title: Intersession reliability of self-selected and narrow stance balance testing in older adults.
abstract: BACKGROUND
  Despite the common practice of using force platforms to assess balance of older adults, few investigations have examined the reliability of postural screening tests in this population.
  
  
  OBJECTIVE
  We sought to determine the test-retest reliability of self-selected and narrow stance balance testing with eyes open and eyes closed in healthy older adults.
  
  
  METHODS
  Thirty older adults (>65 years) completed 45 s trials of eyes open and eyes closed stability tests using self-selected and narrow stances on two separate days (1.9 ± .7 days). Average medial-lateral center of pressure velocity was computed.
  
  
  RESULTS
  The ICC results ranged from .74 to .86, and no significant systematic changes (P < .05) occurred between the testing sessions for any of the tests. The standard error of measurement ranged from 15.9 to 23.6%.
  
  
  CONCLUSIONS
  Reliability estimates were similar between the two stances and visual conditions assessed. Slightly higher coefficients were identified for the self-selected stances compared to the narrow stances under both visual conditions; however, there were negligible differences between the sessions. The within subject session-to-session variability provides a basis for further research to consider differences between fallers and non-fallers.
  
  
  CONCLUSIONS
  Reliability for eyes open and closed balance testing using self-selected and narrow stances in older adults was established which should provide a foundation for the development of fall risk screening tests.
authors.affiliation: Biodynamics and Human Performance Center, Department of Health Sciences, Armstrong State University, 11935 Abercorn Street, Savannah, GA, 31419, USA. Bryan.Riemann@armstrong.edu.
authors.forename: Bryan L
authors.identifier: http://orcid.org/0000-0003-1850-0372
authors.initials: BL
authors.lastname: Riemann
authors.affiliation: Biodynamics and Human Performance Center, Department of Health Sciences, Armstrong State University, 11935 Abercorn Street, Savannah, GA, 31419, USA.
authors.forename: Kelsey
authors.initials: K
authors.lastname: Piersol
mesh_terms: D000058:Accidental Falls / Q000517:prevention & control; D000328:Adult; D000368:Aged; D000375:Aging / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008403:Mass Screening / Q000379:methods; D004856:Postural Balance / Q000502:physiology*; D015203:Reproducibility of Results
keywords: Center of pressure; Fall risk; Postural stability; Posturography