title: Does change in gait while counting backward predict the occurrence of a first fall in older adults?
abstract: BACKGROUND
  Dual-task-based assessment tests failed to establish a dependable relationship between dual-task-related gait changes and the risk of falls in the elderly.
  
  
  OBJECTIVE
  The aim of this study was to examine whether changes in gait while counting backward could be associated with the occurrence of a first fall among older adults.
  
  
  METHODS
  Walking while counting backward was investigated prospectively in a cohort of 187 older adults living independently in senior housing facilities. During enrollment, walking time, number of steps, and frequency of lateral line stepping-over and stops were measured while walking only and while walking with backward counting aloud. Information on the incident falls during the follow-up year was collected monthly.
  
  
  RESULTS
  Walking time and the number of steps increased significantly under the dual-task condition compared to the single-task condition among fallers and non-fallers (p < 0.001). Compared to non-fallers, fallers had significantly lower scores in the Mini-Mental State Examination (p = 0.029) and higher scores in the 15-item Geriatric Depression Scale (p = 0.003) and Timed Up & Go Test (p = 0.006) and increased walking time under both walking conditions (p = 0.030 for single-task condition and p = 0.007 for dual-task condition). After adjusting for these variables, depressive symptoms (adjusted OR = 2.6 with p = 0.041 and adjusted OR = 2.5 with p = 0.045 when walking time while walking only and walking with backward counting is considered, respectively) and walking time while walking only (OR = 2.3 with p = 0.032) were significantly associated with falls.
  
  
  CONCLUSIONS
  Dual-task-related gait changes were poorly associated with the occurrence of a first fall and provided no additional predictive value compared to gait performance under a single task, suggesting that changes in basic clinical gait parameters while counting backward are unsuccessful to predict the first fall among older adults.
authors.affiliation: Department of Geriatrics, Angers University Hospital, Angers, France. olbeauchet@chu-angers.fr
authors.forename: Olivier
authors.initials: O
authors.lastname: Beauchet
authors.forename: Gilles
authors.initials: G
authors.lastname: Allali
authors.forename: Cédric
authors.initials: C
authors.lastname: Annweiler
authors.forename: Gilles
authors.initials: G
authors.lastname: Berrut
authors.forename: Nabil
authors.initials: N
authors.lastname: Maarouf
authors.forename: François R
authors.initials: FR
authors.lastname: Herrmann
authors.forename: Véronique
authors.initials: V
authors.lastname: Dubost
mesh_terms: D000058:Accidental Falls / Q000517:prevention & control*; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000502:physiology*; D001288:Attention; D005260:Female; D005684:Gait; D006801:Humans; D008297:Male; D008433:Mathematics; D011237:Predictive Value of Tests; D011446:Prospective Studies; D011597:Psychomotor Performance; D018570:Risk Assessment