title: [Relationship between unipedal stance test score and center of pressure velocity in elderly].
abstract: BACKGROUND
  Frequent falls are one of the most important health problems in the elderly population. The unipedal stance test (UPST), asses postural stability and is used in fall risk measures. Despite this, there is little information about its relationship with posturographic parameters (PP) that characterizes postural stability. Center of pressure velocity (CoPV) is one of the best PP that describes postural stability. The aim of this study was to analyze the relation between UST score and CoPV in elderly population.
  
  
  METHODS
  A sample of 38 healthy elderly subjects where divided in two groups according to their UPST score, low performance (LP, n=11) and high performance (HP, n=27). The correlation between UPST score and COP mean velocity (CoPmV), recorded from a posturographic test, was analyzed between both groups.
  
  
  RESULTS
  An inverse correlation between UPST score and CoPmV was found in both groups. However, this was higher in the LP group (r=-0.69, P=.02) compared to the HP (r=-0.39, P=.04).
  
  
  CONCLUSIONS
  Based on the results of this investigation, it may be concluded that the achievement on UPST has an inverse relationship with CoPmV, especially in subjects with low performance in the UPST.
authors.affiliation: Centro de Estudios del Movimiento Humano, Escuela de Kinesiología, Universidad Mayor, Santiago, Chile. rodrigoguzmanvenegas@gmail.cl
authors.forename: Guzmán
authors.initials: G
authors.lastname: Rodrigo Antonio
authors.forename: Silvestre
authors.initials: S
authors.lastname: Rony
authors.forename: Rodríguez
authors.initials: R
authors.lastname: Francisco Aniceto
authors.forename: Arriagada
authors.initials: A
authors.lastname: David Andrés
authors.forename: Ortega
authors.initials: O
authors.lastname: Pablo Andrés
mesh_terms: D000368:Aged; D001696:Biomechanical Phenomena; D005260:Female; D015577:Geriatric Assessment; D006801:Humans; D008297:Male; D010808:Physical Examination; D004856:Postural Balance / Q000502:physiology*; D011312:Pressure