title: Relationship between flexible flat foot and developmental hip dysplasia.
abstract: OBJECTIVE
  To evaluate the possible relationship between flexible flat foot and developmental hip dysplasia in children between six and 15 years of age.
  
  
  METHODS
  Cross-sectional study including 65 patients that had undergone surgery due to residual hip dysplasia or hip dislocation and compared against 75 healthy patients. Flexible flat foot prevalence was measured in each group, with the results showing that 61% of the group with residual hip dysplasia or hip dislocation had this condition, vs. 12% in the healthy group. The statistical analysis shows that the chances of suffering from flexible flat foot, are five times greater in the hip dysplasia or hip dislocation group, than in the healthy group.
  
  
  CONCLUSIONS
  There is no evidence in the literature showing a relationship between these two conditions, even though they have a common etiology. This study shows a potential measurable relation between this two conditions.
  
  
  CONCLUSIONS
  Patients with hip dysplasia or dislocation may have a higher chance of presenting flexible flat foot during late childhood, adolescence and adulthood, a fact that suggests a relationship between these two pathologies. Also, patients who seek assistance for the first time because of a flexible flat foot condition without having been evaluated during the first year of life for hip dysplasia, would be better off if evaluated for residual hip dysplasia.
authors.affiliation: Departamento de Ortopedia, Instituto de Ortopedia Infantil Roosevelt, Bogotá, Colombia. Electronic address: cataponce@gmail.com.
authors.forename: M C
authors.initials: MC
authors.lastname: Ponce de León Samper
authors.affiliation: Departamento de Ortopedia, Instituto de Ortopedia Infantil Roosevelt, Bogotá, Colombia.
authors.forename: G
authors.initials: G
authors.lastname: Herrera Ortiz
authors.affiliation: Epidemiología, Instituto de Ortopedia Infantil Roosevelt, Bogotá, Colombia.
authors.forename: C
authors.initials: C
authors.lastname: Castellanos Mendoza
mesh_terms: D000293:Adolescent; D016022:Case-Control Studies; D002648:Child; D003430:Cross-Sectional Studies; D005260:Female; D005413:Flatfoot / Q000453:epidemiology / Q000209:etiology*; D006618:Hip Dislocation, Congenital / Q000150:complications* / Q000601:surgery; D006801:Humans; D008297:Male; D015995:Prevalence; D012307:Risk Factors
keywords: Flat foot; Hip dislocation; Joint laxity; Laxitud articular; Luxación de la cadera; Pie plano