Roee Holtzer|Cuiling Wang|Joe Verghese
Performance variance on walking while talking tasks: theory, findings, and clinical implications
Yeshiva University|Albert Einstein College of Medicine|Yeshiva University|Albert Einstein College of Medicine|Yeshiva University
dual tasks involve walking cognitive interference tests commonly used mobility assessments interventions however factors explain variance dualtask performance costs poorly understood therefore examined moderating effects two putative constructs postural reserve hazard estimate performance walking talking paradigm participants 285 nondemented older adults mean age 769 years female 544 postural reserve operationalized presence absence clinical gait abnormalities empirical factor based measures executive functions served marker hazard estimate moderation effects postural reserve hazard estimate dualtask costs examined via twoway interactions joint linear mixed effect model significant dualtask costs observed gait speed 95 ci 30814 39121 cognitive accuracy 95 ci 6568 13607 high hazard estimate protective effect decline gait speed 95 ci 8372 0151 cognitive accuracy 95 ci 8372 0680 poor postural reserve associated reduced decline gait speed 95 ci 9611 0702 moderate decline cognitive accuracy 95 ci 3016 4559 assessing postural reserve hazard estimate help improve mobility risk assessment procedures interventions individuals cognitive movement disorders