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• W2000261287 abstract "Dual tasks that involve walking and cognitive interference tests are commonly used in mobility assessments and interventions. However, factors that explain variance in dual-task performance costs are poorly understood. We, therefore, examined the moderating effects of two putative constructs, postural reserve and hazard estimate, on performance on a walking while talking paradigm. Participants were 285 non-demented older adults (mean age = 76.9 years; %female = 54.4). Postural reserve was operationalized as the presence or absence of clinical gait abnormalities. An empirical factor, based on measures of executive functions, served as a marker for hazard estimate. The moderation effects of postural reserve and hazard estimate on dual-task costs were examined via two-way interactions in a joint linear mixed effect model. Significant dual-task costs were observed for gait speed (95% CI = 30.814 to 39.121) and cognitive accuracy (95% CI = 6.568 to 13.607). High hazard estimate had a protective effect against decline in gait speed (95% CI = −8.372 to −0.151) and cognitive accuracy (95% CI = −8.372 to −0.680). Poor postural reserve was associated with reduced decline in gait speed (95% CI = −9.611 to −0.702) but did not moderate the decline in cognitive accuracy (95% CI = −3.016 to 4.559). Assessing postural reserve and hazard estimate can help improve mobility risk assessment procedures and interventions for individuals with cognitive and movement disorders." @default.
• W2000261287 created "2016-06-24" @default.
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• W2000261287 date "2013-08-13" @default.
• W2000261287 modified "2023-10-13" @default.
• W2000261287 title "Performance variance on walking while talking tasks: theory, findings, and clinical implications" @default.
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• W2000261287 doi "https://doi.org/10.1007/s11357-013-9570-7" @default.
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