Roee Holtzer|Jeannette R. Mahoney|Joe Verghese
Intraindividual Variability in Executive Functions but Not Speed of Processing or Conflict Resolution Predicts Performance Differences in Gait Speed in Older Adults
Yeshiva University|Albert Einstein College of Medicine|Yeshiva University|Albert Einstein College of Medicine|Albert Einstein College of Medicine|Yeshiva University
relationship executive functions ef gait speed well established however exception dual tasking key components ef predict differences gait performance determined therefore current study designed determine whether processing speed conflict resolution intraindividual variability ef predicted variance gait performance single dualtask conditionsparticipants 234 nondemented older adults mean age 7648 years 55 women enrolled communitybased cohort study gait speed assessed using instrumented walkway single dualtask conditions flanker task used assess efresults linear mixed effects model showed dualtask interference caused significant dualtask cost gait speed estimate 3599 95 ci 33193880 b cognitive predictors intraindividual variability associated gait speed estimate 606 95 ci 111 10 unadjusted analyses three ef measures related gait speed single dualtask conditions however fully adjusted linear regression analysis intraindividual variability predicted performance differences gait speed dual tasking b 901 95 ci 1557 245among three ef measures assessed intraindividual variability speed processing conflict resolution predicted performance differences gait speed