acute (mesangial proliferation, leucocyte permeation, crescent and fibrinoid necrosis and interstital infiltrate) index by the sum of scored lesions. A chronic clinical index was created by the sum of scored cortical echogenicity relative to liver or spleen, creatinine serum levels and KL/H. The study end point was start on dialisis.
  
  
  RESULTS
  Higher grade of chronic clinical and biopsy indices were associated with poorer long-term renal survival. Five out of six patients with serum creatinine levels > 2.5mg/dL, highest cortical echogenicity and KL/H < 0.60, before biopsy, started on dialysis and one increased creatinine levels up to 4.5 mg/dL. The chronic clinical index correlates well with chronic biopsy index.
  
  
  CONCLUSIONS
  The chronic clinical index could be useful to predict a clinical setting in which a renal biopsy will show advanced chronic and irreversible lesion. In patients with highest grade of clinical parameters renal biopsy can be obviate. As a chronicity of illness index for groups of patients with renal medical diseases, the system could be useful in outcome comparisons and evaluation of therapeutic efficacy.
authors: Serviço de Nefrologia, Hospital Universitário Pedro Ernesto, Universidade do Estado do Rio de Janeiro.
authors: Nordeval Cavalcante
authors: NC
authors: Araújo
authors: Lilimar da Silveira
authors: Lda S
authors: Rioja
authors: Maria Alice Puga
authors: MA
authors: Rebelo
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001706:Biopsy; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D007674:Kidney Diseases / Q000000981:diagnostic imaging* / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009929:Organ Size; D011446:Prospective Studies; D012720:Severity of Illness Index; D014463:Ultrasonography; D055815:Young Adult