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J Am Geriatr Soc. 2007 Apr;55(4):570-6.

Multitasking: association between poorer performance and a history of recurrent falls.

Author information

1
Department of Epidemiology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA. kaf24@pitt.edu

Abstract

OBJECTIVES:

To examine the association between poorer performance on concurrent walking and reaction time and recurrent falls.

DESIGN:

Cross-sectional analysis.

SETTING:

Community.

PARTICIPANTS:

Three hundred seventy-seven older community-dwelling adults (mean age+/-standard deviation 78+/-3).

MEASUREMENTS:

Reaction times on push-button and visual-spatial decision tasks were assessed while seated and while walking a 20-m course (straight walk) and a 20-m course with a turn at 10 m (turn walk). Walking times were recorded while walking only and while performing a reaction-time response. Dual-task performance was calculated as the percentage change in task times when done in dual-task versus single-task conditions. A history of recurrent falls (> or = 2 vs < or = 1 falls) in the prior 12 months was self-reported. Multivariate logistic regression models were used to predict the standardized odds ratios (ORs) of recurrent falls history. The standardized unit for dual-task performance ORs was interquartile range/2.

RESULTS:

On the push-button task during the turn walk, poorer reaction time response (slower) was associated with 28% lower (P=.04) odds of recurrent fall history. On the visual-spatial task, poorer walking-time response (slower) was associated with 34% (P=.02) and 42% (P=.01) higher odds of recurrent falls history on the straight and turn walks, respectively.

CONCLUSION:

These findings suggest that walking more slowly in response to a visual-spatial decision task may identify individuals at risk for multiple falls. Prospective studies are needed to confirm the prognostic value of poor walking responses in a dual-task setting for multiple falls.

[Indexed for MEDLINE]

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