title: Evaluation of body mass index as a prognostic factor in osteoarthrosis of the knee.
abstract: OBJECTIVE
  To evaluate the relationship between patients' body mass index (BMI) and the degree of radiographic severity of knee osteoarthrosis.
  
  
  METHODS
  117 patients with gonarthrosis were evaluated prospectively. The patients' BMI was calculated and their knee arthrosis was classified in accordance with the modified Ahlbäck criteria. Kruskal-Wallis analysis of variance (ANOVA) was used to evaluate the relationship between these two variables.
  
  
  RESULTS
  The group classified as Ahlbäck grade V had significantly higher BMI than the others.
  
  
  CONCLUSIONS
  There is a direct relationship between BMI and the degree of radiographic severity of gonarthrosis. Obesity appears to be directly related to the progression of knee osteoarthrosis.
authors: Hospital Santa Teresa, Petrópolis, RJ, Brazil.
authors: Fabrício Bolpato
authors: FB
authors: Loures
authors: Hospital Santa Teresa, Petrópolis, RJ, Brazil.
authors: Rogério Franco
authors: RF
authors: de Araújo Góes
authors: Hospital Santa Teresa, Petrópolis, RJ, Brazil.
authors: Pedro José
authors: PJ
authors: Labronici
authors: Instituto Nacional de Traumatologia e Ortopedia (Into), Rio de Janeiro, RJ, Brazil.
authors: João Maurício
authors: JM
authors: Barretto
authors: Universidade Federal Fluminense, Niterói, RJ, Brazil.
authors: Beni
authors: B
authors: Olej
keywords: Arthroplasty; Knee; Obesity; Osteoarthrosis