4.7 Article

Towards a core-set of mobility measures in ageing research: The need to define mobility and its constructs

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BMC GERIATRICS
卷 23, 期 1, 页码 -

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BMC
DOI: 10.1186/s12877-023-03859-5

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Mobility limitation; Physical capacity; Physical performance

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This study aimed to clarify the definition, conceptual framework, and underlying constructs of mobility in healthy aging in order to facilitate data comparison and sharing. A variety of definitions, conceptual frameworks, and constructs of mobility were found in the literature and among experts. While there was some agreement on the definition and key constructs of mobility, further clarification and categorization of constructs is needed.
BackgroundMobility is a key determinant and outcome of healthy ageing but its definition, conceptual framework and underlying constructs within the physical domain may need clarification for data comparison and sharing in ageing research. This study aimed to (1) review definitions and conceptual frameworks of mobility, (2) explore agreement on the definition of mobility, conceptual frameworks, constructs and measures of mobility, and (3) define, classify and identify constructs.MethodsA three-step approach was adopted: a literature review and two rounds of expert questionnaires (n = 64, n = 31, respectively). Agreement on statements was assessed using a five-point Likert scale; the answer options 'strongly agree' or 'agree' were combined. The percentage of respondents was subsequently used to classify agreements for each statement as: strong (>= 80%), moderate (>= 70% and < 80%) and low (< 70%).ResultsA variety of definitions of mobility, conceptual frameworks and constructs were found in the literature and among respondents. Strong agreement was found on defining mobility as the ability to move, including the use of assistive devices. Multiple constructs and measures were identified, but low agreements and variability were found on definitions, classifications and identification of constructs. Strong agreements were found on defining physical capacity (what a person is maximally capable of, 'can do') and performance (what a person actually does in their daily life, 'do') as key constructs of mobility.ConclusionAgreements on definitions of mobility, physical capacity and performance were found, but constructs of mobility need to be further identified, defined and classified appropriately. Clear terminology and definitions are essential to facilitate communication and interpretation in operationalising the physical domain of mobility as a prerequisite for standardisation of mobility measures.

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