Abstract
Background
Functional decline in older adults may be affected by clinical status, physical fitness, and social determinants of health.
Aims
This study aimed to explore social determinants of health and health/clinical determinants on two outcomes of functional physical capacity.
Methods and results
Therefore, a population-based sample of 327 older adults (69 ± 7 years; 83.5% women) underwent demographical and clinical questionnaires, risk factors assessments, 6-min walk testing (walking capacity), and handgrip strength testing. Based on multivariable linear regression models, age ( – 4.05 m; – 5.3 to – 2.8), being men (71.40 m; 50.5–92.3), body mass index ( – 3.88 m; – 5.6 to – 2.1), and quality of life (18.48 m; 6.3–30.6) remained as predictive variables for walking capacity (R2 = 30.8%). In the final model for handgrip strength, age ( – 0.6% kgf; 0.89–0.2) and male sex (65.2% kgf; 55.3–75.8) remained as predictive variables.
Discussion
The mean values for our predicted outcomes were similar to those of healthy and physically active ones, which may be a consequence of the engagement of our sample in a lifestyle program. Also, although using the conceptual framework model to choose explanatory variables with a solid rationale, some of them may present reverse causality in this study setting, regardless of our efforts to annulate this type of bias.
Conclusions
Despite exploratory analyses including contextual factors as potential predictors of walking capacity and handgrip strength, only outcomes at the individual levels were associated, either positively or negatively, with the variations presented by this studied sample of older adults.
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Acknowledgements
We would like to thank Rogério Boff Borges, a statistician at the Biostatistics Unit of the Hospital de Clínicas of Porto Alegre, for his help and guidance in carrying out the statistical analysis for this article.
Funding
This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001; National Institute of Science and Technology for Health Technology Assessment (IATS)—FAPERGS/Brasil; National Council on Technology and Scientific Development (CNPq).
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LOP conceived the study idea, conducted statistical analyses, and drafted the manuscript; LH and NLO assisted in the drafted the manuscript, editing, and revising the document; DU helped conceive the study idea, and edited and revised the manuscript. All authors have read and approved the final version of the manuscript, and agree with the order of presentation of the authors.
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The study was approved by the Institutional Review Board of the Hospital de Clínicas de Porto Alegre (GPPG 2018-0100; CAAE 84093317600005327). The procedures followed national guidelines for bioethics in research and all participants read and signed the informed consent before starting their enrollment in the study.
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Pfeifer, L.O., Helal, L., Oliveira, N.L. et al. Correlates of functional physical capacity in physically active older adults: a conceptual-framework-based cross-sectional analysis of social determinants of health and clinical parameters. Aging Clin Exp Res 35, 127–136 (2023). https://doi.org/10.1007/s40520-022-02274-x
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DOI: https://doi.org/10.1007/s40520-022-02274-x