TY  - JOUR
PY  - 2015//
TI  - Intraindividual reaction time variability, falls, and gait in old age: a systematic review
JO  - Journals of gerontology. Series B: psychological sciences and social sciences
A1  - Graveson, Jack
A1  - Bauermeister, Sarah
A1  - McKeown, Denis
A1  - Bunce, David
SP  - 857
EP  - 864
VL  - 71
IS  - 5
N2  - OBJECTIVES: Intraindividual variability (IIV) refers to the variation in reaction time (RT) performance across a given cognitive task. As greater IIV may reflect compromise of the frontal circuitry implicated in falls and gait impairment in older adults, we conducted a systematic review of the literature relating to this issue. <br><br>METHODS: Searches were conducted of electronic databases that identified empirical investigations of IIV, falls, and gait in older adult samples with a mean age of 65 years or older. Data were extracted relating to IIV measures, study population, and outcomes. <br><br>RESULTS: Of 433 studies initially identified, 9 met inclusion criteria for IIV and falls (n = 5), and gait (n = 4). Representing a total of 2,810 older participants, all of the studies of IIV and falls showed that elevated variability was associated with increased risk of falling, and half of the studies of gait indicated greater IIV was related to gait impairment. <br><br>DISCUSSION: Across studies, IIV measures were consistently associated with falls in older persons and demonstrated some potential in relation to gait. IIV metrics may, therefore, have considerable potential in clinical contexts and supplement existing test batteries in the assessment of falls risk and gait impairment in older populations.<p />  <p>Language: en</p>
LA  - en
SN  - 1079-5014
UR  - http://dx.doi.org/10.1093/geronb/gbv027
ID  - ref1
ER  -