title: Height of the foot longitudinal arch and anterior cruciate ligament injuries.
abstract: OBJECTIVE
  To evaluate the association between the height of the medial longitudinal arch of the foot and non-contact injuries of the anterior cruciate ligament.
  
  
  METHODS
  One hundred and five patients were included in this case-control study. The case group consisted of 52 patients with non-contact injury of the anterior cruciate ligament. Fifty-three individuals with no history of symptoms regarding to feet or knees comprised the control group. An anthropometric assessment of the bony arch index was performed, which consisted of measuring the ratio of the height between the navicular bone to the ground and the distance from the most posterior support point of the calcaneus to the first metatarsal-phalangeal joint. Gender, height, weight, body mass index and the frequency of sports practice were also evaluated.
  
  
  RESULTS
  Subjects in the case group had significantly higher medial longitudinal arches than individuals in the control group.
  
  
  CONCLUSIONS
  Individuals with rupture of the anterior cruciate ligament had higher arches than the corresponding controls, suggesting an association between a high medial longitudinal arch of the foot and injury of the anterior cruciate ligament. Level of Evidence III, Case-Control Study.
authors.affiliation: Universidade Federal do Rio Grande do Sul, Faculdade de Medicina, Porto Alegre, RS, Brazil, Faculdade de Medicina da Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
authors.forename: Paulo César
authors.initials: PC
authors.lastname: de César
authors.affiliation: Universidade Federal do Rio Grande do Sul, Faculdade de Medicina, Porto Alegre, RS, Brazil, Faculdade de Medicina da Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
authors.forename: Jairo André de Oliveira
authors.initials: JA
authors.lastname: Alves
authors.affiliation: Universidade Federal do Rio Grande do Sul, Faculdade de Medicina, Porto Alegre, RS, Brazil, Faculdade de Medicina da Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
authors.forename: João Luiz Ellera
authors.initials: JL
authors.lastname: Gomes
keywords: Anterior cruciate ligament/injuries; Anthropometry; Foot